# Get all arrays of consecutive elements

Slide a window of a given size across an array.

Canonical: https://1loc.dev/array/get-all-arrays-of-consecutive-elements/
Version: 1.0.0
Runtime: JavaScript · Node.js 22 / modern browsers
Verification: Local fixtures; no external services
Updated: 2026-10-28

## Implementation

```javascript
function windows({ values, size }) { return size > values.length ? [] : values.slice(size - 1).map((_, i) => values.slice(i, i + size)); }
```

## Input

```json
{
  "values": [
    1,
    2,
    3,
    4
  ],
  "size": 2
}
```

## Expected output

```json
[
  [
    1,
    2
  ],
  [
    2,
    3
  ],
  [
    3,
    4
  ]
]
```

## Edge case

Input:
```json
{
  "values": [
    1,
    2
  ],
  "size": 3
}
```
Output:
```json
[]
```

## Limits

- A window larger than the array yields no windows.

The lab validates types and size before calling this function. Add equivalent validation at your own trust boundary.

## Source and license

Original: https://github.com/phuocng/1loc/blob/14b481cf60dff1620ab1bb99a43b1f68068cdd9b/contents/get-all-arrays-of-consecutive-elements.mdx
Author: Nguyen Huu Phuoc and original contributors
Contributors: See original repository history
Source commit: 14b481cf60dff1620ab1bb99a43b1f68068cdd9b
Copyright (c) 2020 phuoc-ng
License: MIT — https://1loc.dev/licenses/
Maintainer: Oveyon
Modifications: Curated implementation; explicit input contract, edge case and limits. Original MDX retained as inert source evidence.