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Re: For Loop and Array related


In article <d8rhni$i8c$1 at smc.vnet.net>,
 Andrzej Kozlowski <andrzej at akikoz.net> wrote:

> One more thing. I have no idea why
> 
> << discretemath`
> 
> loads all discrete math packages. 

I use this construct all the time. Actually, it does _not_ load the 
packages -- it just loads the package Stubs 

> I noticed Maxim doing so I tried it and it worked this but I don't think
> it is a documented feature. Does anyone know?

Look up Stub in the Help Browser. There it says that

  Stub is an attribute which specifies that if a symbol is ever used, 
  Needs should automatically be called on the context of the symbol. 

This is used in all the StandardPackages.

> Of course what really is needed above is only the Combinatorica  
> package and the normal, documented way of reading it in is
> 
> <<DiscreteMath`Combinatorica`

Using Stub, only this package gets loaded.

Cheers,
Paul

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