remove list elements..

[Marc 'BlackJack' Rintsch]

On Fri, 05 Oct 2007 11:45:07 -0400, Steve Holden wrote:

> chris.monsanto at gmail.com wrote:
>> On Oct 5, 10:27 am, Abandoned <best... at gmail.com> wrote:
>>> Hi..
>>> I have a problem..
>>> list1=[11, 223, 334, 4223...] 1 million element
>>> list2=[22,223,4223,2355...] 500.000 element
>>>
>>> I want to difference list1 to list2 but order very importent..
>>>
>>> My result must be:
>>> list3=[11,334,...]
>>>
>>> I do this use FOR easly but the speed very imported for me. I want to
>>> the fastest method please help me.
>> 
>> Research the "set" data type. :)
>> 
> Probably not a very helpful suggestion given that ordering is stated to 
> be very important.

A `set()` can be part of such a solution.

Ciao,
	Marc 'BlackJack' Rintsch