fix(challenge-md): Fix file names and preserve challenge order in meta.json
This commit is contained in:
Bouncey
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---
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id: a77dbc43c33f39daa4429b4f
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title: Boo who
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isRequired: true
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challengeType: 5
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---
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## Description
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<section id='description'>
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Check if a value is classified as a boolean primitive. Return true or false.
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Boolean primitives are true and false.
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Remember to use <a href='http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514' target='_blank'>Read-Search-Ask</a> if you get stuck. Try to pair program. Write your own code.
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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- text: <code>booWho(true)</code> should return true.
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testString: 'assert.strictEqual(booWho(true), true, ''<code>booWho(true)</code> should return true.'');'
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- text: <code>booWho(false)</code> should return true.
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testString: 'assert.strictEqual(booWho(false), true, ''<code>booWho(false)</code> should return true.'');'
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- text: '<code>booWho([1, 2, 3])</code> should return false.'
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testString: 'assert.strictEqual(booWho([1, 2, 3]), false, ''<code>booWho([1, 2, 3])</code> should return false.'');'
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- text: '<code>booWho([].slice)</code> should return false.'
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testString: 'assert.strictEqual(booWho([].slice), false, ''<code>booWho([].slice)</code> should return false.'');'
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- text: '<code>booWho({ "a": 1 })</code> should return false.'
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testString: 'assert.strictEqual(booWho({ "a": 1 }), false, ''<code>booWho({ "a": 1 })</code> should return false.'');'
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- text: <code>booWho(1)</code> should return false.
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testString: 'assert.strictEqual(booWho(1), false, ''<code>booWho(1)</code> should return false.'');'
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- text: <code>booWho(NaN)</code> should return false.
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testString: 'assert.strictEqual(booWho(NaN), false, ''<code>booWho(NaN)</code> should return false.'');'
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- text: <code>booWho("a")</code> should return false.
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testString: 'assert.strictEqual(booWho("a"), false, ''<code>booWho("a")</code> should return false.'');'
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- text: <code>booWho("true")</code> should return false.
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testString: 'assert.strictEqual(booWho("true"), false, ''<code>booWho("true")</code> should return false.'');'
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- text: <code>booWho("false")</code> should return false.
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testString: 'assert.strictEqual(booWho("false"), false, ''<code>booWho("false")</code> should return false.'');'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function booWho(bool) {
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// What is the new fad diet for ghost developers? The Boolean.
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return bool;
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}
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booWho(null);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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function booWho(bool) {
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return typeof bool === "boolean";
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}
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booWho(null);
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```
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</section>
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---
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id: a9bd25c716030ec90084d8a1
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title: Chunky Monkey
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isRequired: true
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challengeType: 5
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---
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## Description
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<section id='description'>
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Write a function that splits an array (first argument) into groups the length of <code>size</code> (second argument) and returns them as a two-dimensional array.
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Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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- text: '<code>chunkArrayInGroups(["a", "b", "c", "d"], 2)</code> should return <code>[["a", "b"], ["c", "d"]]</code>.'
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testString: 'assert.deepEqual(chunkArrayInGroups(["a", "b", "c", "d"], 2), [["a", "b"], ["c", "d"]], ''<code>chunkArrayInGroups(["a", "b", "c", "d"], 2)</code> should return <code>[["a", "b"], ["c", "d"]]</code>.'');'
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- text: '<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5], 3)</code> should return <code>[[0, 1, 2], [3, 4, 5]]</code>.'
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testString: 'assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5], 3), [[0, 1, 2], [3, 4, 5]], ''<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5], 3)</code> should return <code>[[0, 1, 2], [3, 4, 5]]</code>.'');'
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- text: '<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5], 2)</code> should return <code>[[0, 1], [2, 3], [4, 5]]</code>.'
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testString: 'assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5], 2), [[0, 1], [2, 3], [4, 5]], ''<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5], 2)</code> should return <code>[[0, 1], [2, 3], [4, 5]]</code>.'');'
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- text: '<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5], 4)</code> should return <code>[[0, 1, 2, 3], [4, 5]]</code>.'
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testString: 'assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5], 4), [[0, 1, 2, 3], [4, 5]], ''<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5], 4)</code> should return <code>[[0, 1, 2, 3], [4, 5]]</code>.'');'
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- text: '<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6], 3)</code> should return <code>[[0, 1, 2], [3, 4, 5], [6]]</code>.'
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testString: 'assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6], 3), [[0, 1, 2], [3, 4, 5], [6]], ''<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6], 3)</code> should return <code>[[0, 1, 2], [3, 4, 5], [6]]</code>.'');'
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- text: '<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6, 7, 8], 4)</code> should return <code>[[0, 1, 2, 3], [4, 5, 6, 7], [8]]</code>.'
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testString: 'assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6, 7, 8], 4), [[0, 1, 2, 3], [4, 5, 6, 7], [8]], ''<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6, 7, 8], 4)</code> should return <code>[[0, 1, 2, 3], [4, 5, 6, 7], [8]]</code>.'');'
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- text: '<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6, 7, 8], 2)</code> should return <code>[[0, 1], [2, 3], [4, 5], [6, 7], [8]]</code>.'
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testString: 'assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6, 7, 8], 2), [[0, 1], [2, 3], [4, 5], [6, 7], [8]], ''<code>chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6, 7, 8], 2)</code> should return <code>[[0, 1], [2, 3], [4, 5], [6, 7], [8]]</code>.'');'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function chunkArrayInGroups(arr, size) {
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// Break it up.
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return arr;
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}
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chunkArrayInGroups(["a", "b", "c", "d"], 2);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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function chunkArrayInGroups(arr, size) {
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let out = [];
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for (let i = 0; i < arr.length; i += size) {
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out.push(arr.slice(i, i + size));
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}
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return out;
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}
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chunkArrayInGroups(["a", "b", "c", "d"], 2);
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```
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</section>
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---
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id: acda2fb1324d9b0fa741e6b5
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title: Confirm the Ending
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isRequired: true
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challengeType: 5
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---
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## Description
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<section id='description'>
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Check if a string (first argument, <code>str</code>) ends with the given target string (second argument, <code>target</code>).
