28 lines
843 B
Markdown
28 lines
843 B
Markdown
---
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title: Date range generator
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tags: date,function,generator
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expertise: advanced
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firstSeen: 2021-06-21T05:00:00-04:00
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---
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Creates a generator, that generates all dates in the given range using the given step.
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- Use a `while` loop to iterate from `start` to `end`, using `yield` to return each date in the range, using the `Date` constructor.
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- Use `Date.prototype.getDate()` and `Date.prototype.setDate()` to increment by `step` days after returning each subsequent value.
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- Omit the third argument, `step`, to use a default value of `1`.
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```js
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const dateRangeGenerator = function* (start, end, step = 1) {
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let d = start;
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while (d < end) {
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yield new Date(d);
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d.setDate(d.getDate() + step);
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}
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};
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```
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```js
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[...dateRangeGenerator(new Date('2021-06-01'), new Date('2021-06-04'))];
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// [ 2021-06-01, 2021-06-02, 2021-06-03 ]
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```
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