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Re^4: Regarding STDOUT and indirect object notation for print

by kennethk (Abbot)
on Dec 29, 2009 at 21:07 UTC ( #814822=note: print w/replies, xml ) Need Help??

in reply to Re^3: Regarding STDOUT and indirect object notation for print
in thread Regarding STDOUT and indirect object notation for print

A simple implementation to explain gmargo's concept:

package Foo; use strict; use warnings; sub new { return bless {}; } sub method { return 1; } 1;

#!/usr/bin/perl use strict; use warnings; require Foo; my $class = 'Foo'; my $obj = bless {}, $class; print $obj->method;

Works fine, but if you remove the require Foo; line, you get the error Can't locate object method "method" via package "Foo" at line 9. perl needs the require statement to find and compile the source files.

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Re^5: Regarding STDOUT and indirect object notation for print
by romandas (Pilgrim) on Dec 29, 2009 at 21:13 UTC

    Thanks.. though, I understood that it (the use statement) would be required for something I explicitly created in code.

    I was just thrown off by the built-in nature of STDOUT and its ilk; I thought perhaps IO::Handle would have already been 'used', thus the methods would've been available, but that somehow I wasn't doing it "right". Thanks for the example.

      Would you want perl to load the entire Core module set before running a one-liner?

        Well that's a major exaggeration. The cost of loading IO::Handle would be quite small if it was rewritten in C. (100 bytes?) In fact, there already exists modules whose methods are built right into Perl: utf8, version and UNIVERSAL, for example.

        Not the entire Core, but I'm surprised that the module for an available object wouldn't be loaded to assist handling that object.

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