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When to use the ?: conditional operator

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  1. /*Fumio Nonaka in: Coding|Jump To Comments February 9, 2011
  2. The conditional operator ?: is used to select an alternative value to be assigned. It is basically faster than the if statement.*/
  3.  
  4.  
  5. myVariable = (condition) ? valueA : valueB;  
  6.  
  7. view plaincopy to clipboardprint?
  8. if (condition) {  
  9.     myVariable = valueA;  
  10. } else {  
  11.     myVariable = valueB;  
  12. }  
  13. /*However if the value selected by the conditional operator is to be added with the addition assignment operator +=, its operation will come to be slow.*/
  14.  
  15.  
  16. myVariable += (condition) ? valueA : valueB;  
  17. //Using the assignment operator instead makes it a little faster.
  18.  
  19.  
  20. myVariable = (condition) ? myVariable + valueA : myVariable + valueB;  
  21. //But in this case, the if statement is better to use.
  22.  
  23.  
  24. view plaincopy to clipboardprint?
  25. if (condition) {  
  26.     myVariable += valueA;  
  27. } else {  
  28.     myVariable += valueB;  
  29. }

URL: http://blog.jactionscripters.com/2011/02/09/when-to-use-the-conditional-operator/

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