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This challenge <em>can</em> be solved with the <code>.endsWith()</code> method, which was introduced in ES2015. But for the purpose of this challenge, we would like you to use one of the JavaScript substring methods instead.
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Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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- text: '<code>confirmEnding("Bastian", "n")</code> should return true.'
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testString: 'assert(confirmEnding("Bastian", "n") === true, ''<code>confirmEnding("Bastian", "n")</code> should return true.'');'
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- text: '<code>confirmEnding("Congratulation", "on")</code> should return true.'
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testString: 'assert(confirmEnding("Congratulation", "on") === true, ''<code>confirmEnding("Congratulation", "on")</code> should return true.'');'
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- text: '<code>confirmEnding("Connor", "n")</code> should return false.'
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testString: 'assert(confirmEnding("Connor", "n") === false, ''<code>confirmEnding("Connor", "n")</code> should return false.'');'
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- text: '<code>confirmEnding("Walking on water and developing software from a specification are easy if both are frozen", "specification")</code> should return false.'
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testString: 'assert(confirmEnding("Walking on water and developing software from a specification are easy if both are frozen", "specification") === false, ''<code>confirmEnding("Walking on water and developing software from a specification are easy if both are frozen", "specification")</code> should return false.'');'
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- text: '<code>confirmEnding("He has to give me a new name", "name")</code> should return true.'
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testString: 'assert(confirmEnding("He has to give me a new name", "name") === true, ''<code>confirmEnding("He has to give me a new name", "name")</code> should return true.'');'
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- text: '<code>confirmEnding("Open sesame", "same")</code> should return true.'
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testString: 'assert(confirmEnding("Open sesame", "same") === true, ''<code>confirmEnding("Open sesame", "same")</code> should return true.'');'
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- text: '<code>confirmEnding("Open sesame", "pen")</code> should return false.'
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testString: 'assert(confirmEnding("Open sesame", "pen") === false, ''<code>confirmEnding("Open sesame", "pen")</code> should return false.'');'
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- text: '<code>confirmEnding("Open sesame", "game")</code> should return false.'
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testString: 'assert(confirmEnding("Open sesame", "game") === false, ''<code>confirmEnding("Open sesame", "game")</code> should return false.'');'
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- text: '<code>confirmEnding("If you want to save our world, you must hurry. We dont know how much longer we can withstand the nothing", "mountain")</code> should return false.'
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testString: 'assert(confirmEnding("If you want to save our world, you must hurry. We dont know how much longer we can withstand the nothing", "mountain") === false, ''<code>confirmEnding("If you want to save our world, you must hurry. We dont know how much longer we can withstand the nothing", "mountain")</code> should return false.'');'
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- text: '<code>confirmEnding("Abstraction", "action")</code> should return true.'
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testString: 'assert(confirmEnding("Abstraction", "action") === true, ''<code>confirmEnding("Abstraction", "action")</code> should return true.'');'
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- text: Do not use the built-in method <code>.endsWith()</code> to solve the challenge.
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testString: 'assert(!(/\.endsWith\(.*?\)\s*?;?/.test(code)) && !(/\[''endsWith''\]/.test(code)), ''Do not use the built-in method <code>.endsWith()</code> to solve the challenge.'');'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function confirmEnding(str, target) {
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// "Never give up and good luck will find you."
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// -- Falcor
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return str;
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}
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confirmEnding("Bastian", "n");
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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function confirmEnding(str, target) {
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return str.substring(str.length - target.length) === target;
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}
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confirmEnding("Bastian", "n");
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```
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</section>
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@@ -0,0 +1,76 @@
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---
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id: 56533eb9ac21ba0edf2244b3
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title: Convert Celsius to Fahrenheit
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challengeType: 1
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isRequired: true
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---
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## Description
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<section id='description'>
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The algorithm to convert from Celsius to Fahrenheit is the temperature in Celsius times <code>9/5</code>, plus <code>32</code>.
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You are given a variable <code>celsius</code> representing a temperature in Celsius. Use the variable <code>fahrenheit</code> already defined and assign it the Fahrenheit temperature equivalent to the given Celsius temperature. Use the algorithm mentioned above to help convert the Celsius temperature to Fahrenheit.
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Don't worry too much about the function and return statements as they will be covered in future challenges. For now, only use operators that you have already learned.
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</section>
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## Instructions
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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- text: <code>convertToF(0)</code> should return a number
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testString: 'assert(typeof convertToF(0) === ''number'', ''<code>convertToF(0)</code> should return a number'');'
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- text: <code>convertToF(-30)</code> should return a value of <code>-22</code>
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testString: 'assert(convertToF(-30) === -22, ''<code>convertToF(-30)</code> should return a value of <code>-22</code>'');'
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- text: <code>convertToF(-10)</code> should return a value of <code>14</code>
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testString: 'assert(convertToF(-10) === 14, ''<code>convertToF(-10)</code> should return a value of <code>14</code>'');'
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- text: <code>convertToF(0)</code> should return a value of <code>32</code>
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testString: 'assert(convertToF(0) === 32, ''<code>convertToF(0)</code> should return a value of <code>32</code>'');'
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- text: <code>convertToF(20)</code> should return a value of <code>68</code>
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testString: 'assert(convertToF(20) === 68, ''<code>convertToF(20)</code> should return a value of <code>68</code>'');'
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- text: <code>convertToF(30)</code> should return a value of <code>86</code>
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testString: 'assert(convertToF(30) === 86, ''<code>convertToF(30)</code> should return a value of <code>86</code>'');'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function convertToF(celsius) {
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let fahrenheit;
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return fahrenheit;
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}
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convertToF(30);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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function convertToF(celsius) {
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let fahrenheit = celsius * 9/5 + 32;
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return fahrenheit;
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}
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convertToF(30);
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```
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</section>
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@@ -0,0 +1,74 @@
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---
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id: a302f7aae1aa3152a5b413bc
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title: Factorialize a Number
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isRequired: true
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challengeType: 5
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---
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## Description
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<section id='description'>
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Return the factorial of the provided integer.
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If the integer is represented with the letter n, a factorial is the product of all positive integers less than or equal to n.
