You have changed liverpole's

# Command-line
(my $x = shift) or die $syntax;
(my $y = shift) or die $syntax;

# Validity checking
($x =~ /^-?\d+$/) or die "$iam:  value $x not an integer\n";
($y =~ /^-?\d+$/) or die "$iam:  value $y not an integer\n";

[download]

to

my $start = shift @ARGV;
my $end = shift @ARGV;

[download]

It seems to me that you have gained more meaningful variable names but you have lost two forms of error checking, making your script less robust. You no longer detect if the user fails to supply enough arguments and you fail to validate those arguments that are supplied. Probably a backward step.

Cheers,

JohnGG

Update: As apotheon pointed out, I completely missed an element of his code. Please ignore this post.

In reply to Re^3: a simple exercise in readability by johngg
in thread a simple exercise in readability by apotheon

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