use strict;
use warnings;

sub greet            { print "Hello!\n"       }

sub inquire          { print "How are you?\n" }

sub bye              { print "Farewell!\n"    }

sub delete_all_files { print "*KABOOM*\n"     }

sub insecure_call {

    no strict 'refs';

    shift->();

}

insecure_call('greet');

insecure_ca…

One of the corners I often paint myself into when developing a tool is only accepting one type of input, usually STDIN, the standard input stream, like a pipeline (ex: cat fruit.txt | grep apple) or a redirect (ex: grep apple < fruit.txt)

What inevitably happens is I end up wanting the tool to work like any Unix tool and accept different kinds of input (filenames or arguments on the command line, for example.)

Finally I got fed up with it and added a function called multi_input()/users/tinypig/2015/08/index.html