严丝合缝开始与包含在字符串中的Perl

Question

我如何酷似$abc一个词从一个字符串匹配$（或特殊字符）一词"this is $$abc abc$abc $abc abc_$abc_ing";

Answer 1

您可以使用正则表达式：

(\$[a-z]+) 

说明：

(  : Start of group 
    \$  : A literal $. Since $ is a metacharacter we escape it. 
    [a-z]+ : one or more letters that is a word. You can use the modifier i 
      to match uppercase letters aswell. 
)  : End of grouping