Sorry about all these silly questions, I've been thrust into Perl programming and I'm finding it really hard to think like a Perl programmer. Silly question for today: I load a pipe delimited file into a hash using the id field as the key, like so #open file my %hash; while (<MY_FILE>) { chomp; my ($id, $path, $date) = split ...
In Perl, is it possible to create a global variable based on a string? E.g., if I had a function like: sub create_glob_var { my ($glob_var_str) = @_; # something like this ( but not a hash access). our ${$glob_var_str}; }; and I called it like: create_glob_var( "bar" ); How could I modify create_glob_var to actually cr...
Why does the following snippet work at all? And what evil might be possible using this? But seriously, is there any reason, the code in ${} gets evaluated at all and then used as scalar reference? use strict; no strict 'refs'; our $message = "Hello world!"; print "${ lc 'MESSAGE' }\n"; ...
I know I could easily do something like sub sin { sin($_[0]); } and symbolically reference that for every function I need to symb ref, but I'd just like to know if there's a way to do something like {$foo}(123); vs. &{$foo}(123); which works, but not for core functions. Thanks. ...