topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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professional-javascript-14-DebugExample5.htm / htm



  <html>
      <head>
          <title>Debug Example</title>
          <script type="text/javascript">
                  function assert(bCondition, sErrorMessage) {
                      if (!bCondition) {
                          throw new Error(sErrorMessage);
                      }
                  }
  
          
                  function divide(iNum1, iNum2) {
                      assert(arguments.length == 2, "divide() requires two arguments.");
                      assert(typeof iNum1 == "number" && typeof iNum2 == "number", 
                                        "divide() requires two numbers for arguments.");
                  
                      return iNum1.valueOf() / iNum2.valueOf();
                  }
                  
                  alert(divide("a"));
  
          </script>
      </head>
      <body>
          <p>This page uses assertions to throw a custom JavaScript error.</p>
      </body>
  </html>
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 20/2/2008

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