How to substring Regular expression in JavaScript

Question

I have an input which can have up to 50 ASCII characters with a hidden pattern that I need to find. The pattern is the letter A (case insensitive) followed by 8 digits. Only the first pattern (if exists) needs to be found. So an example input can be lkjs#$9234A12345678*)(&kj

How do I do this in JavaScript?

var input = 'lkjs#$9234A12345678*)(&kj';
var regex = '[Aa][0-9]{8}';
var index = input.search(regex);
if (index >= 0) {
    //found pattern - but how to extract it???
}

you know how long the pattern is so you can use string.substring() — John_C
– John_C, Commented Aug 14, 2014 at 21:17

Denys Séguret · Accepted Answer · 2014-08-14 21:17:15Z

2

You should use match :

var match = input.match(/a\d{8}/i); // yes, that's an equivalent regular expression
if (match) { // if a match is found
     var str = match[0];
     // here you go, str is your "substring"
}

answered Aug 14, 2014 at 21:17

Denys Séguret

384k90 gold badges813 silver badges780 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to substring Regular expression in JavaScript

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related