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Compare (Floating Point ) Values

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  1. <script>
  2. //***********************************************************************************
  3. //* == Floating Point Comparison ==                                                 *
  4. //*                                                                                 *
  5. //* Naturally JS stores all numbers (real/complex/rational/ect...) as floating      *
  6. //* points, this is good and bad.                                                   *
  7. //*                                                                                 *
  8. //* Good: {                                                                         *
  9. //*    - No type conversion                                                         *
  10. //*    - More percise calculations                                                  *
  11. //* }                                                                               *
  12. //*                                                                                 *
  13. //* Bad: {                                                                          *
  14. //*    - Less control over data types                                               *
  15. //*    - You have to design these comparisons                                       *
  16. //*    - Slower to process (JS remains very fast though)                            *
  17. //*    - Harder to deal with                                                        *
  18. //* }                                                                               *
  19. //***********************************************************************************
  20.  
  21. // Call the function and ask for the three parameters.
  22. function compare(numb1, numb2, offset) {
  23.      var tmp; // Declare a temp to be assigned and compared to the allowed offset.
  24.  
  25. 	 // Subtract the two vales (Math.abs(x - y); may work but this is safer.)
  26. 	 (numb1 < numb2) ? tmp = (numb1 - numb2) : tmp = (numb2 - numb1);
  27.  
  28. return tmp < offset;
  29. }
  30. </script>

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