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javascript/snippets/times.md

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+---
+title: Iterate n times
+type: snippet
+tags: [function]
+cover: lake-loop
+dateModified: 2020-10-20T11:21:07+03:00
+---
+
+Iterates over a callback `n` times.
+
+- Use `Function.prototype.call()` to call `fn` `n` times or until it returns `false`.
+- Omit the last argument, `context`, to use an `undefined` object (or the global object in non-strict mode).
+
+```js
+const times = (n, fn, context = undefined) => {
+  let i = 0;
+  while (fn.call(context, i) !== false && ++i < n) {}
+};
+```
+
+```js
+var output = '';
+times(5, i => (output += i));
+console.log(output); // 01234
+```