Best Practices

[Alex Tweedly]

Erin D. Smale wrote:

> * Variables: I understand that vars are defined when they're 
> initialised (except globals, which need to be declared). This upsets 
> my sense of order somewhat, but I can see the advantages. That said, 
> is it best to declare variables anyway? Is there any performance 
> impact if I do or don't? Is it best practise to use the 
> explicitVariables property?

I almost always use explicitVariables, and therefore almost always 
declare variables.

If your typing is as bad as mine, then it's worth small amount of extra 
typing for the convenience of finding all your typos immediately, rather 
than wait to see the bug symptoms. I think it's good practice to do so; 
sometimes if I'm writing temporary code, or a quick test to see how 
something works, or a short-lived script for my own purposes, I'll turn 
explicitVariables off and enjoy the convenience of not declaring - but 
all important code gets tested, and usually written, using 
explicitVariables.

As far as I know, there is no performance impact.

-- 
Alex Tweedly       http://www.tweedly.net



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