freeCodeCamp/wherefore-art-thou.english.md at da99033b77be807663872c48f8ac0e325ec6f9a7

Mo Zargham 437ba8b103 fix(curriculum): Read-search-ask link now point to correct url as noted in the issue (#37753 )

* fix: broken Read-search-ask link now point to correct url

* fix: changed link to original forum link with more views

* fix: changed http links to correct version

* fix: link in help modal

2019-11-19 19:54:48 -05:00

4.3 KiB

Raw Blame History

id, title, isRequired, challengeType, forumTopicId

id	title	isRequired	challengeType	forumTopicId
a8e512fbe388ac2f9198f0fa	Wherefore art thou	true	5	16092

Description

Make a function that looks through an array of objects (first argument) and returns an array of all objects that have matching name and value pairs (second argument). Each name and value pair of the source object has to be present in the object from the collection if it is to be included in the returned array. For example, if the first argument is [{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }], and the second argument is { last: "Capulet" }, then you must return the third object from the array (the first argument), because it contains the name and its value, that was passed on as the second argument. Remember to use Read-Search-Ask if you get stuck. Write your own code.

Instructions

Tests

tests:
  - text: '<code>whatIsInAName([{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }], { last: "Capulet" })</code> should return <code>[{ first: "Tybalt", last: "Capulet" }]</code>.'
    testString: 'assert.deepEqual(whatIsInAName([{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }], { last: "Capulet" }), [{ first: "Tybalt", last: "Capulet" }]);'
  - text: '<code>whatIsInAName([{ "apple": 1 }, { "apple": 1 }, { "apple": 1, "bat": 2 }], { "apple": 1 })</code> should return <code>[{ "apple": 1 }, { "apple": 1 }, { "apple": 1, "bat": 2 }]</code>.'
    testString: 'assert.deepEqual(whatIsInAName([{ "apple": 1 }, { "apple": 1 }, { "apple": 1, "bat": 2 }], { "apple": 1 }), [{ "apple": 1 }, { "apple": 1 }, { "apple": 1, "bat": 2 }]);'
  - text: '<code>whatIsInAName([{ "apple": 1, "bat": 2 }, { "bat": 2 }, { "apple": 1, "bat": 2, "cookie": 2 }], { "apple": 1, "bat": 2 })</code> should return <code>[{ "apple": 1, "bat": 2 }, { "apple": 1, "bat": 2, "cookie": 2 }]</code>.'
    testString: 'assert.deepEqual(whatIsInAName([{ "apple": 1, "bat": 2 }, { "bat": 2 }, { "apple": 1, "bat": 2, "cookie": 2 }], { "apple": 1, "bat": 2 }), [{ "apple": 1, "bat": 2 }, { "apple": 1, "bat": 2, "cookie": 2 }]);'
  - text: '<code>whatIsInAName([{ "apple": 1, "bat": 2 }, { "apple": 1 }, { "apple": 1, "bat": 2, "cookie": 2 }], { "apple": 1, "cookie": 2 })</code> should return <code>[{ "apple": 1, "bat": 2, "cookie": 2 }]</code>.'
    testString: 'assert.deepEqual(whatIsInAName([{ "apple": 1, "bat": 2 }, { "apple": 1 }, { "apple": 1, "bat": 2, "cookie": 2 }], { "apple": 1, "cookie": 2 }), [{ "apple": 1, "bat": 2, "cookie": 2 }]);'
  - text: '<code>whatIsInAName([{ "apple": 1, "bat": 2 }, { "apple": 1 }, { "apple": 1, "bat": 2, "cookie": 2 }, { "bat":2 }], { "apple": 1, "bat": 2 })</code> should return <code>[{ "apple": 1, "bat": 2 }, { "apple": 1, "bat": 2, "cookie":2 }]</code>.'
    testString: 'assert.deepEqual(whatIsInAName([{ "apple": 1, "bat": 2 }, { "apple": 1 }, { "apple": 1, "bat": 2, "cookie": 2 }, {"bat":2}], { "apple": 1, "bat": 2 }), [{ "apple": 1, "bat": 2 }, { "apple": 1, "bat": 2, "cookie":2 }]);'
  - text: '<code>whatIsInAName([{"a": 1, "b": 2, "c": 3}], {"a": 1, "b": 9999, "c": 3})</code> should return <code>[]</code>'
    testString: 'assert.deepEqual(whatIsInAName([{ "a": 1, "b": 2, "c": 3 }], { "a": 1, "b": 9999, "c": 3 }), []);'

Challenge Seed

function whatIsInAName(collection, source) {
  // What's in a name?
  var arr = [];
  // Only change code below this line


  // Only change code above this line
  return arr;
}

whatIsInAName([{ first: "Romeo", last: "Montague" }, { first: "Mercutio", last: null }, { first: "Tybalt", last: "Capulet" }], { last: "Capulet" });

Solution

function whatIsInAName(collection, source) {
  var arr = [];
  var keys = Object.keys(source);
  collection.forEach(function(e) {
    if(keys.every(function(key) {return e[key] === source[key];})) {
      arr.push(e);
    }
  });
  return arr;
}

4.3 KiB Raw Blame History