PHP's abs in TypeScript

How to use

Install via yarn add locutus and import: import { abs } from 'locutus/php/math/abs'.

Or with CommonJS: const { abs } = require('locutus/php/math/abs')

Use a bundler that supports tree-shaking so you only ship the functions you actually use. Vite, webpack, Rollup, and Parcel all handle this. For server-side use this is less of a concern.

Examples

These examples are extracted from test cases that automatically verify our functions against their native counterparts.

#	code	expected result
1	abs(4.2)	4.2
2	abs(-4.2)	4.2
3	abs(-5)	5
4	abs('_argos')	0

Here's what our current TypeScript equivalent to PHP's abs looks like.

TSTypeScript JSJavaScript TSStandalone TS JSStandalone JS

Copy code

export function abs(mixedNumber: string | number): number {
  //  discuss at: https://locutus.io/php/abs/
  // original by: Waldo Malqui Silva (https://waldo.malqui.info)
  // improved by: Karol Kowalski
  // improved by: Kevin van Zonneveld (https://kvz.io)
  // improved by: Jonas Raoni Soares Silva (https://www.jsfromhell.com)
  //   example 1: abs(4.2)
  //   returns 1: 4.2
  //   example 2: abs(-4.2)
  //   returns 2: 4.2
  //   example 3: abs(-5)
  //   returns 3: 5
  //   example 4: abs('_argos')
  //   returns 4: 0

  return Math.abs(Number(mixedNumber)) || 0
}

export function abs(mixedNumber) {
  //  discuss at: https://locutus.io/php/abs/
  // original by: Waldo Malqui Silva (https://waldo.malqui.info)
  // improved by: Karol Kowalski
  // improved by: Kevin van Zonneveld (https://kvz.io)
  // improved by: Jonas Raoni Soares Silva (https://www.jsfromhell.com)
  //   example 1: abs(4.2)
  //   returns 1: 4.2
  //   example 2: abs(-4.2)
  //   returns 2: 4.2
  //   example 3: abs(-5)
  //   returns 3: 5
  //   example 4: abs('_argos')
  //   returns 4: 0

  return Math.abs(Number(mixedNumber)) || 0
}

Improve this function

Locutus is a community effort following The McDonald's Theory: we ship first iterations, hoping others will improve them. If you see something that could be better, we'd love your contribution.

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