finish JavaScript and OOP sections for QA
This commit is contained in:
Quincy Larson
parent
419f6507d0
commit
eef1c5136a
@ -955,7 +955,6 @@
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" // Only change code above this line.",
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"}",
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"",
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"// We use this function to show you the value of your variable in your output box.",
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"(function(){return myFunction();})();"
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],
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"type": "waypoint",
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@ -965,8 +964,8 @@
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"id": "cf1111c1c12feddfaeb1bdef",
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"title": "Generate Random Whole Numbers with JavaScript",
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"description": [
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"It's great that we can create random decimal numbers, but it's even more useful if we use it to generate random whole numbers.",
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"First, let's use <code>Math.random()</code> to create a random decimal.",
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"It's great that we can generate random decimal numbers, but it's even more useful if we use it to generate random whole numbers.",
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"First, let's use <code>Math.random()</code> to generate a random decimal.",
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"Then let's multiply this random decimal by 20.",
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"Finally, let's use another function, <code>Math.floor()</code> to round the number down to its nearest whole number.",
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"This technique will gives us a whole number between 0 and 19.",
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@ -974,11 +973,11 @@
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"Putting everything together, this is what our code looks like:",
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"<code>Math.floor(Math.random() * 20);</code>",
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"See how <code>Math.floor</code> takes <code>(Math.random() * 20)</code> as its argument? That's right - you can pass a function to another function as an argument."
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"Let's use this technique to create and return a random whole number between 0 and 9."
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"Let's use this technique to generate and return a random whole number between 0 and 9."
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],
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"tests": [
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"assert(typeof(myFunction()) === \"number\", 'message: The result of <code>myFunction</code> should be a number.');",
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"assert(editor.getValue().match(/Math.random/g), 'message: You should be using Math.random to create a random number.');",
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"assert(editor.getValue().match(/Math.random/g), 'message: You should be using Math.random to generate a random number.');",
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"assert(editor.getValue().match(/\\(\\s*?Math.random\\s*?\\(\\s*?\\)\\s*?\\*\\s*?10\\s*?\\)/g) || editor.getValue().match(/\\(\\s*?10\\s*?\\*\\s*?Math.random\\s*?\\(\\s*?\\)\\s*?\\)/g), 'message: You should have multiplied the result of <code>Math.random</code> by 10 to make it a number that is between zero and nine.');",
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"assert(editor.getValue().match(/Math.floor/g), 'message: You should use <code>Math.floor</code> to remove the decimal part of the number.');"
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],
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@ -994,7 +993,6 @@
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" // Only change code above this line.",
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"}",
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"",
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"// We use this function to show you the value of your variable in your output box.",
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"(function(){return myFunction();})();"
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],
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"type": "waypoint",
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@ -1004,28 +1002,42 @@
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"id": "cf1111c1c12feddfaeb2bdef",
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"title": "Generate Random Whole Numbers within a Range",
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"description": [
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"We can use a certain mathematical expression to get a random number between two numbers.",
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"Instead of generating a random number between zero and a given number like we did before, we can generate a random number that falls within a range of two specific numbers.",
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"To do this, we'll define a minimum number <code>min</code> and a maximum number <code>max</code>."
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"Here's the formula we'll use. Take a moment to read and try to understand what this code is doing.",
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"<code>Math.floor(Math.random() * (max - min + 1)) + min</code>",
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"By using this, we can control the output of a random number."
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"Define two variables: <code>myMin</code> and </code>myMax</code>, and set them both equal to numbers.",
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"Then create a function called <code>myFunction</code> that returns a random number that's greater than or equal to <code>myMin</code>, and is less than <code>myMax</code>."
