Groovy正则表达式：在Switch语句中捕获组 [英] Groovy Regex: Capture group in Switch Statement

问题描述

  def vehicleSelection =汽车选择：丰田
 
 switch（vehicleSelection）{
 case〜/ Car Selected：（。*）/：
 
 println选择的车型为+ ?? [0] [1] 
 
 
 
 
 
 $ b 
是否可以在没有的情况下提取Toyota定义一个新的（ def ）变量？
解决方案
 Groovy添加到 Matcher 中的 lastMatcher 方法：
 import java.util.regex.Matcher 
 $ b $ def vehicleSelection ='汽车选择：丰田
 
 switch（vehicleSelection）{$ b $选择车型：$ {Matcher.lastMatcher [0] [1]}
} 
  
 
Given the following Groovy code switch statement:
def vehicleSelection = "Car Selected: Toyota"

switch (vehicleSelection) {
   case ~/Car Selected: (.*)/:

      println "The car model selected is "  + ??[0][1] 
}
Is it possible to extract the word "Toyota" without defining a new (def) variable?
解决方案
This is possible using the lastMatcher method added to Matcher by Groovy:
import java.util.regex.Matcher

def vehicleSelection = 'Car Selected: Toyota'

switch( vehicleSelection ) {
   case ~/Car Selected: (.*)/: 
     println "The car model selected is ${Matcher.lastMatcher[0][1]}"
}


                        
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