Gomez, Juan wrote:
Hi all
I have a problem need to work with date
I have a input like these : 20050829 and I need to change it to
something like this : Aug 29 2005
but it still eludes me how to do that
can anyone help me please?
thanks
Armando
I was going to say "use regex" but then I saw this nice example of
unpack which should be faster.
So I tested it:
#!/usr/bin/perl
#
use strict;
use warnings;
use Benchmark ':hireswallclock';
my $string = "20050829";
timethese(1000000, {
'regex' => sub { my @array = $string=~/(\d\d\d\d)(\d\d)(\d\d)/;},
'unpack'=> sub { my @array = unpack("A4A2A2",$string); },
});
And ended up with this:
[EMAIL PROTECTED]:~$ benchmark.pl
Benchmark: timing 1000000 iterations of regex, unpack...
regex: 2.75194 wallclock secs ( 2.75 usr + 0.00 sys = 2.75 CPU)
@ 363636.36/s (n=1000000)
unpack: 2.15273 wallclock secs ( 2.15 usr + 0.00 sys = 2.15 CPU)
@ 465116.28/s (n=1000000)
I think the POSIX modules would be considerably slower but I did not
test them.
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