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.`.
15 lines
421 B
Markdown
15 lines
421 B
Markdown
### ary
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Creates a function that accepts up to `n` arguments, ignoring any additional arguments.
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Call the provided function, `fn`, with up to `n` arguments, using `Array.prototype.slice(0,n)` and the spread operator (`...`).
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```js
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const ary = (fn, n) => (...args) => fn(...args.slice(0, n));
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```
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```js
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const firstTwoMax = ary(Math.max, 2);
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[[2, 6, 'a'], [8, 4, 6], [10]].map(x => firstTwoMax(...x)); // [6, 8, 10]
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```
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