Created
November 30, 2011 02:05
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| sub make_adder | |
| { | |
| my $addpiece = shift; | |
| return sub { shift + $addpiece }; | |
| } | |
| $f1 = make_adder(20); | |
| &f1(1); # = 21; | |
| &f1(2); # = 22; |
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closure - use a local variable in another function, then you can use that function elsewhere, even it is not in the context of that local variable. (the local variable is either cloned, or ref-counted)