Alternate signs in a range

[Stanislav Blinov]

On Sunday, 26 January 2014 at 12:50:05 UTC, matovitch wrote:
> Hello !
>
> I got a problem which I'm sure can be solved by a smart one 
> liner. I would like to obtain the term by term product of a 
> given range by the infinite cyclic range cycle([1,-1]). How can 
> I do that ?

dpaste seems to be somewhat slow.

import std.range;
import std.algorithm;
import std.stdio;

void main() {

	auto myRange = iota(0,10);

	foreach(e; myRange.zip(cycle([1,-1])).map!(a => a[0]*a[1]))
		writeln(e);

}

Like this?