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Tracing Multiple Variable Values in One Trace Statement

Posted by Stefan Richter in General | 7 Comments

Here's one of the category "how come I didn't know this?". At least that was the case for, I guess I have been living under a stone.
Consider this code snippet in AS3:

view plain print about

1var i:int = 123;
2var foo:String = "foo";
3var wtf:Object = {prop:"rad"};
4
5trace(i, foo, wtf);

What happens when you compile this and watch the Output window or Console? I thought it'd fall over, but in fact you get

view plain print about

1123 foo [object Object]

Neat, I know. But I haven't known for long (it took Tink's code for me to notice).

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Posted on February 5, 2009 at 10:16 PM. 2566 views. 7 comments. Print

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#1 by Joe Hakooz on 2/5/09 - 10:55 PM

Nice tip...

Reminds me of when I used Flash 5 for two years before discovering the animation easing feature.
#2 by Dustin Sparks on 2/5/09 - 11:32 PM

I used this once back in the day, but I completely forgot it was possible. Thanks for the reminder, i'm already using it in projects again.
#3 by Randy Troppmann on 2/7/09 - 6:35 PM

I didn't know that either :-|

I always wrap them as an array:
trace([i,foo,wtf]);
#4 by Brad on 2/9/09 - 4:49 PM

I always need stuff to be more verbose since at any given time I can have up to 20 traces going. I just concatenate them since they're going to be converted to strings anyway. trace("i: " + i + " foo: " + foo)
#5 by Tink on 2/10/09 - 2:22 PM

Bugger, I've been leaving traces statements in my code ;)
#6 by Tiago on 2/13/09 - 1:37 PM

hmm.. simple but logic :)

Didn't knew that either..
#7 by mauricio massaia on 2/19/09 - 12:59 PM

Stefan if u use getQualifiedClassName inside a class u can get a package of that class.

like this:

package com.mysite.appname
{
   import flash.utils.getQualifiedClassName;

   public class TestTrace
   {
      public function TestTrace()
      {
         var i:int = 123;
         var foo:String = "foo";
         var wtf:Object = {prop:"rad"};

         trace( getQualifiedClassName( this ), i, foo, wtf );
         // com.mysite.appname::TestTrace 123 foo [object Object]
      }
   }
}

var example:TestTrace = new TestTrace();