Sanity check or oddity with a single line to set a Boolean

[Chris Martin]

Hey everyone,

I'm not sure why this is not working, and i'd like to understand why I get
the compile error.  I just keep looking at the code and thinking it should
be okay.  I'm basically trying to set a Boolean via a "inline check".  Here
are some variables to give you an idea of the initialized state.

var str1:String = "";
var num1:Number;
var num2:Number = 0;
var resultBool:Boolean = false;

Here's the line of code.

resultBool = (str1 != "" | (!isNaN(num1) | num2 != 0));

It looks more confusing when I removed the context out of it, but yeah
that's it.

When I compile it I get the follow error:
1067: Implicit coercion of a value of type Boolean to an unrelated type
Number.

I ultimately expanded the logic to be this, to stop the compile error from
happening.

if(str1 != "")
    resultBool = true;
else{
    if(!isNaN(num1))
        resultBool = true;
    else if(num2 != 0)
        resultBool = true;
}

I even tried this variation and still got the exception during compile.

resultBool = (str1 != "") | (!isNaN(num1) | num2 != 0);

So yeah.  I'm certainly not adverse to having the expanded version in my
code.  It will probably be easier to read anyways.  I just wanna get my
head straight on understanding the why.

Thanks in advance,

Chris