[DHTML] Cross-Browser Snake

**Twey** · 08-06-2006, 01:57 PM

If you create an object method like this:

Code:

function MyObject() {
  this.func = function() { doNothing(); };
}

Every time you create a new instance of MyObject, a new copy of that function is created. This is inefficient. Instead, if you do:

Code:

function MyObject() {
}

MyObject.prototype.func = function() { doNothing(); };

... the function is only created once, then pointers to it assigned to each new copy of MyObject.

In Konqueror, there's an interesting bug: on hitting the apple for the first time, the snake jumps back to its starting point then back to where it was after a few seconds, after which it is unable to collide with the apple (although it can still hit walls).

/EDIT: Also, if you toggle between speeds a few times, your snake goes super-sonic.

**shachi** · 08-06-2006, 02:06 PM

Oh, this is awesome.

I would be more Interested if you could write a tutorial on how did you make this.

**ddadmin** · 08-06-2006, 03:40 PM

Not bad at all. Functionality wise one thing I'd change is the speed difference between Medium and Fast- right now the two basically are both insanely and similarily fast to me.

**blm126** · 08-06-2006, 05:52 PM

shachi: Take a look through the source. I don't think I did anything to advanced.

ddadmin: Thanks for the suggestion! My original link has been updated to include a faster 'fast'.

Twey: Thanks for the tip. Changing to that method also stops IE 5.5 from crashing. I have added support for Konqueror.

It didn't like how I used innerHTML. So I switched to appendChild. It is still pretty buggy though. I also prevented super-sonic,but my solution is a little cheap

Here's the latest version...

**jr_yeo** · 08-06-2006, 06:26 PM

pretty cool if u could add a 'Pause' feature

**Twey** · 08-06-2006, 07:37 PM

Yeah, I thought about suggesting that.

**blm126** · 08-06-2006, 07:59 PM

Ok, I added a pause feature

thanks for the suggestion.

**ddadmin** · 08-09-2006, 09:14 PM

Ok, I'm going to post this script to DD soon. Did you want the OO version to be the one showcased? You should pick the one you plan on making any updates to to.