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Matching pattern in PERL

Posted on 2008-10-10
Last Modified: 2012-05-05
 I need to verify a string from the command line in a PERL script.  I  need to make sure that the string has the following format:

ABS <A-Z><A-Z><A-Z> <0-9>.<0-9>.<0-9> <A-Z><number> <A-Z><number>

here is a sample:

ABS MSI 9.8.5 A209 B203
ABS HGF 9.8.5 A1234 B6456

i.e. of not valid strings:

SABS MSI 9.8.5 A209 B203
ABS HGF 19.8.5 A1234 B6456
ABS MSI 9.84.5 A209 B203
ABS HGF 9.85.5 A1234 B6456
ABS MSI 9.8.5 A209 B203D
ABS HGF 9.8.5 AB1234 B6456

(in words: ABS 3 letters, space, number.number.number letternumber letternumber)
String needs to start with ABS, then the rest of the sequence.

This is what I was trying but it is not working:
($LABEL =~ /^ABS [A-Z][A-Z][A-Z] [0-9]\.[0-9]\.[0-9] A[0-9][0-9][0-9] B[0-9][0-9][0-9]/))

Question by:atoncelli
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LVL 84

Accepted Solution

ozo earned 250 total points
ID: 22688600
/^ABS [A-Z][A-Z][A-Z] [0-9]\.[0-9]\.[0-9] A[0-9]+ B[0-9]+$/

Author Comment

ID: 22688703
That works! Thanks

What does the
LVL 39

Expert Comment

ID: 22688806
The + means one or more of what is before it.
The $ at the end means end of line (a $ in the middle will be interpreted as a variable name).
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LVL 39

Expert Comment

ID: 22689573
ozo had answered your original question... the points should have gone to him (or at least a split)

Author Comment

ID: 22689695
Oops!  I didn't noticed.  Very sorry about that.
 Is there a way to go back and fix it?
LVL 39

Expert Comment

ID: 22690925
You'll have to post a question in community support referring to this question.  Explain what you want, and they will help you.

Author Comment

ID: 22692056
I did that.
LVL 84

Expert Comment

ID: 22692776
perldoc perlre

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