{"id":901,"date":"2013-04-15T09:06:54","date_gmt":"2013-04-15T01:06:54","guid":{"rendered":"http:\/\/www.hzaumycology.com\/chenlianfu_blog\/?p=901"},"modified":"2014-04-08T16:07:34","modified_gmt":"2014-04-08T08:07:34","slug":"perl%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"http:\/\/www.chenlianfu.com\/?p=901","title":{"rendered":"perl\u7b14\u8bb0"},"content":{"rendered":"

1. select\u51fd\u6570<\/h1>\n

select FileHandl<\/span>
\n\u8be5\u51fd\u6570\u7528\u6765\u8bbe\u7f6e\u8f93\u51fa\u7684\u6587\u4ef6\u53e5\u67c4\u4e3a\u9ed8\u8ba4\u6587\u4ef6\u53e5\u67c4\uff0c\u5e76\u8fd4\u56de\u4ee5\u524d\u9ed8\u8ba4\u7684\u6587\u4ef6\u53e5\u67c4\u3002\u6700\u539f\u59cb\u7684\u9ed8\u8ba4\u6587\u4ef6\u53e5\u67c4\u662f ‘main::STDOUT’ ,\u5373\u6807\u51c6\u8f93\u51fa\u3002\u4e3a\u4e86\u8f93\u51fa\u7684\u65b9\u4fbf\uff0c\u53ef\u4ee5\u4f7f\u7528\u8be5\u51fd\u6570\u6307\u5b9a\u9ed8\u8ba4\u7684\u8f93\u51fa\u3002
\n\u4f7f\u7528\u4f8b\u5b50\uff1a<\/p>\n

open FILE, '>', \"job\";\r\n$oldHandle = select ( FILE );\r\nprint \"This is sent to $oldHandle\\n\";print \"This is sent to $oldHandle\\n\";\r\n$origin = select ( $oldHandle );\r\nprint \"This is sent to $origin\\n\";<\/pre>\n
2. \u67e5\u627eperl\u6a21\u5757\u6216\u5378\u8f7d<\/p>\n
\n\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5217\u51fa\u6240\u6709perl\u6a21\u5757\u7684\u4f4d\u7f6e\u3002eg\uff1a\u901a\u8fc7grep GD\uff0c\u6765\u627e\u51faGD\u6a21\u5757\u6240\u5904\u4f4d\u7f6e\uff0c\u7136\u540e\u76f4\u63a5rm\u6389\u5373\u53ef\u3002<\/p>\n
\r\n$ perl -MFile::Find -le 'finddepth({wanted=>sub{print $_ if\/\\.pm$\/},no_chdir=>1},@INC)' | grep 'GD'\r\n\/usr\/local\/lib64\/perl5\/GD.pm\r\n\/usr\/local\/lib64\/perl5\/GD\/Simple.pm\r\n\/usr\/local\/lib64\/perl5\/GD\/Polygon.pm\r\n\/usr\/local\/lib64\/perl5\/GD\/Image.pm\r\n\/usr\/local\/lib64\/perl5\/GD\/Group.pm\r\n\/usr\/local\/lib64\/perl5\/GD\/Polyline.pm\r\n\/usr\/local\/share\/perl5\/GD\/SVG.pm\r\n\/usr\/local\/share\/perl5\/Bio\/Graphics\/GDWrapper.pm\r\n\/usr\/lib64\/perl5\/GDBM_File.pm\r\n<\/pre>\n
3. \u5341\u8fdb\u5236\u8f6c\u4e8c\u8fdb\u5236<\/h1>\n
\r\n$a = sprintf(\"%b\",$a)+0;\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u4e3b\u8981\u8bb0\u5f55\u7740perl\u7684\u4e00\u4e9b\u7528\u6cd5\u4e0e\u4e2a\u4eba\u5fc3\u5f97\u3002 \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5],"tags":[9],"_links":{"self":[{"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/posts\/901"}],"collection":[{"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=901"}],"version-history":[{"count":7,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/posts\/901\/revisions"}],"predecessor-version":[{"id":2097,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=\/wp\/v2\/posts\/901\/revisions\/2097"}],"wp:attachment":[{"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=901"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=901"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.chenlianfu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}