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Re^8: How A Technique Becomes Over-rated

by Anonymous Monk
on Sep 23, 2005 at 18:14 UTC ( #494619=note: print w/ replies, xml ) Need Help??

in reply to Re^7: How A Technique Becomes Over-rated
in thread How A Function Becomes Higher Order

But, by limiting your customization technique to callbacks, all shared state must be stored in the lexical scope of the caller.
($foo, $bar) = incrementByOneAndTwo(42); ($baz, $quux) = incrementByOneAndTwo(0); $\="\n"; print $foo->(); print $bar->(); print $quux->(); print $foo->(); print $baz->(); print $bar->(); print $quux->(); sub incrementByOneAndTwo { my $shared_state = shift; return (sub{$shared_state+=1}, sub{$shared_state+=2}); }

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