CODEWITHSUNDEEP
javascript
ajc
ajc

Reputation: 1725

Splitting a hyphen delimited string with negative numbers or range of numbers

Problem:

--

Input: "ABC-PQR--1-XYZ"

Expected Output: ['ABC', 'PQR', '-1', 'XYZ']

--

Input: "ABC-PQR-7-15-XYZ"

Expected Output: ['ABC', 'PQR', '7-15', 'XYZ']

--

I tried using lookback and lookahead regex. Getting confused. Any pointers?

.split(/(?<=\d)-/);

https://jsfiddle.net/ye5ojhcs/4/

Upvotes: 1

Views: 423

Answers (3)

jdaz
jdaz

Reputation: 6043

Try this:

/-(?=[A-Za-z-]|\d+-\d)/


const str = "ABC-PQR--1-APAC";
const str2 = "ABC-PQR-7-15-XYZ";

const pattern = /-(?=[A-Za-z-]|\d+-\d)/;

const splitt = str.split(pattern);
const splitt2 = str2.split(pattern);

console.log(splitt, splitt2);

Upvotes: 1

tarkh
tarkh

Reputation: 2549

Also this is the simple approach with simple logic:

let str = 'ABC-PQR-7-15-XYZ--3-HH';

// Replace digit groups and minus
str = str.replace(/(\d+)-(\d+)/g, '$1<minus>$2');
str = str.replace(/--/g, '-<minus>');

// Split
let arr = str.split('-');

// Replace markers back
arr = arr.map(val => val = val.replace(/<minus>/, '-'));

// Log
console.log(arr);

Upvotes: 1

Nina Scholz
Nina Scholz

Reputation: 386560

You could match the wanted parts by looking for

  • a range
  • a negative number
  • not minus characters

const split = string => string.match(/\d+-\d+|(?<=-)-\d+|[^-]+/g)

console.log(split("ABC-PQR--1-XYZ"));
console.log(split("ABC-PQR-7-15-XYZ"));
.as-console-wrapper { max-height: 100% !important; top: 0; }

Upvotes: 2

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