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_0 ) {
    HashSet < String > var_1 = new HashSet < > ( ) ;
    for ( String var_2 : var_0 ) {
      String var_3 [ ] = var_2 . split ( "@" ) ;
      String var_4 [ ] = var_3 [ 0 ] . replaceAll ( "." , "" ) . split ( "[+]" ) ;
      var_1 . add ( var_4 [ 0 ] + var_3 [ 1 ] ) ;
    }
    return var_1 . size ( ) ;
  }
  