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Re: regex needed

by cheekuperl (Monk)
on Jul 12, 2012 at 10:44 UTC ( #981361=note: print w/replies, xml ) Need Help??


in reply to regex needed

I need to capture anything after $$
my $line = '%TMP%\$$(DATE)_RE_IRD_Soc'; my $line2 = '%RESULTS%\$$(DATE_USA)' ; my $line3 = '%RESULTS%\$$(1110_DATE_USA)'; @lines=($line,$line2,$line3); foreach $elem (@lines) { while($elem=~m/(.*)\$\$(.*)/g) { print "\nBefore: [$1], After : [$2]"; } }
I need to capture anything after $$ ,in $1 and $2.
You have not mentioned what exactly you want in $1 and $2.

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Re^2: regex needed
by doubledecker (Scribe) on Jul 12, 2012 at 10:46 UTC
    sorry, from $line, I need DATE in $1 and _RE_IRD_Soc in $2 $line2, $line3 doesn't have anything in $2. my idea is to have one regex which satisfy both conditions.

      It may help to talk it through in words first. The pattern you're looking at is:

      • Two dollar signs (metacharacters, will need escaping)
      • An open parenthesis (also needs escaping)
      • Some text up to a closed parenthesis (capture this in $1)
      • A closed parenthesis (escaped)
      • Anything else that exists beyond that (captured in $2)

      Now just put those elements together in a regex:

      if( $line =~ m[ \$\$ # two dollar signs \( # open paren ([^)]+) # capture until closed paren \) # close paren (.*) # capture the rest, if any ]x ){ # do stuff with $1 and $2 }

      Aaron B.
      Available for small or large Perl jobs; see my home node.

      Check if this works:
      my $line = '%TMP%\$$(DATE)_RE_IRD_Soc'; my $line2 = '%RESULTS%\$$(DATE_USA)' ; my $line3 = '%RESULTS%\$$(1110_DATE_USA)'; @lines=($line,$line2,$line3); foreach $elem (@lines) { if($elem=~m/.*\$\$(\(.*\))(.*)?/) { print "\nFirst: $1, Second: $2"; } }

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