15 lines
391 B
Markdown
15 lines
391 B
Markdown
---
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title: reject
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tags: array,beginner
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---
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Takes a predicate and array, like `Array.prototype.filter()`, but only keeps `x` if `pred(x) === false`.
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```js
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const reject = (pred, array) => array.filter((...args) => !pred(...args));
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```
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```js
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reject(x => x % 2 === 0, [1, 2, 3, 4, 5]); // [1, 3, 5]
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reject(word => word.length > 4, ['Apple', 'Pear', 'Kiwi', 'Banana']); // ['Pear', 'Kiwi']
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``` |