Pattern Recognition - perl

scorreg · #1 (**permalink**) 09-22-2006

can someone help me with this..
cant for the life of me figure it out..
=~ m!^(/.*)/bin/xx!

specific query > What does m!^ do
> What does the ! at the end do..

apoorvasharma80 · #2 (**permalink**) 09-22-2006

Hi Scorreg,

In perl we most often we use directl pattern matching. This 'm' is nothin but the match operator, often used in conjunction with the bind operator(~).
'^' just signifies the start of the pattern and '!' is delimiter.

You can write the same as ......

=~ {^(/.*)/bin/xx}

Now the 'm' is absent and '{' and '}' are delimiters!!

scorreg · #3 (**permalink**) 09-22-2006

thanks.. man

cbkihong · #4 (**permalink**) 09-23-2006

Quote:

Originally Posted by apoorvasharma80

You can write the same as ......

=~ {^(/.*)/bin/xx}

Now the 'm' is absent and '{' and '}' are delimiters!!

Actually the 'm' is necessary unless '/' is used as delimiter. So, m{} but not {}, as {} means something else in Perl (reference to hash literal).

More UNIX and Linux Forum Topics You Might Find Helpful
Thread	Thread Starter	Forum	Replies	Last Post
Perl Pattern Matching !!! Help	maxmave	Shell Programming and Scripting	0	06-03-2008 07:05 PM
perl pattern matching	zedex	Shell Programming and Scripting	2	09-30-2007 08:29 AM
perl - how do i find out if a file doesn't contain a pattern?	mjays	Shell Programming and Scripting	4	09-19-2007 06:28 AM
perl pattern matching vs. grep	junkmail426	Shell Programming and Scripting	0	09-28-2005 10:40 AM
pattern matching + perl question	Optimus_P	Shell Programming and Scripting	1	12-05-2003 07:43 PM

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes	Rate This Thread
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode	Rate This Thread:


	Powered by