Hi, why not use tr?
$str =~ tr/io/10/; Brs 想念你的每一天 ----- 原邮件 ----- 发件人： "Hamann, T.D." <thomas.ham...@naturalis.nl> 收件人： "beginners@perl.org" <beginners@perl.org> 抄送： 发送日期： 2013年1月2日, 星期三, 10:34 下午 主题: Substituting letters for numbers Hello, Given a string: i994 where I want to replace the 'i' by a '1' the following regex succesfully replaces the letter by a number: s/(i)(\d\d\d)/1$2/; However, given a string: i99o where I want to replace the 'i' by a '1' and the 'o' by a '0' (zero), the following regex fails: s/(i)(\d\d)(o)/1$20/; for the obvious reason that perl looks for a pattern match at bracket set #20, which doesn't exist. I can fix this by inserting a space in front of the zero, like this: s/(i)(\d\d)(o)/1$2 0/; and then using a second regular expression to remove the space, but that somehow seems silly. Surely there is a quicker way to do this? Regards, Thomas Hamann -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