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],
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"tests": [
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"assert(myFunction() >= min, 'message: The random number generated by <code>myFunction</code> should be greater than or equal to the minimum number.');",
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"assert(myFunction() <= max, 'message: The random number generated by <code>myFunction</code> should be less than or equal to the maximum number.');",
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"assert(myFunction() >= myMin, 'message: The random number generated by <code>myFunction</code> should be greater than or equal to your minimum number, <code>myMin</code>.');",
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"assert(myFunction() <= myMax, 'message: The random number generated by <code>myFunction</code> should be less than or equal to your maximum number, <code>myMax</code>.');",
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"assert(myFunction() % 1 === 0 , 'message: The random number generated by <code>myFunction</code> should be an integer, not a decimal.');",
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"assert((function(){if(editor.getValue().match(/max/g).length >= 3 && editor.getValue().match(/min/g).length >= 4 && editor.getValue().match(/Math.floor/g) && editor.getValue().match(/Math.random/g)){return true;}else{return false;}})(), 'message: You should be using the function given in the description to calculate the random in number in a range.');"
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"assert((function(){if(editor.getValue().match(/myMax/g).length >= 3 && editor.getValue().match(/myMin/g).length >= 4 && editor.getValue().match(/Math.floor/g) && editor.getValue().match(/Math.random/g)){return true;}else{return false;}})(), 'message: You should be using a function called <code>myFunction()</code> to calculate your random number in your range.');"
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],
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"challengeSeed": [
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"var min = 1;",
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"var max = 9;",
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"function myFunction() {",
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"var ourMin = 1;",
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"",
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"var ourMax = 9;",
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"",
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"function ourFunction() {",
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"",
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" return Math.floor(Math.random() * (ourMax - ourMin + 1)) + ourMin;",
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"",
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"}",
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"",
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" // Only change code below this line.",
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"",
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" return Math.random();",
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"",
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"",
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"",
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"",
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"",
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"",
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"",
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"",
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"// Only change code above this line.",
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"",
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"}",
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"",
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"(function(){return myFunction();})();"
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],
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@ -1039,7 +1051,7 @@
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"We can use <code>if</code> statements in JavaScript to only execute code if a certain condition is met.",
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"<code>if</code> statements require some sort of boolean condition to evaluate.",
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"For example:",
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"<code> if (1 === 2) {</code>",
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"<code>if (1 === 2) {</code>",
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"<code>  return true;</code>",
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"<code>} else {</code>",
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"<code>  return false;</code>",
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@ -1056,16 +1068,15 @@
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"challengeSeed": [
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"var flip = Math.floor(Math.random() * (1 - 0 + 1)) + 0;",
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"function myFunction(){",
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" // Create an if-else statement here to return \"heads\" if flip is 0. Otherwise return \"tails\".",
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"",
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" // Only change code below this line.",
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"",
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"",
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"",
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" // Only change code above this line.",
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"",
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"}",
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"",
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"// We use this function to show you the value of your variable in your output box.",
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"var result = myFunction();if(typeof(flip) !== \"undefined\" && typeof(flip) === \"number\" && typeof(result) !== \"undefined\" && typeof(result) === \"string\"){(function(y,z){return 'flip = ' + y.toString() + ', text = ' + z;})(flip, result);}"
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],
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"type": "waypoint",
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@ -1082,22 +1093,24 @@
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"<code>g</code> means that we want to search the entire string for this pattern instead of just the first match.",
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"<code>i</code> means that we want to ignore the case (uppercase or lowercase) when searching for the pattern.",
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"<code>Regular expressions</code> are written by surrounding the pattern with <code>/</code> symbols.",
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"Let's try selecting all the occurrences of the word <code>and</code> in the string <code>Ada Lovelace and Charles Babbage designed the first computer and the software that would have run on it</code>. We can do this by replacing the <code>.</code> part of our regular expression with the current <code>regular expression</code> with the word <code>and</code>."
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"Let's try selecting all the occurrences of the word <code>and</code> in the string <code>Ada Lovelace and Charles Babbage designed the first computer and the software that would have run on it</code>.",
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"We can do this by replacing the <code>.</code> part of our regular expression with the current <code>regular expression</code> with the word <code>and</code>."
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],
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"tests": [
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"assert(test==2, 'message: Your <code>regular expression</code> should find two occurrences of the word <code>and</code>.');",
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"assert(editor.getValue().match(/\\/and\\/gi/), 'message: You should have used <code>regular expressions</code> to find the word <code>and</code>.');"
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"assert(editor.getValue().match(/\\/and\\/gi/), 'message: Use <code>regular expressions</code> to find the word <code>and</code> in <code>testString</code>.');"
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],
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"challengeSeed": [
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"var test = (function() {",
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" var testString = \"Ada Lovelace and Charles Babbage designed the first computer and the software that would have run on it.\";",
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" var expressionToGetSoftware = /software/gi;",
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"",
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" // Only change code below this line.",
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"",
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" var expression = /./gi;",
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"",
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" // Only change code above this line.",
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" // We use this function to show you the value of your variable in your output box.",
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"",
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" return testString.match(expression).length;",
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"})();(function(){return test;})();"
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],
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@ -1115,11 +1128,12 @@
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"Use the <code>\\d</code> selector to select the number of numbers in the string, allowing for the possibility of multi-digit numbers."
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],
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"tests": [
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"assert(test === 2, 'message: Your RegEx should have found two numbers in the <code>testString</code>.');",
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"assert(editor.getValue().match(/\\/\\\\d\\+\\//g), 'message: You should be using the following expression <code>/\\d+/g</code> to find the numbers in the <code>testString</code>.');"
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"assert(editor.getValue().match(/\\/\\\\d\\+\\//g), 'message: Use the <code>/\\d+/g</code> regular expression to find the numbers in <code>testString</code>.');",
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"assert(test === 2, 'message: Your regular expression should find two numbers in <code>testString</code>.');"
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],
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"challengeSeed": [
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"var test = (function() {",
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"",
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" var testString = \"There are 3 cats but 4 dogs.\";",
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"",
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" // Only change code below this line.",
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@ -1127,8 +1141,9 @@
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" var expression = /.+/g;",
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"",
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" // Only change code above this line.",
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" // We use this function to show you the value of your variable in your output box.",
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"",
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" return testString.match(expression).length;",
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"",
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"})();(function(){return test;})();"
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],
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"type": "waypoint",
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@ -1138,15 +1153,15 @@
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"id": "cf1111c1c12feddfaeb8bdef",
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"title": "Find Whitespace with Regular Expressions",
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"description": [
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"We can also use selectors like <code>\\s</code> to find whitespace in a string.",
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"The whitespace characters are <code>\" \"</code> (space), <code>\\r</code> (carriage return), <code>\\n</code> (newline), <code>\\t</code> (tab), and <code>\\f</code> (form feed).",
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"It is used like this:",
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"We can also use regular expression selectors like <code>\\s</code> to find whitespace in a string.",
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"The whitespace characters are <code>\" \"</code> (space), <code>\\r</code> (the carriage return), <code>\\n</code> (newline), <code>\\t</code> (tab), and <code>\\f</code> (the form feed).",
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"The whitespace regular expression looks like this:",
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"<code>/\\s+/g</code>",
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"Select all the whitespace characters in the sentence string."
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"Use it to select all the whitespace characters in the sentence string."
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],
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"tests": [
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"assert(test === 7, 'message: Your RegEx should have found seven spaces in the <code>testString</code>.');",
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"assert(editor.getValue().match(/\\/\\\\s\\+\\//g), 'message: You should be using the following expression <code>/\\s+/g</code> to find the spaces in the <code>testString</code>.');"
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"assert(editor.getValue().match(/\\/\\\\s\\+\\//g), 'message: Use the <code>/\\s+/g</code> regular expression to find the spaces in <code>testString</code>.');",
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"assert(test === 7, 'message: Your regular expression should find seven spaces in <code>testString</code>.');"
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],
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"challengeSeed": [
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"var test = (function(){",
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@ -1157,8 +1172,9 @@
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" var expression = /.+/g;",
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"",
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" // Only change code above this line.",
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" // We use this function to show you the value of your variable in your output box.",
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"",
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" return testString.match(expression).length;",
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"",
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"})();(function(){return test;})();"
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],
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"type": "waypoint",
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@ -1168,12 +1184,13 @@
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"id": "cf1111c1c13feddfaeb3bdef",
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"title": "Invert Regular Expression Matches with JavaScript",
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"description": [
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"Use <code>/\\S/g</code> to match everything that isn't a space in the string.",
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"You can invert any match by using the uppercase version of the selector <code>\\s</code> versus <code>\\S</code> for example."
