8ee50178f3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
18 lines
540 B
Markdown
18 lines
540 B
Markdown
### dropRightWhile
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Removes elements from the end of an array until the passed function returns `true`. Returns the remaining elements in the array.
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Loop through the array, using `Array.prototype.slice()` to drop the last element of the array until the returned value from the function is `true`.
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Returns the remaining elements.
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```js
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const dropRightWhile = (arr, func) => {
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while (arr.length > 0 && !func(arr[arr.length - 1])) arr = arr.slice(0, -1);
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return arr;
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};
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```
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```js
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dropRightWhile([1, 2, 3, 4], n => n < 3); // [1, 2]
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```
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