comefrom: <qiyuangong>005_Longest_Palindromic_Substring_2.java
code: private static char[] addBoundaries(char[] cs) {
           if (cs==null || cs.length==0)
               return "||".toCharArray();
  
           char[] cs2 = new char[cs.length*2+1];
           for (int i = 0; i<(cs2.length-1); i = i+2) {
               cs2[i] = '|';
               cs2[i+1] = cs[i/2];
           }
           cs2[cs2.length-1] = '|';
           return cs2;
       }
masked: private static char [ ] sample_funcname ( char [ ] var_0 ) {
    if ( var_0 == null || var_0 . length == 0 ) return "||" . toCharArray ( ) ;
    char [ ] var_8 = new char [ var_0 . length * 2 + 1 ] ;
    for ( int var_9 = 0 ;
    var_9 < ( var_8 . length - 1 ) ;
    var_9 = var_9 + 2 ) {
      var_8 [ var_9 ] = '|' ;
      var_8 [ var_9 + 1 ] = var_0 [ var_9 / 2 ] ;
    }
    var_8 [ var_8 . length - 1 ] = '|' ;
    return var_8 ;
  }
  