.NET Tips and Tricks

I’m sure you all know that according to the rules of elementary arithmetic division by zero is not allowed*. Also, I’m pretty sure you are familiar with the “Attempted to divide by zero” exception and some of you even write a specific catch in try…catch blocks to catch the DivideByZeroException to be able to handle it according to your application needs.

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About a year ago i had to architucture some web application with a very rich client side UI.

ASP.NET was an easy choise for a server side code, but what about client side ?
The heavy viewstate, endless event handlers and infinity number of server side requests just to make the GUI  friendly – well, it just didn’t sound as a proper way to do it.

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I’m pretty sure all of you know the WebRequest and it’s derived class HttpWebRequest.
And what a marvelous property both of them have – the TimeOut.

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We all know that script is blocking element, meaning no content will be rendered untill script block is parsed and executed or downloaded then parsed and then executed in case of externale script.

And we were told endless times that the best practice is to load scripts at the end of web page. It’s true.

We also have document.ready events thanks to numerous javascript frameworks that gives us opportunity to perform most of our JS actions when document is ready to be manipulated. But there are cases when you do need JS blocking features.
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I have two simple questions for you about boolean values in Javascript.
When will browser show alert message:

        if (a-b) alert("it's true!");

And another one
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This post is somehow related to my previous post about javascript function context.  Recently I helped one of my friends to debug a very funny problem. He told me that his inline event handler doen’t work, because he could not pass this object to his function.
You probably wonder what did I find?
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Another great interview question.

Will the following code compile and if yes what will be the result of it ?
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How many times you had problem or were asked about what happened to this object in your function? Or why this is not an object you expect it to be? Probably these times you have to remind yourself or your fellow programmer about function context.
First of all I have to ask you all a pretty lame question. If you write function in JS block right inside your HTML, what this keyword will refer to?

<script type="text/javascript">
		function testThis(){
		  //who is "this"
		}
</script>

And now to the real example.
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I suppose all of you have suffered all those terrible memory leaks in Internet Explorer.
Sometimes it’s bearable, but most of the time it’s not. I say enough is enough !

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This one is a great c# interview question – short and simple, but tricky.

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