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Factorials are often represented with the shorthand notation <code>n!</code>
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For example: <code>5! = 1 * 2 * 3 * 4 * 5 = 120</code>
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Only integers greater than or equal to zero will be supplied to the function.
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Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
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</section>
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## Instructions
|
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<section id='instructions'>
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</section>
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## Tests
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<section id='tests'>
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```yml
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- text: <code>factorialize(5)</code> should return a number.
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testString: 'assert(typeof factorialize(5) === ''number'', ''<code>factorialize(5)</code> should return a number.'');'
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- text: <code>factorialize(5)</code> should return 120.
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testString: 'assert(factorialize(5) === 120, ''<code>factorialize(5)</code> should return 120.'');'
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- text: <code>factorialize(10)</code> should return 3628800.
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testString: 'assert(factorialize(10) === 3628800, ''<code>factorialize(10)</code> should return 3628800.'');'
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- text: <code>factorialize(20)</code> should return 2432902008176640000.
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testString: 'assert(factorialize(20) === 2432902008176640000, ''<code>factorialize(20)</code> should return 2432902008176640000.'');'
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- text: <code>factorialize(0)</code> should return 1.
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testString: 'assert(factorialize(0) === 1, ''<code>factorialize(0)</code> should return 1.'');'
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```
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</section>
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## Challenge Seed
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||||
<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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function factorialize(num) {
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return num;
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}
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factorialize(5);
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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function factorialize(num) {
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return num < 1 ? 1 : num * factorialize(num - 1);
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}
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|
||||
factorialize(5);
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,71 @@
|
||||
---
|
||||
id: adf08ec01beb4f99fc7a68f2
|
||||
title: Falsy Bouncer
|
||||
isRequired: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
Remove all falsy values from an array.
|
||||
Falsy values in JavaScript are <code>false</code>, <code>null</code>, <code>0</code>, <code>""</code>, <code>undefined</code>, and <code>NaN</code>.
|
||||
Hint: Try converting each value to a Boolean.
|
||||
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: '<code>bouncer([7, "ate", "", false, 9])</code> should return <code>[7, "ate", 9]</code>.'
|
||||
testString: 'assert.deepEqual(bouncer([7, "ate", "", false, 9]), [7, "ate", 9], ''<code>bouncer([7, "ate", "", false, 9])</code> should return <code>[7, "ate", 9]</code>.'');'
|
||||
- text: '<code>bouncer(["a", "b", "c"])</code> should return <code>["a", "b", "c"]</code>.'
|
||||
testString: 'assert.deepEqual(bouncer(["a", "b", "c"]), ["a", "b", "c"], ''<code>bouncer(["a", "b", "c"])</code> should return <code>["a", "b", "c"]</code>.'');'
|
||||
- text: '<code>bouncer([false, null, 0, NaN, undefined, ""])</code> should return <code>[]</code>.'
|
||||
testString: 'assert.deepEqual(bouncer([false, null, 0, NaN, undefined, ""]), [], ''<code>bouncer([false, null, 0, NaN, undefined, ""])</code> should return <code>[]</code>.'');'
|
||||
- text: '<code>bouncer([1, null, NaN, 2, undefined])</code> should return <code>[1, 2]</code>.'
|
||||
testString: 'assert.deepEqual(bouncer([1, null, NaN, 2, undefined]), [1, 2], ''<code>bouncer([1, null, NaN, 2, undefined])</code> should return <code>[1, 2]</code>.'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function bouncer(arr) {
|
||||
// Don't show a false ID to this bouncer.
|
||||
return arr;
|
||||
}
|
||||
|
||||
bouncer([7, "ate", "", false, 9]);
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function bouncer(arr) {
|
||||
return arr.filter(e => e);
|
||||
}
|
||||
|
||||
bouncer([7, "ate", "", false, 9]);
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,73 @@
|
||||
---
|
||||
id: a26cbbe9ad8655a977e1ceb5
|
||||
title: Find the Longest Word in a String
|
||||
isRequired: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
Return the length of the longest word in the provided sentence.
|
||||
Your response should be a number.
|
||||
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: <code>findLongestWordLength("The quick brown fox jumped over the lazy dog")</code> should return a number.
|
||||
testString: 'assert(typeof findLongestWordLength("The quick brown fox jumped over the lazy dog") === "number", ''<code>findLongestWordLength("The quick brown fox jumped over the lazy dog")</code> should return a number.'');'
|
||||
- text: <code>findLongestWordLength("The quick brown fox jumped over the lazy dog")</code> should return 6.
|
||||
testString: 'assert(findLongestWordLength("The quick brown fox jumped over the lazy dog") === 6, ''<code>findLongestWordLength("The quick brown fox jumped over the lazy dog")</code> should return 6.'');'
|
||||
- text: <code>findLongestWordLength("May the force be with you")</code> should return 5.
|
||||
testString: 'assert(findLongestWordLength("May the force be with you") === 5, ''<code>findLongestWordLength("May the force be with you")</code> should return 5.'');'
|
||||
- text: <code>findLongestWordLength("Google do a barrel roll")</code> should return 6.
|
||||
testString: 'assert(findLongestWordLength("Google do a barrel roll") === 6, ''<code>findLongestWordLength("Google do a barrel roll")</code> should return 6.'');'
|
||||
- text: <code>findLongestWordLength("What is the average airspeed velocity of an unladen swallow")</code> should return 8.
|
||||
testString: 'assert(findLongestWordLength("What is the average airspeed velocity of an unladen swallow") === 8, ''<code>findLongestWordLength("What is the average airspeed velocity of an unladen swallow")</code> should return 8.'');'
|
||||
- text: <code>findLongestWordLength("What if we try a super-long word such as otorhinolaryngology")</code> should return 19.
|
||||
testString: 'assert(findLongestWordLength("What if we try a super-long word such as otorhinolaryngology") === 19, ''<code>findLongestWordLength("What if we try a super-long word such as otorhinolaryngology")</code> should return 19.'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function findLongestWordLength(str) {
|
||||
return str.length;
|
||||
}
|
||||
|
||||
findLongestWordLength("The quick brown fox jumped over the lazy dog");
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function findLongestWordLength(str) {
|
||||
return str.split(' ').sort((a, b) => b.length - a.length)[0].length;
|
||||
}
|
||||
|
||||
findLongestWordLength("The quick brown fox jumped over the lazy dog");
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,74 @@
|
||||
---
|
||||
id: a6e40f1041b06c996f7b2406
|
||||
title: Finders Keepers
|
||||
isRequired: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
Create a function that looks through an array (first argument) and returns the first element in the array that passes a truth test (second argument). If no element passes the test, return undefined.
