Re: Hex, Localtime and strings

Because the first example uses a hex representation of an integer, and the second example uses a string of characters that happen to include a 0x and some stuff that looks (to a human) hex-ish (but not to Perl). Perl converts that string to a number following Perl's numerification of a string rules, which in this case results in a '0'.


use strict;
use warnings;
use diagnostics;

my $daTime = "0x506143ca";
print scalar localtime $daTime, "\n";
[download]

...the output...

Argument "0x506143ca" isn't numeric in localtime at mytest.pl line 10 
+(#1)
    (W numeric) The indicated string was fed as an argument to an oper
+ator
    that expected a numeric value instead.  If you're fortunate the me
+ssage
    will identify which operator was so unfortunate.
    
Wed Dec 31 16:00:00 1969
[download]

As for the "Wed Dec 31 16:00:00 1969": perl -E 'say localtime 0' will yield the same result.

Dave

Comment on Re: Hex, Localtime and strings Select or Download Code

Replies are listed 'Best First'.
Re^2: Hex, Localtime and strings by theneil (Novice) on Sep 26, 2012 at 17:25 UTC
Thank you guys! Worked like a charm! I'm slowly learning :)	[reply]
Re^3: Hex, Localtime and strings by simatics (Initiate) on Jun 22, 2013 at 14:25 UTC
I know this is late, but I'll share what worked for me! `$hexval = hex '51C07405'; print scalar(localtime($hexval));` [download]	[reply] [d/l]