Scala - 如何检查哪个正则表达式模式匹配字符串

Question

假设我有超过30个正则表达式模式：

val pattern1 = """(pat)(tern)(1)""".r
val pattern2 = """(pat)(tern)(1)""".r
val pattern3 = """(pat)(tern)(1)""".r
...

我想检查哪个模式与字符串匹配。像这样的东西

val s = "MyString"

s match {
 case pattern1 => grup 1 of pattern1
 case pattern2 => grup 2 of pattern2
 case pattern3 => grup 3 of pattern3
 ...
 case _ => "No pattern match"
}

Answer 1

在您的情况下，您可以执行以下操作：

val s = "MyString"

s match {
   case k if s.matches(pattern1.regex) => //.....do something
   case k if s.matches(pattern2.regex) => //.....do something
   case k if s.matches(pattern3.regex) => //.....do something
   ...
   case _ => "No pattern match"

}