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.`.
19 lines
608 B
Markdown
19 lines
608 B
Markdown
### takeRightWhile
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Removes elements from the end of an array until the passed function returns `true`. Returns the removed elements.
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Loop through the array, using a `for...of` loop over `Array.prototype.keys()` until the returned value from the function is `true`.
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Return the removed elements, using `Array.prototype.reverse()` and `Array.prototype.slice()`.
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```js
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const takeRightWhile = (arr, func) => {
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for (let i of arr.reverse().keys())
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if (func(arr[i])) return arr.reverse().slice(arr.length - i, arr.length);
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return arr;
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};
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```
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```js
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takeRightWhile([1, 2, 3, 4], n => n < 3); // [3, 4]
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```
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