regular expressions with commas?

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

hello monks... another newb question... searched everywhere for this and still can't find anything that helps me deal with the commas in this.. my script produces a list of names... I need a metacharacter that will just match any string that ends with ,Y

davis,N
brown,Y
smith,Y,N,B
jones,N,Y,B,A
clarke,Y,N,Y
[download]

if ($string =~ /^brown,Y/gi)
{do this}
else
{do this}
[download]

cheers steve

Comment on regular expressions with commas? Select or Download Code

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Re: regular expressions with commas? by ambrus (Abbot) on Dec 10, 2005 at 10:46 UTC
If you want to accept `^Y` only at the end of the string (except for an optional final newline), you need the dollar sign: `$string =~ /,Y$/`	[reply] [d/l] [select]
Re^2: regular expressions with commas? by Happy-the-monk (Canon) on Dec 10, 2005 at 11:02 UTC
you need the dollar sign: `$string =~ /,Y$/` read it in `perldoc perlre` right on line 59. Cheers, Sören	[reply] [d/l]
Re: regular expressions with commas? by osunderdog (Deacon) on Dec 10, 2005 at 11:02 UTC
Well, here is what I would start with: `use strict; while(<DATA>) { #using re match. # match beginning, anything except comma, # followed by a comma and 'Y' if(m/^([^,]+),Y/) { print "RE Name:" . $1 . "\n"; } } __DATA__ davis,N brown,Y smith,Y,N,B jones,N,Y,B,A clarke,Y,N,Y` [download] Or Perhaps: `use strict; while(<DATA>) { my @data = split(','); if($data[1] eq 'Y') { print "RE Name:" . $data[0] . "\n"; } } __DATA__ davis,N brown,Y smith,Y,N,B jones,N,Y,B,A clarke,Y,N,Y` [download] Hazah! I'm Employed!	[reply] [d/l] [select]
Re^2: regular expressions with commas? by chas (Priest) on Dec 10, 2005 at 14:49 UTC
Those both match given the string "Blah,Y,X", which has a substring ending with ",Y", but doesn't itself end with that sequence. (It isn't completely clear to me what the OP wanted, though...)	[reply]
Re^3: regular expressions with commas? by osunderdog (Deacon) on Dec 10, 2005 at 22:33 UTC
I interpreted it as meaning a ",Y" after the name string. Many others interpreted it as meaning a ",Y" at the end of the line. The OP wasn't clear so I figure I would share my interpretation. Hazah! I'm Employed!	[reply]
Re^2: regular expressions with commas? by webshark (Acolyte) on Dec 10, 2005 at 11:33 UTC
cheers guys... works a treat..	[reply]
Re: regular expressions with commas? by Anonymous Monk on Dec 10, 2005 at 11:37 UTC
There's written in the book, that metacharacter $ match end of line in regular expressions. So you can use /,Y$/ for example. Greetings Richard	[reply]


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