freeCodeCamp/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/falsy-bouncer.chinese.md

id	title	isRequired	challengeType	videoUrl	localeTitle
adf08ec01beb4f99fc7a68f2	Falsy Bouncer	true	5		Falsy Bouncer

Description

从数组中删除所有有价值的值。 JavaScript中的Falsy值为false ， null ， 0 ， "" ， undefined和NaN 。提示：尝试将每个值转换为布尔值。如果卡住，请记得使用Read-Search-Ask 。编写自己的代码。

Instructions

Tests

tests:
  - text: '<code>bouncer([7, &quot;ate&quot;, &quot;&quot;, false, 9])</code>应该返回<code>[7, &quot;ate&quot;, 9]</code> 。'
    testString: 'assert.deepEqual(bouncer([7, "ate", "", false, 9]), [7, "ate", 9], "<code>bouncer([7, "ate", "", false, 9])</code> should return <code>[7, "ate", 9]</code>.");'
  - text: '<code>bouncer([&quot;a&quot;, &quot;b&quot;, &quot;c&quot;])</code>应返回<code>[&quot;a&quot;, &quot;b&quot;, &quot;c&quot;]</code> 。'
    testString: 'assert.deepEqual(bouncer(["a", "b", "c"]), ["a", "b", "c"], "<code>bouncer(["a", "b", "c"])</code> should return <code>["a", "b", "c"]</code>.");'
  - text: '<code>bouncer([false, null, 0, NaN, undefined, &quot;&quot;])</code>应返回<code>[]</code> 。'
    testString: 'assert.deepEqual(bouncer([false, null, 0, NaN, undefined, ""]), [], "<code>bouncer([false, null, 0, NaN, undefined, ""])</code> should return <code>[]</code>.");'
  - text: '<code>bouncer([1, null, NaN, 2, undefined])</code>应该返回<code>[1, 2]</code> 。'
    testString: 'assert.deepEqual(bouncer([1, null, NaN, 2, undefined]), [1, 2], "<code>bouncer([1, null, NaN, 2, undefined])</code> should return <code>[1, 2]</code>.");'

Challenge Seed

function bouncer(arr) {
  // Don't show a false ID to this bouncer.
  return arr;
}

bouncer([7, "ate", "", false, 9]);

Solution

// solution required