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Were I trying to tout the advantages of Perl to a maintainance programmer who had been around the block, I would not put in comments that they would be sure to recognize as maintainance pitfalls! Instead I would go the other way:
#! /usr/bin/perl -w use strict; # Create a frequency count of all words in all input files my %freq_count; while (defined(my $line = <>)) { while ($line =~ /(\w+)/g) { $freq_count{$1}++; } } # Print the frequency summary. foreach my $word (sort keys %freq_count) { print "$word:\t$freq_count{$word}\n"; }
There. The looping constructs are all readily explainable, there are no hidden uses of $_, and no comments that will become wrong with time. I also removed a bug in the code that you wrote (which you copied unchanged from eduardo).

Kudos to the first person to figure out what the bug is.

In reply to Re (tilly) 2: Efficiency in maintenance coding... by tilly
in thread Efficiency in maintenance coding... by eduardo

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