|
||||
Remember to use <a href='http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514' target='_blank'>Read-Search-Ask</a> if you get stuck. Try to pair program. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: '<code>findElement([1, 3, 5, 8, 9, 10], function(num) { return num % 2 === 0; })</code> should return 8.'
|
||||
testString: 'assert.strictEqual(findElement([1, 3, 5, 8, 9, 10], function(num) { return num % 2 === 0; }), 8, ''<code>findElement([1, 3, 5, 8, 9, 10], function(num) { return num % 2 === 0; })</code> should return 8.'');'
|
||||
- text: '<code>findElement([1, 3, 5, 9], function(num) { return num % 2 === 0; })</code> should return undefined.'
|
||||
testString: 'assert.strictEqual(findElement([1, 3, 5, 9], function(num) { return num % 2 === 0; }), undefined, ''<code>findElement([1, 3, 5, 9], function(num) { return num % 2 === 0; })</code> should return undefined.'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function findElement(arr, func) {
|
||||
let num = 0;
|
||||
return num;
|
||||
}
|
||||
|
||||
findElement([1, 2, 3, 4], num => num % 2 === 0);
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function findElement(arr, func) {
|
||||
let num;
|
||||
|
||||
arr.some(e => {
|
||||
if (func(e)) {
|
||||
num = e;
|
||||
return true;
|
||||
}
|
||||
});
|
||||
|
||||
return num;
|
||||
}
|
||||
|
||||
findElement([1, 2, 3, 4], num => num % 2 === 0);
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,74 @@
|
||||
{
|
||||
"name": "Basic Algorithm Scripting",
|
||||
"dashedName": "basic-algorithm-scripting",
|
||||
"order": 6,
|
||||
"time": "50 hours",
|
||||
"superBlock": "javascript-algorithms-and-data-structures",
|
||||
"superOrder": 2,
|
||||
"challengeOrder": [
|
||||
[
|
||||
"56533eb9ac21ba0edf2244b3",
|
||||
"Convert Celsius to Fahrenheit"
|
||||
],
|
||||
[
|
||||
"a202eed8fc186c8434cb6d61",
|
||||
"Reverse a String"
|
||||
],
|
||||
[
|
||||
"a302f7aae1aa3152a5b413bc",
|
||||
"Factorialize a Number"
|
||||
],
|
||||
[
|
||||
"a26cbbe9ad8655a977e1ceb5",
|
||||
"Find the Longest Word in a String"
|
||||
],
|
||||
[
|
||||
"a789b3483989747d63b0e427",
|
||||
"Return Largest Numbers in Arrays"
|
||||
],
|
||||
[
|
||||
"acda2fb1324d9b0fa741e6b5",
|
||||
"Confirm the Ending"
|
||||
],
|
||||
[
|
||||
"afcc8d540bea9ea2669306b6",
|
||||
"Repeat a String Repeat a String"
|
||||
],
|
||||
[
|
||||
"ac6993d51946422351508a41",
|
||||
"Truncate a String"
|
||||
],
|
||||
[
|
||||
"a6e40f1041b06c996f7b2406",
|
||||
"Finders Keepers"
|
||||
],
|
||||
[
|
||||
"a77dbc43c33f39daa4429b4f",
|
||||
"Boo who"
|
||||
],
|
||||
[
|
||||
"ab6137d4e35944e21037b769",
|
||||
"Title Case a Sentence"
|
||||
],
|
||||
[
|
||||
"579e2a2c335b9d72dd32e05c",
|
||||
"Slice and Splice"
|
||||
],
|
||||
[
|
||||
"adf08ec01beb4f99fc7a68f2",
|
||||
"Falsy Bouncer"
|
||||
],
|
||||
[
|
||||
"a24c1a4622e3c05097f71d67",
|
||||
"Where do I Belong"
|
||||
],
|
||||
[
|
||||
"af2170cad53daa0770fabdea",
|
||||
"Mutations"
|
||||
],
|
||||
[
|
||||
"a9bd25c716030ec90084d8a1",
|
||||
"Chunky Monkey"
|
||||
]
|
||||
]
|
||||
}
|
||||
@@ -0,0 +1,85 @@
|
||||
---
|
||||
id: af2170cad53daa0770fabdea
|
||||
title: Mutations
|
||||
isRequired: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
Return true if the string in the first element of the array contains all of the letters of the string in the second element of the array.
|
||||
For example, <code>["hello", "Hello"]</code>, should return true because all of the letters in the second string are present in the first, ignoring case.
|
||||
The arguments <code>["hello", "hey"]</code> should return false because the string "hello" does not contain a "y".
|
||||
Lastly, <code>["Alien", "line"]</code>, should return true because all of the letters in "line" are present in "Alien".
|
||||
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: '<code>mutation(["hello", "hey"])</code> should return false.'
|
||||
testString: 'assert(mutation(["hello", "hey"]) === false, ''<code>mutation(["hello", "hey"])</code> should return false.'');'
|
||||
- text: '<code>mutation(["hello", "Hello"])</code> should return true.'
|
||||
testString: 'assert(mutation(["hello", "Hello"]) === true, ''<code>mutation(["hello", "Hello"])</code> should return true.'');'
|
||||
- text: '<code>mutation(["zyxwvutsrqponmlkjihgfedcba", "qrstu"])</code> should return true.'
|
||||
testString: 'assert(mutation(["zyxwvutsrqponmlkjihgfedcba", "qrstu"]) === true, ''<code>mutation(["zyxwvutsrqponmlkjihgfedcba", "qrstu"])</code> should return true.'');'
|
||||
- text: '<code>mutation(["Mary", "Army"])</code> should return true.'
