Cracking the interview Question19.5

gistfile1.txt

public class Question195
{
  public static class Result
  {
    private int hits;
    private int pseudohits;
  }
  
  public static Result estimate(String guess, String solution) {
    Result res = new Result();
    int solutionMask = 0;
    if (guess.length() != solution.length()) return null;
    for (int i = 0; i < solution.length(); i++) {
      solutionMask |= 1 << ( 1 + solution.charAt(i) - 'A' );
    }
    
    for (int i = 0; i < guess.length(); i++) {
      if( solution.charAt(i) == guess.charAt(i) ) {
        ++res.hits;
      } else if(  (( 1 << (1 + guess.charAt(i) - 'A') ) & solutionMask ) >= 1) {
        ++res.pseudohits;
      }
    }
     return res; 
  }
  
  public static void main(String[] args) {
    String guess = "YRGB";
    String solution = "RGGB";
    
    Result result1 = estimate( guess, solution);
    System.out.println("hits Expected(2):" + result1.hits);
    System.out.println("hits Expected(1):" +result1.pseudohits);
    
  }
}