pattern match a name from stdin

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hi Monks, Having a few probs with pattern matching. The user is requested to edit a name. This name is then searched against a text and a number retreived.

text file:
1|paul
2|simon
etc
[download]

print "Name:\n";
$file= <stdin>;

open (FH, "names.txt") or die "$!";
while (<FH>) {
             if (m/\|$file$/) { #naturally this does not work
       print "$num_entry\n";
}
[download]

Any suggestions or advice would be great, Thanks

Comment on pattern match a name from stdin Select or Download Code

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Re: pattern match a name from stdin by davido (Cardinal) on Oct 05, 2005 at 15:42 UTC
Try it this way: `use strict; use warnings; print "Name:\n"; my $name = <STDIN>; chomp $name; open( FH, "names.txt" ) or die $!; while( <FH> ) { chomp; if( m/(\d+)\s\\|\s\Q$name\E/ ) { print "$1\n"; } }` [download] Dave	[reply] [d/l]
Re: pattern match a name from stdin by anniyan (Monk) on Oct 05, 2005 at 15:41 UTC
You add chomp($file). `print "$num_entry\n";` Also you are printing $num_entry which is not declared or used anywhere, check it. Curly brace missing in your coding. You coding works fine for me if i add that curly brace. updated Regards, Anniyan (CREATED in HELL by DEVIL to s\|EVILS\|GOODS\|g in WORLD)	[reply] [d/l]
Re: pattern match a name from stdin by JediWizard (Deacon) on Oct 05, 2005 at 15:44 UTC
First: You should probably chomp `$file`. Secod: if `$file` contains any metacharacters, they will need to be escaped (see quotemeta). Third: If you are testing for the presence of a literal sting within another sting you may be better off with index (in which case disregard the use of quotemeta) They say that time changes things, but you actually have to change them yourself. —Andy Warhol	[reply] [d/l] [select]
Re^2: pattern match a name from stdin by Anonymous Monk on Oct 05, 2005 at 15:56 UTC
this now works: `if (m/\\|\Q$file/) {print $num_entry};` [download] However, if i want the match to occur at at the end i would include an addition $ `if (m/\\|\Q$file$/) {print $num_entry};` [download] For example if the user entered Sarah it could output Sarah and Sarah-jane. But this second bit of code doesnt seem to work?	[reply] [d/l] [select]
Re^3: pattern match a name from stdin by japhy (Canon) on Oct 05, 2005 at 16:34 UTC
The \Q is making the '$' match a literal '$'. You want `m/\Q\|$file\E$/`, methinks. Jeff `japhy` Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and `perl` hacker How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart	[reply] [d/l]