CODEWITHSUNDEEP
javascriptregex
faressoft
faressoft

Reputation: 19651

How to extract a text using regex?

My Text

1618148163#@#JASSER-PC#-#1125015374#@#anas kayyat#-#1543243035#@#anas kayyat#-#

Result Should Be:

JASSER-PC
anas kayyat
anas kayyat

I am using :

(?<=#@#)(.+)(?=#-#)

But it gives me that :

JASSER-PC#-#1125015374#@#anas kayyat#-#1543243035#@#anas kayyat

Upvotes: 0

Views: 558

Answers (4)

darioo
darioo

Reputation: 47183

I'll give you a non-regex answer, since using regular expressions isn't always appropriate, be it speed or readibility of the regex itself:

function getText(text) {
    var arr = text.split("#@#"); // arr now contains [1618148163,JASSER-PC#-#1125015374,anas kayyat#-#1543243035,anas kayyat#-#]
    var newarr = [];

    for(var i = 0; i < arr.length; i++) {
        var index = arr[i].indexOf("#-#");

        if(index != -1) {  // if an array element doesn't contain "#-#", we ignore it
            newarr.push(arr[i].substring(0, index));    
        }
    }

    return newarr;
}

Now, using

getText("1618148163#@#JASSER-PC#-#1125015374#@#anas kayyat#-#1543243035#@#anas kayyat#-#");

returns what you wanted.

Upvotes: 0

Felix Kling
Felix Kling

Reputation: 816262

JavaScript does not support lookbehinds. Make the quantifier non greedy, and use:

var regex = /#@#(.+?)#-#/g;
var strings = [];
var result;
while ((result = regex.exec(input)) != null) {
  strings.push(result[1]);
}

Upvotes: 0

Mike Tunnicliffe
Mike Tunnicliffe

Reputation: 10762

The group (.+) will match as much as it can (it's "greedy"). To make it find a minimal match you can use (.+?).

Upvotes: 0

Gumbo
Gumbo

Reputation: 655129

JavaScript’s regular expressions don’t support look-behind assertions (i.e. (?<=…) and (?<!…)), so you can’t use that regular expression. But you can use this:

#@#(.+)(?=#-#)

Then just take the matched string of the first group. Additionally, to only match as little as possible, make the + quantifier non-greedy by using +?.

Upvotes: 4

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