jrange

The range function of Python implemented using JavaScript.
range(start, end, step)

Install

npm i jrange -S

Usage

• in browser

<script src="/dist/jrange.umd.js"></script>
<script>
  const list = jrange(10);
</script>

• esm

import jrange from 'jrange';

const list = jrange(10, 1, -1);

• CommonJS

const range = require('jrange'); // rename to range

const list = range(1, 100, 2);

arguments

/ | default | required -|-|- start | 0 | no | end | / | yes | step | 1 | no |
range(10) -> range(0, 10, 1)
range(1, 10) -> range(1, 10, 1)

different with python

• In Python, the range function returns a Range Class, while jrange returns an Array.

python

rng = range(0, 10)

print(rng, type(rng))) # range(0, 10) <class 'range'>

# Convert to list
list = list(rng)

javascript

const list = jrange(0, 10)

console.log(Array.isArray(list)) // true

• In Python, if the step is zero, the range function will throw an exception, while jrange will return an empty array.

python

range(1, 10, 0)

# ValueError: range() arg 3 must not be zero

javascript

jrange(1, 10, 0) // return []