comefrom: <qiyuangong>929_Unique_Email_Addresses_1.java
code: public int numUniqueEmails(String[] emails) {
          HashSet<String> emailSet = new HashSet<>();
          for (String email: emails) {
              String firstSplit[] = email.split("@");
              String secondSplit[] = firstSplit[0].replaceAll(".", "").split("[+]");
              emailSet.add(secondSplit[0] + firstSplit[1]);
          }     
          return emailSet.size();
      }
masked: public int sample_funcname ( String [ ] var_1 ) {
    HashSet < String > var_3 = new HashSet < > ( ) ;
    for ( String var_4 : var_1 ) {
      String var_7 [ ] = var_4 . split ( "@" ) ;
      String var_13 [ ] = var_7 [ 0 ] . replaceAll ( "." , "" ) . split ( "[+]" ) ;
      var_3 . add ( var_13 [ 0 ] + var_7 [ 1 ] ) ;
    }
    return var_3 . size ( ) ;
  }
  