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

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id title challengeType videoUrl
adf08ec01beb4f99fc7a68f2 Falsy Bouncer 5

--description--

从数组中删除所有有价值的值。 JavaScript中的Falsy值为false null 0 "" undefinedNaN 。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。

--hints--

bouncer([7, "ate", "", false, 9])应该返回[7, "ate", 9]

assert.deepEqual(bouncer([7, 'ate', '', false, 9]), [7, 'ate', 9]);

bouncer(["a", "b", "c"])应返回["a", "b", "c"]

assert.deepEqual(bouncer(['a', 'b', 'c']), ['a', 'b', 'c']);

bouncer([false, null, 0, NaN, undefined, ""])应返回[]

assert.deepEqual(bouncer([false, null, 0, NaN, undefined, '']), []);

bouncer([1, null, NaN, 2, undefined])应该返回[1, 2]

assert.deepEqual(bouncer([null, NaN, 1, 2, undefined]), [1, 2]);

--solutions--