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How do I eliminate characters in a string?

Posted on 1998-07-24
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Last Modified: 2010-03-05
I have a scalar that is in the form of mixed numbers, characters, and symbols.  I want to process this scalar so that I end up with only the number part.  

Here's an example of what I want to happen.

$before = '12-3 abc 90 def'
$after = '12390'

Any hints on how to do this?
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Question by:tmbb
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6 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 1208746
($after = $before) =~ tr/0-9//cd;
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LVL 5

Expert Comment

by:n0thing
ID: 1208747
or $before =~ s/\D//g;
will remove anything not a digit in $before.
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Author Comment

by:tmbb
ID: 1208748
Both work great!
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LVL 84

Expert Comment

by:ozo
ID: 1208749
which do you want to grade?
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LVL 1

Accepted Solution

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TSchock earned 200 total points
ID: 1208750
$_ =~ s/\D//g;
will remove anything excepts digits
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LVL 5

Expert Comment

by:b2pi
ID: 1208751
tmbb;

Please reject TSchock's answer, and ask either ozo or n0thing to submit a question (You can even split points by posting a 0-point question to the customer service area).

TSchock's answer is either an inadvertent mistake, or a blatant attempt to take someone else's points by hoping that you don't notice that he slipped an answer in there, and get the points from auto-grading
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