Thanks. I am glad be wrong on that one.I had a look at map & filter in the source code ; pleased to see they're lazily implemented!
map https://github.com/D-Programming-Language/phobos/blob/master/std/algorithm/iteration.d#L425 filter https://github.com/D-Programming-Language/phobos/blob/master/std/algorithm/iteration.d#L924 I had to look for FilterResult! https://github.com/D-Programming-Language/phobos/blob/master/std/algorithm/iteration.d#L979Small remark: One could make the laziness of filter a bit more clear in the doc though - at least for newbies like me.
http://dlang.org/phobos/std_algorithm_iteration.html Best regards, Guillaume
