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pys is a simple(< 1 Kb) javascript library to engance String.substring / Array.slice with python slice style.





pys is a simple(< 1 Kb) javascript library to engance String.substring / Array.slice with python slice style.

In python, we can process string or array with code below:

string = '12345678'
print (string[1:6:2])

Use this library, we can do similar things in javascript.

Build Status npm npm npm

1. Install

npm install pys

2. Import It

  • Script tag.
<script type="text/javascript" src="dist/pys.min.js"></script>
  • ES6 style.
var pys = require('pys');


import pys from 'pys';

3. Usage & API

There is only one API named pys. Below:

// for array
var arr = [1, '2', 3, '4', 5, '6', 7, '8', 9, '0'];

pys(arr)('2:5');  		// [3, '4', 5]
pys(arr)(':-2');  		// [1, '2', 3, '4', 5, '6', 7, '8']
pys(arr)('-2:');  		// [9, '0']
pys(arr)('1:5:2');  	// ['2', '4']
pys(arr)('5:1:-2');  	// ['6', '4']

// for string
var str = '1234567890';
pys(str)('2:5');  		// '345'
pys(str)(':-2');  		// '12345678'
pys(str)('-2:');  		// '90'
pys(str)('1:5:2');  	// '24'
pys(str)('5:1:-2');  	// '64'

4. Test

npm install

npm test