freeCodeCamp/drop-it.english.md at 30c61b808bca9938b7edb14a81e6c80f9602f2d0

Oliver Eyton-Williams bd68b70f3d

Feat: hide blocks not challenges (#39504 )

* fix: remove isHidden flag from frontmatter

* fix: add isUpcomingChange

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

* feat: hide blocks not challenges

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

Co-authored-by: Ahmad Abdolsaheb <ahmad.abdolsaheb@gmail.com>

2020-09-03 15:07:40 -07:00

2.3 KiB

Raw Blame History

id, title, isRequired, challengeType, forumTopicId

id	title	isRequired	challengeType	forumTopicId
a5deed1811a43193f9f1c841	Drop it	true	5	16010

Description

Given the array arr, iterate through and remove each element starting from the first element (the 0 index) until the function func returns true when the iterated element is passed through it. Then return the rest of the array once the condition is satisfied, otherwise, arr should be returned as an empty array.

Instructions

Tests

tests:
  - text: <code>dropElements([1, 2, 3, 4], function(n) {return n >= 3;})</code> should return <code>[3, 4]</code>.
    testString: assert.deepEqual(dropElements([1, 2, 3, 4], function(n) {return n >= 3;}), [3, 4]);
  - text: <code>dropElements([0, 1, 0, 1], function(n) {return n === 1;})</code> should return <code>[1, 0, 1]</code>.
    testString: assert.deepEqual(dropElements([0, 1, 0, 1], function(n) {return n === 1;}), [1, 0, 1]);
  - text: <code>dropElements([1, 2, 3], function(n) {return n > 0;})</code> should return <code>[1, 2, 3]</code>.
    testString: assert.deepEqual(dropElements([1, 2, 3], function(n) {return n > 0;}), [1, 2, 3]);
  - text: <code>dropElements([1, 2, 3, 4], function(n) {return n > 5;})</code> should return <code>[]</code>.
    testString: assert.deepEqual(dropElements([1, 2, 3, 4], function(n) {return n > 5;}), []);
  - text: <code>dropElements([1, 2, 3, 7, 4], function(n) {return n > 3;})</code> should return <code>[7, 4]</code>.
    testString: assert.deepEqual(dropElements([1, 2, 3, 7, 4], function(n) {return n > 3;}), [7, 4]);
  - text: <code>dropElements([1, 2, 3, 9, 2], function(n) {return n > 2;})</code> should return <code>[3, 9, 2]</code>.
    testString: assert.deepEqual(dropElements([1, 2, 3, 9, 2], function(n) {return n > 2;}), [3, 9, 2]);

Challenge Seed

function dropElements(arr, func) {
  return arr;
}

dropElements([1, 2, 3], function(n) {return n < 3; });

Solution

function dropElements(arr, func) {
  while (arr.length && !func(arr[0])) {
    arr.shift();
  }
  return arr;
}

2.3 KiB Raw Blame History