0b700b5f78
* fix(learn): clarify description for finders keepers Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com> Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
1.4 KiB
1.4 KiB
id, title, isRequired, challengeType, isHidden, forumTopicId
| id | title | isRequired | challengeType | isHidden | forumTopicId |
|---|---|---|---|---|---|
| a6e40f1041b06c996f7b2406 | Finders Keepers | true | 5 | false | 16016 |
Description
Create a function that looks through an array arr and returns the first element in it that passes a 'truth test'. This means that given an element x, the 'truth test' is passed if func(x) is true. If no element passes the test, return undefined.
Instructions
Tests
tests:
- 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);
- 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);
Challenge Seed
function findElement(arr, func) {
let num = 0;
return num;
}
findElement([1, 2, 3, 4], num => num % 2 === 0);
Solution
function findElement(arr, func) {
return arr.filter(func)[0];
}
findElement([1, 2, 3, 4], num => num % 2 === 0);