eliminate cast

[Nick Sabalausky]

"downs" <default_357-line at yahoo.de> wrote in message 
news:g0f48g$19jh$1 at digitalmars.com...
> Dee Girl wrote:
>> There is a file data.txt with numbers:
>>
>> 345
>> 5467
>> 45
>> 238
>> ...
>>
>> And I want to load into an array of uint like this.
>>
>> auto sizes = map!
>>     (to!(uint, string))
>>     (compose!(split, q{cast(string) std.file.read(a)})("data.txt"));
>>
>> It works but cast is always bad ^_^.
>
> Where did you get that idea?
> In this case, basically, we know the file is really text. So we put this 
> knowledge into code by assuring the compiler that yes, the arbitrary data 
> you've just read _is_ text after all.
> In any case, it's just a reinterpreting cast. It doesn't change any actual 
> data. So no time lost.
>
> Also, just fyi, here's how that code would look like in tools.functional:
>
> gentoo-pc ~ $ cat test2.d; echo -----; rebuild test2.d -oftest2 && ./test2
> module test2;
> import std.stdio, std.file, tools.functional, std.string: split, atoi;
> void main() {
>  auto sizes = (cast(string) "test.txt".read()).split() /map/ &atoi;
>  writefln(sizes);
> }
> -----
> [345,5467,45,238]
>
>
> I still prefer infix ^^

Where is "tools.functional" from? I don't see it in phobos, tango, cashew, 
dsource, wiki4d, google, or the D newsgroups.