完全匹配Perl中字符串中包含的$（或特殊字符）开头的单词

Question

如何从字符串$abc

中精确匹配"this is $$abc abc$abc $abc abc_$abc_ing";之类的字词

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