PHP's log in TypeScript

How to use

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

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

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	log(8723321.4, 7)	8.212871815082147

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

TSTypeScript JSJavaScript TSStandalone TS JSStandalone JS

Copy code

export function log(arg: number, base: number): number {
  //      discuss at: https://locutus.io/php/log/
  // parity verified: PHP 8.3
  //     original by: Onno Marsman (https://twitter.com/onnomarsman)
  //     improved by: Brett Zamir (https://brett-zamir.me)
  //       example 1: log(8723321.4, 7)
  //       returns 1: 8.212871815082147

  return typeof base === 'undefined' ? Math.log(arg) : Math.log(arg) / Math.log(base)
}

export function log(arg, base) {
  //      discuss at: https://locutus.io/php/log/
  // parity verified: PHP 8.3
  //     original by: Onno Marsman (https://twitter.com/onnomarsman)
  //     improved by: Brett Zamir (https://brett-zamir.me)
  //       example 1: log(8723321.4, 7)
  //       returns 1: 8.212871815082147

  return typeof base === 'undefined' ? Math.log(arg) : Math.log(arg) / Math.log(base)
}

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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