Dr.Ruud wrote:
> print substr( $word, $-[0], 3 )
> while $word =~ /.(?=..)/g;
>
Doesn't beat substr.
#!/usr/bin/env perl
use strict;
use warnings;
use Data::Dumper;
# Make Data::Dumper pretty
$Data::Dumper::Sortkeys = 1;
$Data::Dumper::Indent = 1;
# Set maximum depth for Data::Dumper, zero means unlimited
$Data::Dumper::Maxdepth = 0;
use Benchmark qw(:all);
my $word = "thequickbrown";
my $size = 3;
cmpthese( 50_000, {
'via arrays' => \&via_arrays,
'via substr' => \&via_substr,
'via unpack' => \&via_unpack,
'via match' => \&via_match,
});
# for testing only
# via_arrays();
# via_substr();
# via_unpack();
# via_match();
sub via_arrays {
my @array = split //, $word;
my $max = @array - $size;
my @list = ();
for my $i ( 0 .. $max ){
push @list, join '', @array[ $i .. $i+$size-1 ];
}
# print Dumper \...@list; #for testing only
}
sub via_substr {
my $max = length( $word ) - $size;
my @list = ();
for my $i ( 0 .. $max ){
push @list, substr( $word, $i, $size );
}
# print Dumper \...@list; #for testing only
}
sub via_unpack {
my $max = length( $word ) - $size;
my @list = ();
for my $i ( 0 .. $max ){
push @list, (unpack( "A${i}A$size", $word ))[1];
}
# print Dumper \...@list; #for testing only
}
sub via_match {
my @list = ();
push @list, substr( $word, $-[0], 3 )
while $word =~ /.(?=..)/g;
#print Dumper \...@list; #for testing only
}
--
Just my 0.00000002 million dollars worth,
Shawn
Programming is as much about organization and communication
as it is about coding.
I like Perl; it's the only language where you can bless your
thingy.
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