Ruby正则表达式从字符串中删除^ C字符(Ruby regex remove ^C character from string)

Ruby正则表达式从字符串中删除^ C字符(Ruby regex remove ^C character from string)

有一个文件具有控制B和控制C命令分隔文本字段。 看起来像：

"TEST\003KEY\002TEST\003KEY"

我试图创建一个与此匹配的正则表达式并将其删除。 我不确定为什么这个正则表达式不起作用：

"TEST\003KEY\002TEST\003KEY".gsub(/\00[23]/, ',')

There is a file that has control B and control C commands separating fields of text. It looks like:

"TEST\003KEY\002TEST\003KEY"

I tried to create a regex that will match this and remove it. I am not sure why this regex is not working:

"TEST\003KEY\002TEST\003KEY".gsub(/\00[23]/, ',')

最满意答案

请尝试以下方法：

"TEST\003KEY\002TEST\003KEY".gsub(/\002|\003/, ',')

这是在我的机器上的irb演示的：

$ irb 1.9.3p448 :007 > "TEST\003KEY\002TEST\003KEY".gsub(/\002|\003/, ',') => "TEST,KEY,TEST,KEY"

语法\002|\003表示“匹配字符文字\002或字符文字\003 ”。 原始问题\00[23]给出的表达式无效：这是字符文字\00 （空字符），后跟字符类[23] ：即它匹配双字符序列。

您还可以使用[[:cntrl:]]字符类来匹配所有控制字符：

$ irb 1.9.3p448 :007 > "TEST\003KEY\002TEST\003KEY\005TEST".gsub(/[[:cntrl:]]/, ',') => "TEST,KEY,TEST,KEY,TEST"

Try the following:

"TEST\003KEY\002TEST\003KEY".gsub(/\002|\003/, ',')

Here it is demonstrated in irb on my machine:

$ irb 1.9.3p448 :007 > "TEST\003KEY\002TEST\003KEY".gsub(/\002|\003/, ',') => "TEST,KEY,TEST,KEY"

The syntax \002|\003 means "match the character literal \002 or the character literal \003". The expression given in the original question \00[23] is not valid: this is the character literal \00 (a null character) followed by the character class [23]: i.e. it matches two-character sequences.

You can also use the [[:cntrl:]] character class to match all control characters:

$ irb 1.9.3p448 :007 > "TEST\003KEY\002TEST\003KEY\005TEST".gsub(/[[:cntrl:]]/, ',') => "TEST,KEY,TEST,KEY,TEST"