node-parse-numeric-range

Parses expressions like 1-10,20-30. Returns an energetic (as opposed to lazy) array.

Supported Expressions

Comprehensive supported expression examples:

What's this useful for? Well, letting users input these sorts of things and then making them programmatically useful.

Usage

First, npm install parse-numeric-range.

var rangeParser = require('parse-numeric-range');
 
var nums = rangeParser.parse('4,6,8-10,12,14..16,18,20...23');
 
console.log("The first " + nums.length + " composite numbers are: " + nums.join(', '));