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Re: Simple Regex Question / Code Review

by Anonymous Monk
on Oct 11, 2012 at 09:21 UTC ( #998398=note: print w/ replies, xml ) Need Help??


in reply to Simple Regex Question / Code Review

my $blah = 'foo.Q'; print qq{gcc $blah -o @{[ substr $blah, 0, -2 ]} and many more }; __END__ gcc foo.Q -o foo and many more

See Re^2: How can we interpolate an expression??

See perlintro, perlrequick for the regex portion, and for the template, see (tye)Re: Stupid question (and one discussion of that template Re^2: RFC: Creating unicursal stars)

#!/usr/bin/perl -- #~ 2012-10-11-01:58:20PDT by Anonymous Monk #~ perltidy -csc -otr -opr -ce -nibc -i=4 use strict; use warnings; use Data::Dump qw/ dd /; Main( @ARGV ); exit( 0 ); sub getFiles { my @files; foreach (@_) { if( /\.[cC]$/ ){ if( -e $_ ){ push @files, $_; } else { printf "Unreadable file: %s : (%d) %s\n", $_, $!, $!; } } else { print "Invalid file: $_\n"; } } return \@files; } sub compile { my $files = shift; for( @$files ){ ## all of these do the same thing, see perlintro / perlrequick for exp +lanation #~ my( @cmd ) = ( 'gcc', $_, '-o', /^(.+?)\.[^\.]+$/ ); #~ my( @cmd ) = ( 'gcc', $_, '-o', $_ =~ /^(.+?)\.[^\.]+$/ ); my( @cmd ) = ( 'gcc', $_, '-o' ); #~ push @cmd, $1 if /^(.+?)\.[^\.]+$/ ; push @cmd, $1 if $_ =~ /^(.+?)\.[^\.]+$/ ; dd \@cmd; system @cmd; } } sub Main { return print Usage() if not @_; my $files = getFiles( @_ ); dd $files; compile( $files ); } ## end sub Main sub Usage { <<"__USAGE__"; $0 $0 list of files to process __USAGE__ } ## end sub Usage __END__

If you're going to be using qx, you might want to quote/escape vars (like filenames) with String::ShellQuote


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