Re: general regex question

my @names = qw "MacAchallies McAchallies MacAchounich McAchounich MacA
+dam McAdam MacAdie McAdie MacAindra";

for(@names){
   $_ =~ /M.?c*/ and print $'."\n";
}
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Comment on Re: general regex question Download Code

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Re^2: general regex question by ww (Archbishop) on May 14, 2005 at 16:21 UTC
fauria: Your regex, "/M.?c/" will do fine at finding "Mac" or "Mc" and printing the REST of the name (rather than what the OP sought), and recall that c matches ZERO OR MORE "c"s, meaning non-names, like Mccccc (ill-formatted roman numerals??) will match. Also, as written, (without capturing parens) it prints: Achallies Achallies Achounich Achounich Adam Adam Adie Adie Aindra whereas (with slightly different use of quantifiers and a couple additional names as test cases), this appears to work as requested: `#!C:perl/bin my @names = qw "M Mac McA Mcccccc MacAchallies McAchallies MacAchounic +h McAchounich MacAdam McAdam MacAdie McAdie MacAindra"; for(@names){ $_ =~ /(M.?c+.)/ and print "$1\n"; } =HEAD output is: Mac McA Mcccccc MacAchallies McAchallies MacAchounich McAchounich MacAdam McAdam MacAdie McAdie MacAindra =cut` [download] Noted also, that using $' (and friends) incurs a lot of overhead. And, just because they're not here, use strict; use warnings*.	[reply] [d/l]

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Re^2: general regex question
by ww (Archbishop) on May 14, 2005 at 16:21 UTC

Your regex, "/M.?c*/" will do fine at finding "Mac" or "Mc" and printing the REST of the name (rather than what the OP sought), and recall that c* matches ZERO OR MORE "c"s, meaning non-names, like Mccccc (ill-formatted roman numerals??) will match.

Also, as written, (without capturing parens) it prints:


Achallies
Achallies
Achounich
Achounich
Adam
Adam
Adie
Adie
Aindra

whereas (with slightly different use of quantifiers and a couple additional names as test cases), this appears to work as requested:

#!C:perl/bin

my @names = qw "M Mac McA Mcccccc MacAchallies McAchallies MacAchounic
+h McAchounich MacAdam McAdam MacAdie McAdie MacAindra";
 
for(@names){
   $_ =~ /(M.?c+.*)/ and print "$1\n";
}

=HEAD  output is:
Mac
McA
Mcccccc
MacAchallies
McAchallies
MacAchounich
McAchounich
MacAdam
McAdam
MacAdie
McAdie
MacAindra

=cut
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use strict; use warnings

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