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perl closure 闭包

[root@dou shili]# cat closure.pl
#!/usr/bin/perl -w
use strict;

sub outer {         my $color = shift;         my $ref = sub {                 my $object = shift;                 print "paint the $object $color.\n";         }; return $ref; # returns a closure. } my $p1 = outer("red"); my $p2 = outer("blue"); $p1->("flower"); $p2->("sky"); [root@dou shili]# perl closure.pl paint the flower red. paint the sky blue.  

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