how to extract two characters from a string in javascript

Question

I tried to extract 'US' from the following string, but it returns null, any idea? Thanks

console.log('sample sample 1234 (US)'.match(/\(W{2}\)$/))

It should be \w{2} or better [A-Z]{2}

Wiktor Stribiżew
– Wiktor Stribiżew

2016-11-04 09:42:57 +00:00
Commented Nov 4, 2016 at 9:42 — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Nov 4, 2016 at 9:42

Wiktor Stribiżew · Accepted Answer · 2016-11-04 09:56:55Z

1

W matches a letter W. It should be \w{2} or better [A-Z]{2}. Capture it with (...) and access the 1st captured value:

console.log('sample sample 1234 (US)'.match(/\(([A-Z]{2})\)$/)[1]);
// Or, with error checking
let m = 'sample sample 1234 (US)'.match(/\(([A-Z]{2})\)$/);
let res = m ? m[1] : "";
console.log(res)

If you do not want to access the contents of the capturing group, you need to post-process the results of /$[A-Z]{2}$$/ regex:

let m = 'sample sample 1234 (US)'.match(/\([A-Z]{2}\)$/);
let res = m[0].substring(1, m[0].length-1) || "";
console.log(res);

edited Nov 4, 2016 at 9:56

answered Nov 4, 2016 at 9:44

Wiktor Stribiżew

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4 Comments

AngeloC Over a year ago

thanks, two approaches all works, it returns '(US)', if I want only the 'US'?

Wiktor Stribiżew Over a year ago

What do you mean by "it returns (US)"? See the console output. I added a third approach, please be specific.

AngeloC Over a year ago

i meant if I can get only 'US' without parentheses

Wiktor Stribiżew Over a year ago

All my "3" (actually, 2) approaches get you the US without parentheses. Show all relevant code to see if you have other issues there.

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