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In addition to juster's Re: Overwriting a Constant, probably the closest you can get is via simulative (re)setting of constants from the command line by using Getopt::constant, you provide default values - for constants you use (these values can be scalars, lists or even coderefs) - upon 'use'ing Getopt::constant, then from the command line these constants can be made to look like having been assigned new values or used in their original definitions.

Interesting to note is that Getopt::constant does prefix such constants too and this serves to distinguish them by providing a label before the constant name, you can pass empty-string to the ':prefix' label too.

#SYNOPSIS from Getopt::constant document... # Assuming @ARGV is: ('-foo=9,8,7', '-bar', 'wakawaka.txt') use Getopt::constant ( ':prefix' => 'C_', #Can be null too 'foo' => [3,5], 'bar' => 0, ':usage' => "Usage: thingamabob -foo=one,two,three : fooey on these items -bar : enable barriness ", ); # @ARGV is now 'wakawaka.txt', and you've now got # a constant C_foo with value (9,8,7) # and a constant C_bar with value 1

N.B: Nefarious purposes can backfire in a hairy way so 'plot' with caution...

Excellence is an Endeavor of Persistence. Chance Favors a Prepared Mind.

In reply to Re: Overwriting a Constant by biohisham
in thread Overwriting a Constant by saintmike

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