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.

const rangeParser = require("parse-numeric-range");
 
const numbers = rangeParser("4,6,8-10,12,14..16,18,20...23");
 
console.log(
  `The first ${numbers.length} composite numbers are: ${numbers.join(", ")}`,
);

ES6

import rangeParser from "parse-numeric-range";
 
const numbers = rangeParser("4,6,8-10,12,14..16,18,20...23");
 
console.log(
  `The first ${numbers.length} composite numbers are: ${numbers.join(", ")}`,
);