24 lines
606 B
Markdown
24 lines
606 B
Markdown
---
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title: dropWhile
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tags: array,intermediate
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firstSeen: 2018-01-26T12:23:18+02:00
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lastUpdated: 2020-10-19T18:51:03+03:00
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---
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Removes elements in an array until the passed function returns `true`.
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Returns the remaining elements in the array.
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- Loop through the array, using `Array.prototype.slice()` to drop the first element of the array until the value returned from `func` is `true`.
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- Return the remaining elements.
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```js
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const dropWhile = (arr, func) => {
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while (arr.length > 0 && !func(arr[0])) arr = arr.slice(1);
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return arr;
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};
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```
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```js
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dropWhile([1, 2, 3, 4], n => n >= 3); // [3, 4]
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```
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