PHP's is_float in TypeScript

How to use

Install via yarn add locutus and import: import { is_float } from 'locutus/php/var/is_float'.

Or with CommonJS: const { is_float } = require('locutus/php/var/is_float')

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	is_float(186.31)	true

Notes

• 1.0 is simplified to 1 before it can be accessed by the function, this makes it different from the PHP implementation. We can’t fix this unfortunately.

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

TSTypeScript JSJavaScript TSStandalone TS JSStandalone JS

Copy code

export function is_float(mixedVar: number): boolean {
  //      discuss at: https://locutus.io/php/is_float/
  // parity verified: PHP 8.3
  //     original by: Paulo Freitas
  //     bugfixed by: Brett Zamir (https://brett-zamir.me)
  //     improved by: WebDevHobo (https://webdevhobo.blogspot.com/)
  //     improved by: Rafał Kukawski (https://blog.kukawski.pl)
  //          note 1: 1.0 is simplified to 1 before it can be accessed by the function, this makes
  //          note 1: it different from the PHP implementation. We can't fix this unfortunately.
  //       example 1: is_float(186.31)
  //       returns 1: true

  return +mixedVar === mixedVar && (!isFinite(mixedVar) || !!(mixedVar % 1))
}

export function is_float(mixedVar) {
  //      discuss at: https://locutus.io/php/is_float/
  // parity verified: PHP 8.3
  //     original by: Paulo Freitas
  //     bugfixed by: Brett Zamir (https://brett-zamir.me)
  //     improved by: WebDevHobo (https://webdevhobo.blogspot.com/)
  //     improved by: Rafał Kukawski (https://blog.kukawski.pl)
  //          note 1: 1.0 is simplified to 1 before it can be accessed by the function, this makes
  //          note 1: it different from the PHP implementation. We can't fix this unfortunately.
  //       example 1: is_float(186.31)
  //       returns 1: true

  return +mixedVar === mixedVar && (!isFinite(mixedVar) || !!(mixedVar % 1))
}

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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