CODEWITHSUNDEEP
javascriptregex
Nick
Nick

Reputation: 13

Regex for comma separated 3 letter words

I want to create a regex for exactly 3 letter words only, separated by commas. 3 letter words can be padded with space(at most 1 on each side)

Valid Examples:

ORD
JFK, LAX
ABC,DEF, GHK,REW, ASD

Invalid Examples:

ORDA
OR
ORD,
JFK, LA

I tried the following but couldn't get it to work.

^(?:[A-Z ]+,)*[A-Z ]{3} +$

Upvotes: 1

Views: 655

Answers (3)

Axifive
Axifive

Reputation: 1151

You can do this with the pattern: ^((:? ?[A-Z]{3} ?,)*(?: ?[A-Z]{3} ?))+$

var str = `ORD
JFK, LAX
ABC,DEF, GHK,REW, ASD

ORDA
OR
ORD,
JFK, LA`;

let result =  str.match(/^((:? ?[A-Z]{3} ?,)*(?: ?[A-Z]{3} ?))+$/gm);
document.getElementById('match').innerHTML = result.join('<br>');
<p id="match"></p>

Upvotes: 0

XCS
XCS

Reputation: 28147

Try this: ^([ ]?[A-Z]{3}[ ]?,)*([ ]?[A-Z]{3}[ ]?)+$

https://regex101.com/r/HFeN0D/2/

It matches at least one three letter word (with spaces), preceded by any number of words three letter words with commas after them.

Upvotes: 1

Tim Biegeleisen
Tim Biegeleisen

Reputation: 521249

Try this pattern:

^[A-Z]{3}(?:[ ]?,[ ]?[A-Z]{3})*$

This pattern matches an initial three letter word, followed by two more terms separated by a comma with optional spaces.

Upvotes: 0

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