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Isabelle Viktoria Maciohsek
2020-10-20 23:02:01 +03:00
parent 52880f08ee
commit caa67e2a49
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snippets/initializeArrayWithRangeRight.md
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@ -1,13 +1,13 @@
---
title: initializeArrayWithRangeRight
tags: array,math,intermediate
tags: array,intermediate
---
Initializes an array containing the numbers in the specified range (in reverse) 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.prototype.map()` to fill with the desired values in a range.
- You can omit `start` to use a default value of `0`.
- You can omit `step` to use a default value of `1`.
- Omit the second argument, `start`, to use a default value of `0`.
- Omit the last argument, `step`, to use a default value of `1`.
```js
const initializeArrayWithRangeRight = (end, start = 0, step = 1) =>
@ -17,7 +17,7 @@ const initializeArrayWithRangeRight = (end, start = 0, step = 1) =>
```
```js
initializeArrayWithRangeRight(5); // [5,4,3,2,1,0]
initializeArrayWithRangeRight(7, 3); // [7,6,5,4,3]
initializeArrayWithRangeRight(9, 0, 2); // [8,6,4,2,0]
initializeArrayWithRangeRight(5); // [5, 4, 3, 2, 1, 0]
initializeArrayWithRangeRight(7, 3); // [7, 6, 5, 4, 3]
initializeArrayWithRangeRight(9, 0, 2); // [8, 6, 4, 2, 0]
```