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.`.
14 lines
350 B
Markdown
14 lines
350 B
Markdown
### findLast
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Returns the last element for which the provided function returns a truthy value.
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Use `Array.prototype.filter()` to remove elements for which `fn` returns falsey values, `Array.prototype.pop()` to get the last one.
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```js
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const findLast = (arr, fn) => arr.filter(fn).pop();
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```
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```js
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findLast([1, 2, 3, 4], n => n % 2 === 1); // 3
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```
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