functional way doing array stuff/ lambda functions

[cym13 via Digitalmars-d-learn]

On Saturday, 12 December 2015 at 23:50:55 UTC, Xinok wrote:
> On Saturday, 12 December 2015 at 23:36:43 UTC, cym13 wrote:
>> ...
>> So, in your example:
>>
>> int product(const ref int[] arr) {
>>     import std.array:     array;
>>     import std.algorithm: reduce;
>>
>>     arr = arr.reduce!((p, i) => p*i).array;
>> }
>
> A good post overall but you got reduce wrong. In D, reduce 
> computes and returns the result immediately, not a lazy range. 
> The following code is correct:
>
> int product(const ref int[] arr) {
>     import std.array:     array;
>     import std.algorithm: reduce;
>
>     return arr.reduce!((p, i) => p*i)();
> }
>
> Example: http://dpaste.dzfl.pl/fc2c2eab2d02

Damn, I was certain it acted as the two others of the trio... I 
stand corrected thanks :-)