On 10/24/10 14:55 CDT, Simen kjaeraas wrote:
On Sun, 24 Oct 2010 21:39:24 +0200, bearophile
<[email protected]> 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.
This is coming full circle. At a point, map _did_ support multiple
ranges. Some people found that non-modular - if you want multiple
ranges, you should use map with zip...
Andrei
