defaults to shifting @ARGV : Special Variables - Perl
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#!/usr/bin/perl -w use strict; sub version { print "version\n"; } my $option = shift; # defaults to shifting @ARGV version() if $option eq "-v" or $option ...
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#!/usr/bin/perl-w
usestrict;
subversion{
print"version\n";
}
my$option=shift;#defaultstoshifting@ARGV
version()if$optioneq"-v"or$optioneq"--version";
print"Hello,world.\n";
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