freeCodeCamp/finders-keepers.md at 41b7a331008a97d20155c3752b3beb530375ab99

Oliver Eyton-Williams 41b7a33100

fix: replace .chinese.md extension with .md

2020-09-29 22:09:05 +02:00

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id, title, challengeType, videoUrl, localeTitle

id	title	challengeType	videoUrl	localeTitle
a6e40f1041b06c996f7b2406	Finders Keepers	5		Finders Keepers

Description

创建一个查看数组（第一个参数）的函数，并返回数组中传递真值测试的第一个元素（第二个参数）。如果没有元素通过测试，则返回undefined。如果卡住，请记得使用Read-Search-Ask 。尝试配对程序。编写自己的代码。

Instructions

Tests

tests:
  - text: '<code>findElement([1, 3, 5, 8, 9, 10], function(num) { return num % 2 === 0; })</code>应该返回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>应返回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

// solution required

/section>

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