Range Life

A range utility that no one asked for.
Supports stepped ranges of integers, decimals, letters, and even a supplied array of values.

"If I had a range life, then I could settle down." - Stephen Malkmus

Installation

$ npm install range-life

Usage

Inclusion

All examples are supported by the default module.
However, you may submodule for specific methods like so.

import rangeNum from 'range-life/standard'
import rangeAlpha from 'range-life/alpha'
import rangeValues from 'range-life/values'

Examples

import range from 'range-life'

range(0) // => []
range(4) // => [0, 1, 2, 3]
range(-4) // => [0, -1, -2, -3]
range(1, 5) // => [1, 2, 3, 4]
range(0, 20, 5) // => [0, 5, 10, 15]
range(0, -4, -1) // => [0, -1, -2, -3]
range(1, 4, 0) // => [1, 1, 1]
range(1, 4, 0.5) // => [1, 1.5, 2, 2.5, 3, 3.5]

// letters are inclusive
range('a', 'e') // => ['a', 'b', 'c', 'd', 'e']
range('A', 'E') // => ['A', 'B', 'C', 'D', 'E']
range('A', 'E', 2) // => ['A', 'C', 'E']

// values are exclusive
const values = ['Zero', 'One', 'Two', 'Three']

range(0, 3, values) // => ['Zero', 'One', 'Two']
range(0, Infinity, 2, values) // => ['Zero', 'Two']

API Reference

range-life/standard

Parameters

• start number
• end number
• step number

Examples

import range from 'range-life/standard'

range(1, 5) // => [1, 2, 3, 4]
range(0, 20, 5) // => [0, 5, 10, 15]

Returns Array<number>

range-life/alpha

Parameters

• start string
• end string
• step number

Examples

import range from 'range-life/alpha'

range('A', 'E') // => ['A', 'B', 'C', 'D', 'E']
range('A', 'E', 2) // => ['A', 'C', 'E']

Returns Array<string>

range-life/values

Parameters

• start string
• end string
• values | step (Array<any> | number)
• values Array<any>

Examples

import range from 'range-life/values'

const values = ['Zero', 'One', 'Two', 'Three']

range(1, 3, values) // => ['One', 'Two']
range(1, Infinity, 2, values) // => ['Zero', 'Two']

Returns Array<any>