|
||||
testString: 'assert(mutation(["Mary", "Army"]) === true, ''<code>mutation(["Mary", "Army"])</code> should return true.'');'
|
||||
- text: '<code>mutation(["Mary", "Aarmy"])</code> should return true.'
|
||||
testString: 'assert(mutation(["Mary", "Aarmy"]) === true, ''<code>mutation(["Mary", "Aarmy"])</code> should return true.'');'
|
||||
- text: '<code>mutation(["Alien", "line"])</code> should return true.'
|
||||
testString: 'assert(mutation(["Alien", "line"]) === true, ''<code>mutation(["Alien", "line"])</code> should return true.'');'
|
||||
- text: '<code>mutation(["floor", "for"])</code> should return true.'
|
||||
testString: 'assert(mutation(["floor", "for"]) === true, ''<code>mutation(["floor", "for"])</code> should return true.'');'
|
||||
- text: '<code>mutation(["hello", "neo"])</code> should return false.'
|
||||
testString: 'assert(mutation(["hello", "neo"]) === false, ''<code>mutation(["hello", "neo"])</code> should return false.'');'
|
||||
- text: '<code>mutation(["voodoo", "no"])</code> should return false.'
|
||||
testString: 'assert(mutation(["voodoo", "no"]) === false, ''<code>mutation(["voodoo", "no"])</code> should return false.'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function mutation(arr) {
|
||||
return arr;
|
||||
}
|
||||
|
||||
mutation(["hello", "hey"]);
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function mutation(arr) {
|
||||
let hash = Object.create(null);
|
||||
|
||||
arr[0].toLowerCase().split('').forEach(c => hash[c] = true);
|
||||
|
||||
return !arr[1].toLowerCase().split('').filter(c => !hash[c]).length;
|
||||
}
|
||||
|
||||
mutation(["hello", "hey"]);
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,76 @@
|
||||
---
|
||||
id: afcc8d540bea9ea2669306b6
|
||||
title: Repeat a String Repeat a String
|
||||
isRequired: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
Repeat a given string <code>str</code> (first argument) for <code>num</code> times (second argument). Return an empty string if <code>num</code> is not a positive number.
|
||||
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: '<code>repeatStringNumTimes("*", 3)</code> should return <code>"***"</code>.'
|
||||
testString: 'assert(repeatStringNumTimes("*", 3) === "***", ''<code>repeatStringNumTimes("*", 3)</code> should return <code>"***"</code>.'');'
|
||||
- text: '<code>repeatStringNumTimes("abc", 3)</code> should return <code>"abcabcabc"</code>.'
|
||||
testString: 'assert(repeatStringNumTimes("abc", 3) === "abcabcabc", ''<code>repeatStringNumTimes("abc", 3)</code> should return <code>"abcabcabc"</code>.'');'
|
||||
- text: '<code>repeatStringNumTimes("abc", 4)</code> should return <code>"abcabcabcabc"</code>.'
|
||||
testString: 'assert(repeatStringNumTimes("abc", 4) === "abcabcabcabc", ''<code>repeatStringNumTimes("abc", 4)</code> should return <code>"abcabcabcabc"</code>.'');'
|
||||
- text: '<code>repeatStringNumTimes("abc", 1)</code> should return <code>"abc"</code>.'
|
||||
testString: 'assert(repeatStringNumTimes("abc", 1) === "abc", ''<code>repeatStringNumTimes("abc", 1)</code> should return <code>"abc"</code>.'');'
|
||||
- text: '<code>repeatStringNumTimes("*", 8)</code> should return <code>"********"</code>.'
|
||||
testString: 'assert(repeatStringNumTimes("*", 8) === "********", ''<code>repeatStringNumTimes("*", 8)</code> should return <code>"********"</code>.'');'
|
||||
- text: '<code>repeatStringNumTimes("abc", -2)</code> should return <code>""</code>.'
|
||||
testString: 'assert(repeatStringNumTimes("abc", -2) === "", ''<code>repeatStringNumTimes("abc", -2)</code> should return <code>""</code>.'');'
|
||||
- text: The built-in <code>repeat()</code>-method should not be used
|
||||
testString: 'assert(!/\.repeat/g.test(code), ''The built-in <code>repeat()</code>-method should not be used'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function repeatStringNumTimes(str, num) {
|
||||
// repeat after me
|
||||
return str;
|
||||
}
|
||||
|
||||
repeatStringNumTimes("abc", 3);
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function repeatStringNumTimes(str, num) {
|
||||
if (num < 0) return '';
|
||||
return num === 1 ? str : str + repeatStringNumTimes(str, num-1);
|
||||
}
|
||||
|
||||
repeatStringNumTimes("abc", 3);
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,70 @@
|
||||
---
|
||||
id: a789b3483989747d63b0e427
|
||||
title: Return Largest Numbers in Arrays
|
||||
isRequired: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
Return an array consisting of the largest number from each provided sub-array. For simplicity, the provided array will contain exactly 4 sub-arrays.
|
||||
Remember, you can iterate through an array with a simple for loop, and access each member with array syntax <code>arr[i]</code>.
|
||||
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: '<code>largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]])</code> should return an array.'
|
||||
testString: 'assert(largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]).constructor === Array, ''<code>largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]])</code> should return an array.'');'
|
||||
- text: '<code>largestOfFour([[13, 27, 18, 26], [4, 5, 1, 3], [32, 35, 37, 39], [1000, 1001, 857, 1]])</code> should return <code>[27, 5, 39, 1001]</code>.'
|
||||
testString: 'assert.deepEqual(largestOfFour([[13, 27, 18, 26], [4, 5, 1, 3], [32, 35, 37, 39], [1000, 1001, 857, 1]]), [27, 5, 39, 1001], ''<code>largestOfFour([[13, 27, 18, 26], [4, 5, 1, 3], [32, 35, 37, 39], [1000, 1001, 857, 1]])</code> should return <code>[27, 5, 39, 1001]</code>.'');'
|
||||
- text: '<code>largestOfFour([[4, 9, 1, 3], [13, 35, 18, 26], [32, 35, 97, 39], [1000000, 1001, 857, 1]])</code> should return <code>[9, 35, 97, 1000000]</code>.'
