Correct use of map

[bearophile]

Dfr:

> Here is few code eaxamples, i don't know why it is doesn't work 
> as expected.
>
> Here i want to transform string into list of tuples split by 
> character:
>
> auto nameparts = splitter("go.home", '.').map!(v => 
> tuple(v,0)).array;
>
> This gives me not very useful message about assert and stuff:
> core.exception.AssertError at std.algorithm(1942): Assertion 
> failure

It works for me:


void main() {
     import std.stdio, std.algorithm, std.typecons, std.range;

     auto nameParts = "go.home"
                      .splitter('.')
                      .map!(v => tuple(v, 0))
                      .array;

     nameParts.writeln;
}


Output:

[Tuple!(string, int)("go", 0), Tuple!(string, int)("home", 0)]

I am using dmd 2.065alpha on Windows.

Bye,
bearophile