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"You can invert any match by using the uppercase version of the regular expression selector.",
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"For example, <code>\\s</code> will match any whitespace, and <code>\\S</code> will match anything that isn't whitespace.",
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"Use <code>/\\S/g</code> to count the number of non-whitespace characters in <code>testString</code>.",
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],
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"tests": [
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"assert(test === 49, 'message: Your RegEx should have found forty nine non-space characters in the <code>testString</code>.');",
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"assert(editor.getValue().match(/\\/\\\\S\\/g/g), 'message: You should be using the following expression <code>/\\S/g</code> to find non-space characters in the <code>testString</code>.');"
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"assert(editor.getValue().match(/\\/\\\\S\\/g/g), 'message: Use the <code>/\\S/g</code> regular expression to find non-space characters in <code>testString</code>.');",
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"assert(test === 49, 'message: Your regular expression should find forty nine non-space characters in the <code>testString</code>.');"
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],
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"challengeSeed": [
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"var test = (function(){",
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@ -1184,7 +1201,7 @@
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" var expression = /./g;",
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"",
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" // Only change code above this line.",
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" // We use this function to show you the value of your variable in your output box.",
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"",
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" return testString.match(expression).length;",
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"})();(function(){return test;})();"
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],
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{
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"id":"cf1111c1c15feddfaeb1bdef",
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"title": "Declare JavaScript Objects as Variables",
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"difficulty":0,
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"description":[
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"Before we dive into Object Oriented Programming, let's revisit JavaScript objects.",
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"Give your <code>motorBike</code> object a <code>wheels</code>, <code>engines</code> and <code>seats</code> attribute and set them to numbers."
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"assert(typeof(motorBike.seats) === 'number', 'message: <code>motorBike</code> should have a <code>seats</code> attribute set to a number.');"
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],
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"challengeSeed":[
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"//Here is a sample Object",
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"var car = {",
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" \"wheels\":4,",
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" \"engines\":1,",
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" \"seats\":5",
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"};",
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"",
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"//Now Let's make a similar Object called motorBike",
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"//Give it two wheels, one engine and one seat",
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"var motorBike = {",
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"",
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" // Only change code below this line.",
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"",
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"",
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"",
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" // Only change code above this line.",
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"",
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"};",
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"",
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"(function() {return JSON.stringify(motorBike);})();"
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{
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"id":"cf1111c1c15feddfaeb2bdef",
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"title": "Construct JavaScript Objects with Functions",
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"difficulty":0,
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"description":[
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"We are also able to create objects using <code>constructor</code> functions.",
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"Here's an example of a constructor function:",
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"<code>var Car = function() {</code>",
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"<code>  this.wheels = 4;</code>",
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"<code>  this.engines = 1;</code>",
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"<code>  this.seats = 1;</code>",
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"<code>};</code>",
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"Give your <code>myMotorBike</code> object a <code>wheels</code>, <code>engines</code> and <code>seats</code> attribute and set them to numbers."
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],
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"tests":[
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@ -63,7 +66,6 @@
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"assert(typeof((new MotorBike()).seats) === 'number', 'message: <code>myMotorBike</code> should have a <code>seats</code> attribute set to a number.');"
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],
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"challengeSeed":[
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"// Let's add the properties engines and seats to the car in the same way that the property wheels has been added below. They should both be numbers.",
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"var Car = function() {",
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" this.wheels = 4;",
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" this.engines = 1;",
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@ -73,6 +75,7 @@
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"var myCar = new Car();",
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"",
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"// Only change code below this line.",
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"",
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"var MotorBike = function() {",
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"",
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"",
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@ -80,6 +83,7 @@
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"};",
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"",
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"var myMotorBike = new MotorBike();",
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"",
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"// Only change code above this line.",
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"",
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"(function() {return JSON.stringify(myMotorBike);})();"
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@ -90,12 +94,12 @@
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{
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"id":"cf1111c1c15feddfaeb3bdef",
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"title":"Make Object Properties Private",
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"difficulty":0,
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"description":[
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"Objects have their own attributes, called <code>properties</code>, and their own functions, called <code>methods</code>.",
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"In the previous challenge, we used the <code>this</code> keyword to reference <code>public properties</code> and <code>public methods</code> of the current object.",
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"We can also create <code>private properties</code> and <code>private methods</code>, which aren't accessible from outside the object.",
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"To do this, we omit the word <code>this</code> from the <code>property</code> or <code>method</code> declaration.",
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"Let's create an object with two functions. One attached as a property and one not.",
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"See if you can keep <code>myBike.speed</code> and <code>myBike.addUnit</code> private, while making <code>myBike.getSpeed</code> publicly accessible."