|
||||
testString: 'assert.deepEqual(largestOfFour([[4, 9, 1, 3], [13, 35, 18, 26], [32, 35, 97, 39], [1000000, 1001, 857, 1]]), [9, 35, 97, 1000000], ''<code>largestOfFour([[4, 9, 1, 3], [13, 35, 18, 26], [32, 35, 97, 39], [1000000, 1001, 857, 1]])</code> should return <code>[9, 35, 97, 1000000]</code>.'');'
|
||||
- text: '<code>largestOfFour([[17, 23, 25, 12], [25, 7, 34, 48], [4, -10, 18, 21], [-72, -3, -17, -10]])</code> should return <code>[25, 48, 21, -3]</code>.'
|
||||
testString: 'assert.deepEqual(largestOfFour([[17, 23, 25, 12], [25, 7, 34, 48], [4, -10, 18, 21], [-72, -3, -17, -10]]), [25, 48, 21, -3], ''<code>largestOfFour([[17, 23, 25, 12], [25, 7, 34, 48], [4, -10, 18, 21], [-72, -3, -17, -10]])</code> should return <code>[25, 48, 21, -3]</code>.'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function largestOfFour(arr) {
|
||||
// You can do this!
|
||||
return arr;
|
||||
}
|
||||
|
||||
largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function largestOfFour(arr) {
|
||||
return arr.map(subArr => Math.max.apply(null, subArr));
|
||||
}
|
||||
|
||||
largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,70 @@
|
||||
---
|
||||
id: a202eed8fc186c8434cb6d61
|
||||
title: Reverse a String
|
||||
isRequired: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
Reverse the provided string.
|
||||
You may need to turn the string into an array before you can reverse it.
|
||||
Your result must be a string.
|
||||
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: <code>reverseString("hello")</code> should return a string.
|
||||
testString: 'assert(typeof reverseString("hello") === "string", ''<code>reverseString("hello")</code> should return a string.'');'
|
||||
- text: <code>reverseString("hello")</code> should become <code>"olleh"</code>.
|
||||
testString: 'assert(reverseString("hello") === "olleh", ''<code>reverseString("hello")</code> should become <code>"olleh"</code>.'');'
|
||||
- text: <code>reverseString("Howdy")</code> should become <code>"ydwoH"</code>.
|
||||
testString: 'assert(reverseString("Howdy") === "ydwoH", ''<code>reverseString("Howdy")</code> should become <code>"ydwoH"</code>.'');'
|
||||
- text: <code>reverseString("Greetings from Earth")</code> should return <code>"htraE morf sgniteerG"</code>.
|
||||
testString: 'assert(reverseString("Greetings from Earth") === "htraE morf sgniteerG", ''<code>reverseString("Greetings from Earth")</code> should return <code>"htraE morf sgniteerG"</code>.'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function reverseString(str) {
|
||||
return str;
|
||||
}
|
||||
|
||||
reverseString("hello");
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function reverseString(str) {
|
||||
return str.split('').reverse().join('');
|
||||
}
|
||||
|
||||
reverseString("hello");
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,90 @@
|
||||
---
|
||||
id: 579e2a2c335b9d72dd32e05c
|
||||
title: Slice and Splice
|
||||
isRequired: true
|
||||
isBeta: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
You are given two arrays and an index.
|
||||
Use the array methods <code>slice</code> and <code>splice</code> to copy each element of the first array into the second array, in order.
|
||||
Begin inserting elements at index <code>n</code> of the second array.
|
||||
Return the resulting array. The input arrays should remain the same after the function runs.
|
||||
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: '<code>frankenSplice([1, 2, 3], [4, 5], 1)</code> should return <code>[4, 1, 2, 3, 5]</code>.'
|
||||
testString: 'assert.deepEqual(frankenSplice([1, 2, 3], [4, 5], 1), [4, 1, 2, 3, 5], ''<code>frankenSplice([1, 2, 3], [4, 5], 1)</code> should return <code>[4, 1, 2, 3, 5]</code>.'');'
|
||||
- text: '<code>frankenSplice([1, 2], ["a", "b"], 1)</code> should return <code>["a", 1, 2, "b"]</code>.'
|
||||
testString: 'assert.deepEqual(frankenSplice(testArr1, testArr2, 1), ["a", 1, 2, "b"], ''<code>frankenSplice([1, 2], ["a", "b"], 1)</code> should return <code>["a", 1, 2, "b"]</code>.'');'
|
||||
- text: '<code>frankenSplice(["claw", "tentacle"], ["head", "shoulders", "knees", "toes"], 2)</code> should return <code>["head", "shoulders", "claw", "tentacle", "knees", "toes"]</code>.'
|
||||
testString: 'assert.deepEqual(frankenSplice(["claw", "tentacle"], ["head", "shoulders", "knees", "toes"], 2), ["head", "shoulders", "claw", "tentacle", "knees", "toes"], ''<code>frankenSplice(["claw", "tentacle"], ["head", "shoulders", "knees", "toes"], 2)</code> should return <code>["head", "shoulders", "claw", "tentacle", "knees", "toes"]</code>.'');'
|
||||
- text: All elements from the first array should be added to the second array in their original order.
|
||||
testString: 'assert.deepEqual(frankenSplice([1, 2, 3, 4], [], 0), [1, 2, 3, 4], ''All elements from the first array should be added to the second array in their original order.'');'
|
||||
- text: The first array should remain the same after the function runs.
|
||||
testString: 'assert(testArr1[0] === 1 && testArr1[1] === 2, ''The first array should remain the same after the function runs.'');'
|
||||
- text: The second array should remain the same after the function runs.
|
||||
testString: 'assert(testArr2[0] === "a" && testArr2[1] === "b", ''The second array should remain the same after the function runs.'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function frankenSplice(arr1, arr2, n) {
|
||||
// It's alive. It's alive!
|
||||
return arr2;
|
||||
}
|
||||
|
||||
frankenSplice([1, 2, 3], [4, 5, 6], 1);
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
### After Test
|
||||
<div id='js-teardown'>
|
||||
|
||||
```js
|
||||
console.info('after the test');
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function frankenSplice(arr1, arr2, n) {
|
||||
// It's alive. It's alive!
