perl closure 闭包

发布时间：2020-12-15 21:01:35 所属栏目：大数据来源：网络整理

导读：[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;

[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. ?

（编辑：李大同）

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