@fav/math.gcd

Calculates the greatest common divisor of two integers.

"fav" is an abbreviation of "favorite" and also the acronym of "for all versions". This package is intended to support all Node.js versions and many browsers as possible. At least, this package supports Node.js >= v0.10 and major Web browsers: Chrome, Firefox, IE11, Edge, Vivaldi and Safari.

Install

To install from npm:

$ npm install --save @fav/math.gcd

NOTE: npm < 2.7.0 does not support scoped package, but old version Node.js supports it. So when you use such older npm, you should download this package from github.com, and move it in node_modules/@fav/math.gcd/ directory manually.

Usage

For Node.js:

var gcd = require('@fav/math.gcd');
gcd(12, 34) // => 2
gcd(12, -34) // => 2
gcd(1, 12) // => 1

gcd(0, 12) // => 1
gcd(0, 0) // => 1

For Web browsers:

<script src="fav.math.gcd.min.js"></script>
<script>
var gcd = fav.math.gcd;
gcd(12, 34) // => 2
</script>

API

gcd(x, y) : number

Calculates the greatest common divisor of two integers.

This function assumes that both x and y are integers within Number.MIN_SAFE_INTEGER 〜 Number.MAX_SAFE_INTEGER.

If x or y is 0, this function returns 1.

NOTE: This function doesn't check data types of the arguments, and assumes that they are given as per the specific data types.

Parameters:

| Parameter | Type | Description | |:----------|:------:|:-------------------------------| | x | number | An integer to be calculated. | | y | number | An integer to be calculated. |

Returns:

The greatest common divisor of two integer parameters.

Type: number

Checked

Node.js (4〜)

| Platform | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |:---------:|:------:|:------:|:------:|:------:|:------:|:------:|:------:| | macOS |◯|◯|◯|◯|◯|◯|◯| | Windows10 |◯|◯|◯|◯|◯|◯|◯| | Linux |◯|◯|◯|◯|◯|◯|◯|

io.js (1〜3)

| Platform | 1 | 2 | 3 | |:---------:|:------:|:------:|:------:| | macOS |◯|◯|◯| | Windows10 |◯|◯|◯| | Linux |◯|◯|◯|

Node.js (〜0.12)

| Platform | 0.8 | 0.9 | 0.10 | 0.11 | 0.12 | |:---------:|:------:|:------:|:------:|:------:|:------:| | macOS |◯|◯|◯|◯|◯| | Windows10 |◯|◯|◯|◯|◯| | Linux |◯|◯|◯|◯|◯|

Web browsers

| Platform | Chrome | Firefox | Vivaldi | Safari | Edge | IE11 | |:---------:|:------:|:-------:|:-------:|:------:|:------:|:------:| | macOS |◯|◯ |◯ |◯| -- | -- | | Windows10 |◯|◯ |◯ | -- |◯|◯| | Linux |◯|◯ |◯ | -- | -- | -- |

License

Copyright (C) 2018 Takayuki Sato

This program is free software under MIT License. See the file LICENSE in this distribution for more details.