25 lines
574 B
Markdown
25 lines
574 B
Markdown
---
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title: times
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tags: function,intermediate
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firstSeen: 2018-01-24T13:50:49+02:00
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lastUpdated: 2020-10-20T11:21:07+03:00
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---
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Iterates over a callback `n` times
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- Use `Function.prototype.call()` to call `fn` `n` times or until it returns `false`.
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- Omit the last argument, `context`, to use an `undefined` object (or the global object in non-strict mode).
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```js
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const times = (n, fn, context = undefined) => {
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let i = 0;
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while (fn.call(context, i) !== false && ++i < n) {}
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};
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```
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```js
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var output = '';
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times(5, i => (output += i));
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console.log(output); // 01234
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```
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