Improving std.range.Zip

[Simen kjaeraas]

On Sun, 24 Oct 2010 21:39:24 +0200, bearophile <bearophileHUGS at lycos.com>  
wrote:

> Tomek S.:
>
>> map!((a) {return myNaryFun(a._0, a._1, ...); })(zip(range1, range2,  
>> ...));
>
> Currently the docs of std.algorithm.map say:
>
>> Multiple functions can be passed to map. In that case, the element type  
>> of map  is a tuple containing one element for each function.<
>
> But lot of time ago I have said that in my opinion that's not the best  
> design. Python has a different design, its map does what you want, you  
> may write your code in Python as:
>
> map(myNaryFun, range1, range2, ...)
>
> An example (Python 2.6):
>
>>>> a = ["a", "b", "c", "d"]
>>>> b = [1, 2, 3, 4]
>>>> map(lambda c,n: c * n, a, b)
> ['a', 'bb', 'ccc', 'dddd']
>
> Is is possible to change the std.algorithm.map to a semantics similar to  
> the Python one, that I think is more useful?

 From what I can see, map currently simply doesn't support passing it
multiple ranges. It would be a trivial change to let it support multiple
ranges in addition to multiple functions.


-- 
Simen