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30secondsofcode
2018-08-13 11:23:31 +00:00
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@ -1553,13 +1553,13 @@ initialize2DArray(2, 2, 0); // [[0,0], [0,0]]
Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive with their common difference `step`.
Use `Array.from(Math.ceil((end+1-start)/step))` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range.
Use `Array.from()` to create an array of the desired length, `(end - start + 1)/step`, and a map function to fill it with the desired values in the given range.
You can omit `start` to use a default value of `0`.
You can omit `step` to use a default value of `1`.
```js
const initializeArrayWithRange = (end, start = 0, step = 1) =>
Array.from({ length: Math.ceil((end + 1 - start) / step) }).map((v, i) => i * step + start);
Array.from({ length: Math.ceil((end - start + 1) / step) }, (v, i) => i * step + start);
```
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