Question

I am trying to find an efficient way to compare a given array that represents the Quality of Service of a Client with the QOS of a Two Web Services and pick up the most similar to the given QOS.

  int[] arrayCompare(int[] clientQOS){

      int[] service1QOS=new int[]{3,1,4};
      int[] service2QOS=new int[]{1,3,3};

      //I want to compare clientQOS     with  S1 QOS       and S2 QOS

      return  mostSimilarArray
   }

Answer 1

Loop through the source array for each target, incrementing a counter by the delta (positive difference between the values). The smallest delta sum is the closest match.

Caveats

This should be true if you consider numerically closer to be more similar, and the scale between different values are equal.