|
||||
let result = arr2.slice();
|
||||
for (let i = 0; i < arr1.length; i++) {
|
||||
result.splice(n+i, 0, arr1[i]);
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
frankenSplice([1, 2, 3], [4, 5], 1);
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,69 @@
|
||||
---
|
||||
id: ab6137d4e35944e21037b769
|
||||
title: Title Case a Sentence
|
||||
isRequired: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
Return the provided string with the first letter of each word capitalized. Make sure the rest of the word is in lower case.
|
||||
For the purpose of this exercise, you should also capitalize connecting words like "the" and "of".
|
||||
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: '<code>titleCase("I'm a little tea pot")</code> should return a string.'
|
||||
testString: 'assert(typeof titleCase("I''m a little tea pot") === "string", ''<code>titleCase("I'm a little tea pot")</code> should return a string.'');'
|
||||
- text: '<code>titleCase("I'm a little tea pot")</code> should return <code>I'm A Little Tea Pot</code>.'
|
||||
testString: 'assert(titleCase("I''m a little tea pot") === "I''m A Little Tea Pot", ''<code>titleCase("I'm a little tea pot")</code> should return <code>I'm A Little Tea Pot</code>.'');'
|
||||
- text: <code>titleCase("sHoRt AnD sToUt")</code> should return <code>Short And Stout</code>.
|
||||
testString: 'assert(titleCase("sHoRt AnD sToUt") === "Short And Stout", ''<code>titleCase("sHoRt AnD sToUt")</code> should return <code>Short And Stout</code>.'');'
|
||||
- text: <code>titleCase("HERE IS MY HANDLE HERE IS MY SPOUT")</code> should return <code>Here Is My Handle Here Is My Spout</code>.
|
||||
testString: 'assert(titleCase("HERE IS MY HANDLE HERE IS MY SPOUT") === "Here Is My Handle Here Is My Spout", ''<code>titleCase("HERE IS MY HANDLE HERE IS MY SPOUT")</code> should return <code>Here Is My Handle Here Is My Spout</code>.'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function titleCase(str) {
|
||||
return str;
|
||||
}
|
||||
|
||||
titleCase("I'm a little tea pot");
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function titleCase(str) {
|
||||
return str.split(' ').map(word => word.charAt(0).toUpperCase() + word.substring(1).toLowerCase()).join(' ');
|
||||
}
|
||||
|
||||
titleCase("I'm a little tea pot");
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,77 @@
|
||||
---
|
||||
id: ac6993d51946422351508a41
|
||||
title: Truncate a String
|
||||
isRequired: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
Truncate a string (first argument) if it is longer than the given maximum string length (second argument). Return the truncated string with a <code>...</code> ending.
|
||||
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: '<code>truncateString("A-tisket a-tasket A green and yellow basket", 8)</code> should return "A-tisket...".'
|
||||
testString: 'assert(truncateString("A-tisket a-tasket A green and yellow basket", 8) === "A-tisket...", ''<code>truncateString("A-tisket a-tasket A green and yellow basket", 8)</code> should return "A-tisket...".'');'
|
||||
- text: '<code>truncateString("Peter Piper picked a peck of pickled peppers", 11)</code> should return "Peter Piper...".'
|
||||
testString: 'assert(truncateString("Peter Piper picked a peck of pickled peppers", 11) === "Peter Piper...", ''<code>truncateString("Peter Piper picked a peck of pickled peppers", 11)</code> should return "Peter Piper...".'');'
|
||||
- text: '<code>truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length)</code> should return "A-tisket a-tasket A green and yellow basket".'
|
||||
testString: 'assert(truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length) === "A-tisket a-tasket A green and yellow basket", ''<code>truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length)</code> should return "A-tisket a-tasket A green and yellow basket".'');'
|
||||
- text: '<code>truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length + 2)</code> should return "A-tisket a-tasket A green and yellow basket".'
|
||||
testString: 'assert(truncateString(''A-tisket a-tasket A green and yellow basket'', ''A-tisket a-tasket A green and yellow basket''.length + 2) === ''A-tisket a-tasket A green and yellow basket'', ''<code>truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length + 2)</code> should return "A-tisket a-tasket A green and yellow basket".'');'
|
||||
- text: '<code>truncateString("A-", 1)</code> should return "A...".'
|
||||
testString: 'assert(truncateString("A-", 1) === "A...", ''<code>truncateString("A-", 1)</code> should return "A...".'');'
|
||||
- text: '<code>truncateString("Absolutely Longer", 2)</code> should return "Ab...".'
|
||||
testString: 'assert(truncateString("Absolutely Longer", 2) === "Ab...", ''<code>truncateString("Absolutely Longer", 2)</code> should return "Ab...".'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function truncateString(str, num) {
|
||||
// Clear out that junk in your trunk
|
||||
return str;
|
||||
}
|
||||
|
||||
truncateString("A-tisket a-tasket A green and yellow basket", 8);
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function truncateString(str, num) {
|
||||
if (num >= str.length) {
|
||||
return str;
|
||||
}
|
||||
|
||||
return str.slice(0, num) + '...';
|
||||
}
|
||||
|
||||
truncateString("A-tisket a-tasket A green and yellow basket", 8);
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
@@ -0,0 +1,103 @@
|
||||
---
|
||||
id: a24c1a4622e3c05097f71d67
|
||||
title: Where do I Belong
|
||||
isRequired: true
|
||||
challengeType: 5
|
||||
---
|
||||
|
||||
## Description
|
||||
<section id='description'>
|
||||
Return the lowest index at which a value (second argument) should be inserted into an array (first argument) once it has been sorted. The returned value should be a number.
|
||||
For example, <code>getIndexToIns([1,2,3,4], 1.5)</code> should return <code>1</code> because it is greater than <code>1</code> (index 0), but less than <code>2</code> (index 1).
|
||||
Likewise, <code>getIndexToIns([20,3,5], 19)</code> should return <code>2</code> because once the array has been sorted it will look like <code>[3,5,20]</code> and <code>19</code> is less than <code>20</code> (index 2) and greater than <code>5</code> (index 1).
|
||||
Remember to use <a href="http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target="_blank">Read-Search-Ask</a> if you get stuck. Write your own code.
