optimization of list comprehensions

[Mats Cronqvist]

Torbjorn Tornkvist wrote:
> Mats Cronqvist wrote:
> 
>>   here's the thing. the list comprehensions were introduced for no 
>> good reason, in that they added nothing that you could not already do. 
> 
> 
> Hm...as I remember it; they were introduced because of Mnemosyne.

   in order to do what? i.e. is there anything that cannot be done without list 
comprehensions? (i've never used mnemosyne).

   mats