Tutorial — Debugging

Here are a few functions that you might find helpful when working with JavaScript. These assume operation in a Browser (which makes a good experimental platform). In particular, the first function below sends output to a Browser window. If you were writing a Seibel Business Service, you might write to a Trace Log.

Print

function Print ()
{
    // Use the DIV element to style the output!...
    document.writeln('<div class="JSOut">');
    for (var ix=0; ix < arguments.length; ix++)
    {
        document.write (arguments[ix]);
    }
    document.writeln('');
    document.writeln('</div>');
}

Print Object

This function iterates over the Properties of any Object. 

function Print_Object (obj)
{
  Print ("OBJECT:");
  for (var px in obj)
  {
    Print (px, '=', obj[px]);
  }
}

Print Array

Just a handy Array Printer. 

function Print_Array (arr)
{
  Print ("ARRAY:");
  Print ("Len=", arr.length);
  for (var ix=0; ix < arr.length; ix++)
  {
    Print (ix, ': ', arr[ix]);
  }
}









 








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