py-range

Lightweight implementation of Python's range( a, b, [step] ).

Install

$ npm install py-range

https://www.npmjs.com/package/py-range

Usage

const range = require( "py-range" );

range( 5 );
//=> [ 0, 1, 2, 3, 4 ]

range( 5, 12 );
//=> [ 5, 6, 7, 8, 9, 10, 11 ]

range( 5, 12, 2 );
//=> [ 5, 7, 9, 11 ]

range( 12, 5, -2 );
//=> [ 12, 10, 8, 6 ]

API

range( a, b, [step] )

Returns array with values from a to b in steps and requires a < b.

a

Type: number

Specifies start of range. Returned array will start with a.

range( 1, 3 );
//=> [ 1, 2 ]

Can be omited if zero:

range( 5 );
// Instead of
range( 0, 5 );

Omiting a can't be used with step.

b

Type: number

Specifies end of range. Return array will end with b - 1.

range( 1, 3 );
//=> [ 1, 2 ]

[step]

Optional

Type: number

Default: 1

Specifies step of range.

range( 5, 12, 2 );
//=> [ 5, 7, 9, 11 ]

Can be negative, which requires a > b.

range( 12, 5, -2 );
//=> [ 12, 10, 8, 6 ]

Test

$ npm run test

License

MIT © Jonathan Neidel