javascript - Extracting numbers from a string using regular expressions - Stack Overflow

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I am clueless about regular expressions, but I know that they're the right tool for what I'm trying to do here: I'm trying to extract a numerical value from a string like this one:

approval=not requested^assignment_group=12345678901234567890123456789012^category=Test^contact_type=phone^

Ideally, I'd extract the following from it: 12345678901234567890123456789012 None of the regexes I've tried have worked. How can I get the value I want from this string?

I am clueless about regular expressions, but I know that they're the right tool for what I'm trying to do here: I'm trying to extract a numerical value from a string like this one:

approval=not requested^assignment_group=12345678901234567890123456789012^category=Test^contact_type=phone^

Ideally, I'd extract the following from it: 12345678901234567890123456789012 None of the regexes I've tried have worked. How can I get the value I want from this string?

• javascript
• regex

Share Follow edited Aug 1, 2012 at 22:25 Brighid McDonnell 4,35344 gold badges3939 silver badges6363 bronze badges asked Jul 9, 2012 at 14:43 OlivierOlivier 13022 gold badges33 silver badges1212 bronze badges 2

• 2 What is the regex you've tried? – gen_Eric Commented Jul 9, 2012 at 14:44
• 1 Is it the only number you'll ever have? – Madara's Ghost Commented Jul 9, 2012 at 14:44

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4 Answers 4

Sorted by: Reset to default 7

This will get all the numbers:

var myValue = /\d+/.exec(myString)

mystr.match(/assignment_group=([^\^]+)/)[1]; //=> "12345678901234567890123456789012"

This will find everything from the end of "assignment_group=" up to the next caret ^ symbol.

Try something like this:

/\^assignment_group=(\d*)\^/

This will get the number for assignment_group.

var str = 'approval=not requested^assignment_group=12345678901234567890123456789012^category=Test^contact_type=phone^',
    regex = /\^assignment_group=(\d*)\^/,
    matches = str.match(regex),
    id = matches !== null ? matches[1] : '';
console.log(id);

If there is no chance of there being numbers anywhere but when you need them, you could just do:

\d+

the \d matches digits, and the + says "match any number of whatever this follows"

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