in reply to Re^4: Comparing Lines within a Word List
in thread Comparing Lines within a Word List
If you cannot work out in your head what the substitution actually does (and it's not an easy thing if you are new to all this) then give it a try in some code. The lack of boilerplate in perl really helps when coding up trivial scripts for testing. eg:
#!/usr/bin/env perl use strict; use warnings; for my $word ('lama', 'aaron') { print "Word is $word\n"; print "without /g the regex becomes: "; my $r = $word; $r =~ s/(.*?)[ab](.*?)/$1\[ab\]$2/; print "$r\n"; print "with /g the regex becomes: "; $r = $word; $r =~ s/(.*?)[ab](.*?)/$1\[ab\]$2/g; print "$r\n"; }
Hopefully running this code will illustrate to you how the substitutions differ because of the /g modifier.
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Re^6: Comparing Lines within a Word List
by dominick_t (Acolyte) on Apr 30, 2016 at 14:49 UTC | |
by hippo (Bishop) on Apr 30, 2016 at 15:16 UTC |
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