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                            一個正則表達式也可以被用于替換字符串的一部分：

~~~
class Main {
  static function main() {
    var str = "aaabcbcbcbz";
    // g : replace all instances
    var r = ~/b[^c]/g;
    // "aaabcbcbcxx"
    trace(r.replace(str,"xx"));
  }
}
~~~

在替換中，我們可以使用 $X 來重用一個匹配的組：

~~~
class Main {
  static function main() {
    var str = "{hello} {0} {again}";
    var r = ~/{([a-z]+)}/g;
    // "*hello* {0} *again*"
    trace(r.replace(str,"*$1*"));
  }
}
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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