foreach loop

[Edwin van Leeuwen via Digitalmars-d-learn]

On Tuesday, 3 November 2015 at 15:29:31 UTC, Namal wrote:
>> writefln("Count is: %s", arr
>>   .filter!(a => a==true)
>>   .sum);
>>
>> // Note: std.algorithm.sum is the same as
>> // std.algorithm.reduce!((a,b)=a+b);
>

Shouldn't you be using walkLength instead of sum, since you are 
counting the left over values?

import std.range : walkLength;
writefln("Count is: %s", arr
   .filter!(a => a==false)
   .walkLength);