25 lines
625 B
Markdown
25 lines
625 B
Markdown
---
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title: remove
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tags: array,intermediate
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---
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Mutates an array by removing elements for which the given function returns `false`.
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Use `Array.prototype.filter()` to find array elements that return truthy values and `Array.prototype.reduce()` to remove elements using `Array.prototype.splice()`.
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The `func` is invoked with three arguments (`value, index, array`).
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```js
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const remove = (arr, func) =>
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Array.isArray(arr)
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? arr.filter(func).reduce((acc, val) => {
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arr.splice(arr.indexOf(val), 1);
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return acc.concat(val);
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}, [])
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: [];
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```
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```js
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remove([1, 2, 3, 4], n => n % 2 === 0); // [2, 4]
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```
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