What am I doing wrong here - canFind with iota is not working

[Kingsley via Digitalmars-d]

On Thursday, 26 February 2015 at 11:04:58 UTC, Baz wrote:
> On Thursday, 26 February 2015 at 10:55:43 UTC, Kingsley wrote:
>> float oneDegree = (PI / 180.0);
>> float first = -(oneDegree * 10.0);
>> float second = (oneDegree * 10.0);
>> float step = 0.000001;
>> float[] r = iota(first,second,step).array;
>>
>> writeln(r);
>>
>> float item = 0.174531;
>> writeln(r.canFind(item));
>>
>>
>> // returns false for canFind - even though that float is in 
>> the array ???
>
> also mark your float litteral with the f postfix. By default FP 
> litterals are double...IIRC
>
> float oneDegree = (PI / 180.0f);
> float first = -(oneDegree * 10.0f);
> float second = (oneDegree * 10.0f);
> float step = 0.000001f;
> float[] r = iota(first,second,step).array;
>
> writeln(r);
>
> float item = 0.174531f;
> writeln(r.canFind(item));

Adding the f still produces a false result. Also I tried changing 
all to double but still not working - I always get false back. 
Interestingly if I harcode the output of the iota into an array - 
then things start to work as I expect.