编号正则表达式捕获的最大数量是多少?
发布时间:2020-12-14 06:27:44 所属栏目:百科 来源:网络整理
导读:我正在维护一些代码,通过串行收音机读取值并将其解压缩到Perl数据结构中: # Don't yell at me,I didn't write thisif ($command_string =~ /^.(.)(.).(..)(.)(..)(.)(....)(....)(....)(....) (..)(..)(.)(.)(.)(.)(..)(..)(..)(..)(..)(..)(.)(.)....... (
我正在维护一些代码,通过串行收音机读取值并将其解压缩到Perl数据结构中:
# Don't yell at me,I didn't write this if ($command_string =~ /^.(.)(.).(..)(.)(..)(.)(....)(....)(....)(....) (..)(..)(.)(.)(.)(.)(..)(..)(..)(..)(..)(..)(.)(.)....... (.)........(.)(.).*/sx) { $config->{sequence} = hex(unpack('H2',$1)); $config->{radio_id} = hex(unpack('H2',$2)); ... $config->{radio_type} = hex(unpack('H2',$26)); $config->{radio_channel} = hex(unpack('H2',$27)); } 这个笨重的捕获正则表达式令我想起:Perl中编号捕获变量的上限是什么?一直到$MAXINT吗?
此脚本的工作速度至少为$N = 5000000.之后,内存不足.
$N = $ARGV[0] || 5000; $q = '(.)' x $N; $regex = qr/$q/; ("x" x $N) =~ $regex; print eval "$$N"; (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |