# Convert an array of strings to numbers

Map every string with Number.

Canonical: https://1loc.dev/array/convert-an-array-of-strings-to-numbers/
Version: 1.0.0
Runtime: JavaScript · Node.js 22 / modern browsers
Verification: Local fixtures; no external services
Updated: 2026-10-28

## Implementation

```javascript
function toNumbers(values) { return values.map(Number); }
```

## Input

```json
[
  "1",
  "2.5",
  "-3"
]
```

## Expected output

```json
[
  1,
  2.5,
  -3
]
```

## Edge case

Input:
```json
[
  "",
  " 42 "
]
```
Output:
```json
[
  0,
  42
]
```

## Limits

- Number("") is 0 and surrounding spaces are ignored, as the edge case shows. Invalid strings become NaN (null in JSON) — validate user input first.

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/convert-an-array-of-strings-to-numbers.mdx
Author: Nguyen Huu Phuoc and original contributors
Contributors: jonrandy
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.