freeCodeCamp/chunky-monkey.english.md at f1c9b08cf322e4268a0a31ae9b5d75bf3cfce7d1

Oliver Eyton-Williams f1c9b08cf3 fix(curriculum): add isHidden: false to challenges

This includes certificates (where it does nothing), but does not
include any translations.

2020-05-25 16:25:19 +05:30

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id, title, isRequired, challengeType, isHidden, forumTopicId

id	title	isRequired	challengeType	isHidden	forumTopicId
a9bd25c716030ec90084d8a1	Chunky Monkey	true	5	false	16005

Description

Write a function that splits an array (first argument) into groups the length of size (second argument) and returns them as a two-dimensional array.

Instructions

Tests

tests:
  - text: <code>chunkArrayInGroups(["a", "b", "c", "d"], 2)</code> should return <code>[["a", "b"], ["c", "d"]]</code>.
    testString: assert.deepEqual(chunkArrayInGroups(["a", "b", "c", "d"], 2), [["a", "b"], ["c", "d"]]);
  - text: <code>chunkArrayInGroups([0, 1, 2, 3, 4, 5], 3)</code> should return <code>[[0, 1, 2], [3, 4, 5]]</code>.
    testString: assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5], 3), [[0, 1, 2], [3, 4, 5]]);
  - text: <code>chunkArrayInGroups([0, 1, 2, 3, 4, 5], 2)</code> should return <code>[[0, 1], [2, 3], [4, 5]]</code>.
    testString: assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5], 2), [[0, 1], [2, 3], [4, 5]]);
  - text: <code>chunkArrayInGroups([0, 1, 2, 3, 4, 5], 4)</code> should return <code>[[0, 1, 2, 3], [4, 5]]</code>.
    testString: assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5], 4), [[0, 1, 2, 3], [4, 5]]);
  - text: <code>chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6], 3)</code> should return <code>[[0, 1, 2], [3, 4, 5], [6]]</code>.
    testString: assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6], 3), [[0, 1, 2], [3, 4, 5], [6]]);
  - 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>.
    testString: assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6, 7, 8], 4), [[0, 1, 2, 3], [4, 5, 6, 7], [8]]);
  - 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>.
    testString: assert.deepEqual(chunkArrayInGroups([0, 1, 2, 3, 4, 5, 6, 7, 8], 2), [[0, 1], [2, 3], [4, 5], [6, 7], [8]]);

Challenge Seed

function chunkArrayInGroups(arr, size) {
  return arr;
}

chunkArrayInGroups(["a", "b", "c", "d"], 2);

Solution

function chunkArrayInGroups(arr, size) {
  let out = [];

  for (let i = 0; i < arr.length; i += size) {
    out.push(arr.slice(i, i + size));
  }

  return out;
}

chunkArrayInGroups(["a", "b", "c", "d"], 2);

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