Iterating through two lists

[Mats Kindahl]

jb <jblazi at hotmail.com> writes:

> I have two lists, x and y with the property len(x) = len(y).
> 
> I should like to achive this (x is a list of class instances)
> 
>   for (a,b) in (x,y): a.f(b)
> 
> Is there a fancy way of doing this or have I to introduce an auxillary 
> counter (that is very easy but maybe not very "lispy", that is 
> "python-like").

"zip", as in:

    for (a,b) in zip(x,y): a.f(b)

I belive the function is coming from Haskell. That's at least where I
saw it first. Maybe somebody can confirm or deny that?

Best wishes,

-- 
Mats Kindahl, IAR Systems, Sweden

Any opinions expressed are my own, not my company's.