|
||||
</section>
|
||||
|
||||
## Instructions
|
||||
<section id='instructions'>
|
||||
|
||||
</section>
|
||||
|
||||
## Tests
|
||||
<section id='tests'>
|
||||
|
||||
```yml
|
||||
- text: '<code>getIndexToIns([10, 20, 30, 40, 50], 35)</code> should return <code>3</code>.'
|
||||
testString: 'assert(getIndexToIns([10, 20, 30, 40, 50], 35) === 3, ''<code>getIndexToIns([10, 20, 30, 40, 50], 35)</code> should return <code>3</code>.'');'
|
||||
- text: '<code>getIndexToIns([10, 20, 30, 40, 50], 35)</code> should return a number.'
|
||||
testString: 'assert(typeof(getIndexToIns([10, 20, 30, 40, 50], 35)) === "number", ''<code>getIndexToIns([10, 20, 30, 40, 50], 35)</code> should return a number.'');'
|
||||
- text: '<code>getIndexToIns([10, 20, 30, 40, 50], 30)</code> should return <code>2</code>.'
|
||||
testString: 'assert(getIndexToIns([10, 20, 30, 40, 50], 30) === 2, ''<code>getIndexToIns([10, 20, 30, 40, 50], 30)</code> should return <code>2</code>.'');'
|
||||
- text: '<code>getIndexToIns([10, 20, 30, 40, 50], 30)</code> should return a number.'
|
||||
testString: 'assert(typeof(getIndexToIns([10, 20, 30, 40, 50], 30)) === "number", ''<code>getIndexToIns([10, 20, 30, 40, 50], 30)</code> should return a number.'');'
|
||||
- text: '<code>getIndexToIns([40, 60], 50)</code> should return <code>1</code>.'
|
||||
testString: 'assert(getIndexToIns([40, 60], 50) === 1, ''<code>getIndexToIns([40, 60], 50)</code> should return <code>1</code>.'');'
|
||||
- text: '<code>getIndexToIns([40, 60], 50)</code> should return a number.'
|
||||
testString: 'assert(typeof(getIndexToIns([40, 60], 50)) === "number", ''<code>getIndexToIns([40, 60], 50)</code> should return a number.'');'
|
||||
- text: '<code>getIndexToIns([3, 10, 5], 3)</code> should return <code>0</code>.'
|
||||
testString: 'assert(getIndexToIns([3, 10, 5], 3) === 0, ''<code>getIndexToIns([3, 10, 5], 3)</code> should return <code>0</code>.'');'
|
||||
- text: '<code>getIndexToIns([3, 10, 5], 3)</code> should return a number.'
|
||||
testString: 'assert(typeof(getIndexToIns([3, 10, 5], 3)) === "number", ''<code>getIndexToIns([3, 10, 5], 3)</code> should return a number.'');'
|
||||
- text: '<code>getIndexToIns([5, 3, 20, 3], 5)</code> should return <code>2</code>.'
|
||||
testString: 'assert(getIndexToIns([5, 3, 20, 3], 5) === 2, ''<code>getIndexToIns([5, 3, 20, 3], 5)</code> should return <code>2</code>.'');'
|
||||
- text: '<code>getIndexToIns([5, 3, 20, 3], 5)</code> should return a number.'
|
||||
testString: 'assert(typeof(getIndexToIns([5, 3, 20, 3], 5)) === "number", ''<code>getIndexToIns([5, 3, 20, 3], 5)</code> should return a number.'');'
|
||||
- text: '<code>getIndexToIns([2, 20, 10], 19)</code> should return <code>2</code>.'
|
||||
testString: 'assert(getIndexToIns([2, 20, 10], 19) === 2, ''<code>getIndexToIns([2, 20, 10], 19)</code> should return <code>2</code>.'');'
|
||||
- text: '<code>getIndexToIns([2, 20, 10], 19)</code> should return a number.'
|
||||
testString: 'assert(typeof(getIndexToIns([2, 20, 10], 19)) === "number", ''<code>getIndexToIns([2, 20, 10], 19)</code> should return a number.'');'
|
||||
- text: '<code>getIndexToIns([2, 5, 10], 15)</code> should return <code>3</code>.'
|
||||
testString: 'assert(getIndexToIns([2, 5, 10], 15) === 3, ''<code>getIndexToIns([2, 5, 10], 15)</code> should return <code>3</code>.'');'
|
||||
- text: '<code>getIndexToIns([2, 5, 10], 15)</code> should return a number.'
|
||||
testString: 'assert(typeof(getIndexToIns([2, 5, 10], 15)) === "number", ''<code>getIndexToIns([2, 5, 10], 15)</code> should return a number.'');'
|
||||
- text: '<code>getIndexToIns([], 1)</code> should return <code>0</code>.'
|
||||
testString: 'assert(getIndexToIns([], 1) === 0, ''<code>getIndexToIns([], 1)</code> should return <code>0</code>.'');'
|
||||
- text: '<code>getIndexToIns([], 1)</code> should return a number.'
|
||||
testString: 'assert(typeof(getIndexToIns([], 1)) === "number", ''<code>getIndexToIns([], 1)</code> should return a number.'');'
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
|
||||
## Challenge Seed
|
||||
<section id='challengeSeed'>
|
||||
|
||||
<div id='js-seed'>
|
||||
|
||||
```js
|
||||
function getIndexToIns(arr, num) {
|
||||
// Find my place in this sorted array.
|
||||
return num;
|
||||
}
|
||||
|
||||
getIndexToIns([40, 60], 50);
|
||||
```
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
</section>
|
||||
|
||||
## Solution
|
||||
<section id='solution'>
|
||||
|
||||
|
||||
```js
|
||||
function getIndexToIns(arr, num) {
|
||||
arr = arr.sort((a, b) => a - b);
|
||||
|
||||
for (let i = 0; i < arr.length; i++) {
|
||||
if (arr[i] >= num) {
|
||||
return i;
|
||||
}
|
||||
}
|
||||
|
||||
return arr.length;
|
||||
}
|
||||
|
||||
getIndexToIns([40, 60], 50);
|
||||
|
||||
```
|
||||
|
||||
</section>
|
||||
Reference in New Issue
Block a user