Takes a string, such as "1,2,3-10,5-8" and turns it into an array of numbers
npm install parse-numeric-rangenode-parse-numeric-range
========================
Parses expressions like 1-10,20-30. Returns an energetic (as opposed to lazy) array.
| Expression | result |
|:----------:|:------------:|
| | [] |
| 1 | [1] |
| 1,2 | [1,2] |
| -10 | [-10] |
| -3,-3 |[-3, -3] |
| -1-2,-2 |[-1,0,1,2,-2] |
| -1--2 |[-1,-2] |
| -1..2,-2 |[-1,0,1,2,-2] |
| -1...3,-2 |[-1,0,1,2,-2] |
| 1⋯3 |[1,2] |
| 1…3 |[1,2] |
| 1‥3 |[1,2,3] |
What's this useful for? Well, letting users input these sorts of things and then
making them programmatically useful.
First, npm install parse-numeric-range.
``javascript
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(", ")},`
);
jsx
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(", ")},
);
``