26 lines
569 B
Markdown
26 lines
569 B
Markdown
---
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title: Iterate n times
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type: snippet
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tags: [function]
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cover: lake-loop
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dateModified: 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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