JavaScript/REGEX: Largest Matching Number in String

Using JavaScript and regular expressions, how can I find the largest number that matches the pattern of having an underscore followed by letters followed by a dash followed by a number?

The pattern should be something like this: /_(\w+)\-(\d+)/g


var xyz = 'Hello World quote_price_standard-1 testing 3 hello_world-5 253 sdfsdf-532 test_standard-123 ghdghdh-932';
alert( Math.max.apply(null, xyz.match(/(\d+)/g)) ); // Should be 123

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skijAsked:
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jmcgOwnerCommented:
I can't imagine how you'd do that with a single regular expression. You can use a regular expression to capture candidate strings, but you'd need a separate bit of code to compare them for largest and pick out the one you want. Can you say more about this criterion? Is it the string with the largest numerical value after the dash or the string with the largest number of characters?
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Mark BullockQA EngineerCommented:
You can use this regular expression. I don't know the javascript.
_[A-Za-z]+-([0-9]+)

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If you want to test the regular expression, I saved it here.
http://regexr.com/3bng7
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Dan CraciunIT ConsultantCommented:
@Mark: you basically rewrote the regexp from the OP...

@skij: try this:
var myString = 'Hello World quote_price_standard-1 testing 3 hello_world-5 253 sdfsdf-532 test_standard-123 ghdghdh-932';
var myRegexp = /_\w+\-(\d+)/g;
var match = myRegexp.exec(myString);
var numbers = [];
while (match != null) {
    numbers.push(match[1]);
    match = myRegexp.exec(myString);
}

alert( Math.max.apply(null, numbers) );

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fiddle: http://jsfiddle.net/7p0npeq9/
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