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],
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"tests":[
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@ -104,7 +108,6 @@
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"assert(typeof(myBike.addUnit) === 'undefined', 'message: <code>myBike.addUnit</code> should remain undefined.');"
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],
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"challengeSeed":[
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"//Let's create an object with two functions. One attached as a property and one not.",
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"var Car = function() {",
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" this.gear = 1;",
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" function addStyle(styleMe){",
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@ -116,7 +119,9 @@
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"};",
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"",
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"var Bike = function() {",
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"",
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" // Only change code below this line.",
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"",
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" this.speed = 100;",
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" function addUnit(value) {",
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" return value + \"KM/H\";",
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@ -125,11 +130,13 @@
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" getSpeed = function () {",
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" return addUnit(speed);",
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" };",
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" ",
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"",
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"};",
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"",
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"// Only change code above this line.",
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"",
|
||||
"var myCar = new Car();",
|
||||
"",
|
||||
"var myBike = new Bike();",
|
||||
"",
|
||||
"if(myBike.hasOwnProperty('getSpeed')){(function() {return JSON.stringify(myBike.getSpeed());})();};"
|
||||
@ -140,7 +147,6 @@
|
||||
{
|
||||
"id":"cf1111c1c15feddfaeb4bdef",
|
||||
"title":"Make Instances of Objects with a Constructor Function",
|
||||
"difficulty":0,
|
||||
"description":[
|
||||
"Sometimes you'll want to be able to easily create similar objects.",
|
||||
"Objects have their own attributes, called <code>properties</code>, and their own functions, called <code>methods</code>.",
|
||||
@ -164,7 +170,6 @@
|
||||
"// Only change code below this line.",
|
||||
"var myCar = new Car();",
|
||||
"",
|
||||
"//Add the property \"engines\" to myCar, and make it a number.",
|
||||
"",
|
||||
"",
|
||||
"// Only change code above this line.",
|
||||
@ -176,7 +181,6 @@
|
||||
{
|
||||
"id":"cf1111c1c15feddfaeb7bdef",
|
||||
"title":"Iterate over Arrays with .map",
|
||||
"difficulty":0,
|
||||
"description":[
|
||||
"The map method is one of the easiest ways to iterate through an array or object there is. Let's use it now.",
|
||||
"<code>array = array.map(function(val){</code>",
|
||||
@ -191,13 +195,14 @@
|
||||
"assert(editor.getValue().match(/\\[1\\,2\\,3\\,4\\,5\\]/gi), 'message: You should only modify the array with <code>.map</code>.');"
|
||||
],
|
||||
"challengeSeed":[
|
||||
"//Use map to add three to each value in the array",
|
||||
"var array = [1,2,3,4,5];",
|
||||
"",
|
||||
"// Only change code below this line.",
|
||||
"",
|
||||
"",
|
||||
"",
|
||||
"// Only change code above this line.",
|
||||
"",
|
||||
"(function() {return array;})();"
|
||||
],
|
||||
"MDNlinks":[
|
||||
@ -209,7 +214,6 @@
|
||||
{
|
||||
"id":"cf1111c1c15feddfaeb8bdef",
|
||||
"title":"Condense arrays with .reduce",
|
||||
"difficulty":0,
|
||||
"description":[
|
||||
"Reduce can be useful for condensing an array of numbers into one value.",
|
||||
"<code>var singleVal = array.reduce(function(previousVal, currentVal){</code>",
|
||||
@ -223,12 +227,15 @@
|
||||
],
|
||||
"challengeSeed":[
|
||||
"var array = [4,5,6,7,8];",
|
||||
"",
|
||||
"var singleVal = 0;",
|
||||
"",
|
||||
"// Only change code below this line.",
|
||||
