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.`.
16 lines
424 B
Markdown
16 lines
424 B
Markdown
### all
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Returns `true` if the provided predicate function returns `true` for all elements in a collection, `false` otherwise.
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Use `Array.prototype.every()` to test if all elements in the collection return `true` based on `fn`.
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Omit the second argument, `fn`, to use `Boolean` as a default.
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```js
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const all = (arr, fn = Boolean) => arr.every(fn);
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```
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```js
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all([4, 2, 3], x => x > 1); // true
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all([1, 2, 3]); // true
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```
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