Scalar::Callback - ç°¡æçãªãã£ãã·ã¥ã楽ã«æ¸ã ã ãã¶æã«åæã®æ³ã®äººã®ããã°ã« Unknown::Programming - ||=ã¨doã使ã£ã¦ãã£ãã·ã¥ åã«ã©ã£ãã®ã½ã¼ã¹ã§ã sub method { my $self = shift; my $code = sub { ### åå¦ç return Hoge->new; }; return $self->{hoge_obj} ||= $code->(); }ã£ã¦ããæãã®ãè¦ããã ãã©ã©ã£ã¡ããããã ãã¼ãã åçã«ã¯doã®æ¹ãä½è¨ãªå¦çãããªãã®ã§å¥½ããªãã ãã©ããã¨æ¸ãã¦ãã£ãã®äºãå¼ã£ããã£ã¦ä½ã£ã¦ã¿ã¾ããã http://svn.yappo.jp/repos/public/Scalar-Callback/trunk/lib/Scalar/Callback.pm ã¡ãã£ã¨ããã¹ã¯ãªããã¨ãã«expires
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