"",
|
||||
"",
|
||||
"",
|
||||
"// Only change code above this line.",
|
||||
"",
|
||||
"(function() {return singleVal;})();"
|
||||
],
|
||||
"MDNlinks":[
|
||||
@ -240,7 +247,6 @@
|
||||
{
|
||||
"id":"cf1111c1c15feddfaeb9bdef",
|
||||
"title":"Filter Arrays with .filter",
|
||||
"difficulty":0,
|
||||
"description":[
|
||||
"Filter is a useful method that can filter out values that don't match a certain criteria",
|
||||
"Let's remove all the values greater than five",
|
||||
@ -255,11 +261,13 @@
|
||||
],
|
||||
"challengeSeed":[
|
||||
"var array = [1,2,3,4,5,6,7,8,9,10];",
|
||||
" // Only change code below this line.",
|
||||
"",
|
||||
"// Only change code below this line.",
|
||||
"",
|
||||
"",
|
||||
"",
|
||||
" // Only change code above this line.",
|
||||
"// Only change code above this line.",
|
||||
"",
|
||||
"(function() {return array;})();"
|
||||
],
|
||||
"MDNlinks":[
|
||||
@ -271,7 +279,6 @@
|
||||
{
|
||||
"id":"cf1111c1c16feddfaeb1bdef",
|
||||
"title": "Sort Arrays with .sort",
|
||||
"difficulty":0,
|
||||
"description":[
|
||||
"You can use the method <code>sort</code> to easily sort the values in the array alphabetically or numerically.",
|
||||
"<code>var array = [1, 3, 2];</code>",
|
||||
@ -286,11 +293,13 @@
|
||||
],
|
||||
"challengeSeed":[
|
||||
"var array = ['beta', 'alpha', 'charlie'];",
|
||||
"",
|
||||
"// Only change code below this line.",
|
||||
"",
|
||||
"",
|
||||
"",
|
||||
" // Only change code above this line.",
|
||||
"// Only change code above this line.",
|
||||
"",
|
||||
"(function() {return array;})();"
|
||||
],
|
||||
"MDNlinks":[
|
||||
@ -313,11 +322,13 @@
|
||||
],
|
||||
"challengeSeed": [
|
||||
"var array = [1,2,3,4,5,6,7];",
|
||||
" // Only change code below this line.",
|
||||
"",
|
||||
"// Only change code below this line.",
|
||||
"",
|
||||
"",
|
||||
"",
|
||||
" // Only change code above this line.",
|
||||
"// Only change code above this line.",
|
||||
"",
|
||||
"(function() {return array;})();"
|
||||
],
|
||||
"MDNlinks":[
|
||||
@ -343,11 +354,13 @@
|
||||
"var array = [1,2,3];",
|
||||
"",
|
||||
"var concatMe = [4,5,6];",
|
||||
"",
|
||||
"// Only change code below this line.",
|
||||
"",
|
||||
"",
|
||||
"",
|
||||
"// Only change code above this line.",
|
||||
"",
|
||||
"(function() {return array;})();"
|
||||
],
|
||||
"MDNlinks":[
|
||||
@ -359,7 +372,6 @@
|
||||
{
|
||||
"id":"cf1111c1c16feddfaeb4bdef",
|
||||
"title":"Split Strings with .split",
|
||||
"difficulty":0,
|
||||
"description":[
|
||||
"You can use the <code>.split()</code> method to split a string into an array.",
|
||||
"<code>.split()</code> uses the argument you pass in as a delimiter to determine which points the string should be split at.",
|
||||
@ -367,16 +379,18 @@
|
||||
"Use <code>.split()</code> to create an array of words from <code>string</code> and assign it to <code>array</code>."
|
||||
],
|
||||
"tests":[
|
||||
"assert(typeof(array) === 'object' && array.length === 5, 'message: You should split the string by its spaces.');",
|
||||
"assert(/\\.split\\(/gi, 'message: You should use the split method on the string.');"
|
||||
"assert(/\\.split\\(/gi, 'message: You should use the split method on the string.');",
|
||||
"assert(typeof(array) === 'object' && array.length === 5, 'message: You should split the string by its spaces.');"
|
||||
],
|
||||
"challengeSeed":[
|
||||
"var string = \"Split me into an array\";",
|
||||
"",
|
||||
"// Only change code below this line.",
|
||||
"",
|
||||
"var array = string;",
|
||||
"",
|
||||
"// Only change code above this line.",
|
||||
"",
|
||||
"(function() {return array;})();"
|
||||
],
|
||||
"MDNlinks":[
|
||||
@ -388,7 +402,6 @@
|
||||
{
|
||||
"id":"cf1111c1c16feddfaeb5bdef",
|
||||
"title":"Join Strings with .join",
|
||||
"difficulty":0,
|
||||
"description":[
|
||||
"We can use the <code>.join()</code> method to join each element in an array into a string separated by whatever delimiter you provide as an argument to the join operation.",
|
||||
"<code>var joinMe = joinMe.join(\" \");</code>",
|
||||
@ -400,11 +413,13 @@
|
||||
],
|
||||
"challengeSeed":[
|
||||
"var joinMe = [\"Split\",\"me\",\"into\",\"an\",\"array\"];",
|
||||
"",
|
||||
"// Only change code below this line.",
|
||||
"",
|
||||
"joinMe = joinMe;",
|
||||
"",
|
||||
"// Only change code above this line.",
|
||||
"",
|
||||
"(function() {return joinMe;})();"
|
||||
],
|
||||
"MDNlinks":[
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user