Re^2: doubt in string matching.

I am affraid your first solution does not seem to work. Pls correct me if I am wrong.
Say ,

my $find="CXYF";
my $string = "ABCDEFGHIJKLMNOPCDEFQRST";
[download]

In this case also, the output will be

'CDEF' string found

Just to correct

#!/usr/bin/perl -w
use strict;

my $string= "ABCDEFGHIJKLMNOPCDEFQRST";
my $find="CDEF";

#extract first and last character
my ($first, $last) = $find =~ /([A-Z])[A-Z]*([A-Z])/;

#check both character present in string
if ($string =~ /$first/ && $string =~ /$last/) {
        
        print "'$find' string found" if ($string =~ /$find/);
}
[download]

This combines your first and second solution. Thanks..

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Re^3: doubt in string matching. by prasadbabu (Prior) on Oct 17, 2006 at 05:50 UTC
Mandrake You are right, if the $find string is "CXYF". But my solution is based on the OP's logic. If the strings are "CDEF", "QRST" etc. it ll work perfectly. The OP has given, i keep incrementing first(after finding C) Prasad	[reply]
Re^4: doubt in string matching. by Mandrake (Chaplain) on Oct 17, 2006 at 06:47 UTC
Sorry but unless you perform a check at each increment, this incrementing does not prove good. Your implementation just checks the first and last characters only. This will return success if `$find = "CDED"; # or $find = "CDEH"; # or $find = "CDEJ"; #or even $find = "CDEC";` [download] Also if you check the pattern closely, BCDEFGHIJKLMNOPCDEFQRST you can find a CDEF in-between the P and Q. So incrementing the string from `$first..$last` should not be the approach here. I believe by "incrementing" what OP meant was incrementing the search string from first to last position. Thanks..	[reply] [d/l] [select]
Re^5: doubt in string matching. by prasadbabu (Prior) on Oct 17, 2006 at 06:59 UTC
Mandrake You are absolutely correct, but OP has not given enough samples of input and he has not given the exact requirement clearly, which I mentioned in my first reply itself and the samething was highlighted by ikegami and chargrill. So I assumed he might have inputs with incremented characters inbetween instead of random characters. ikegami has mentioned We can't help you if you can't even describe what you want accuratly chargrill has mentioned I don't know what you mean. Solid examples will speak volumes, show us what output you want to get. Prasad	[reply]