Key and value with ranges

[Joel]

On Monday, 2 October 2023 at 02:47:37 UTC, Joel wrote:
> ```d
> import std;
>
> auto data=“I went for a walk, and fell down a hole.”;
>
> void main(string[] args) {
>     int[string] dic;
>     struct WordCnt {
>         string word;
>         ulong count;
>         string toString() const {
>             return text("Word: ", word, " - number of 
> instances: ", count);
>         }
>     }
>     WordCnt[] wc;
>     data
>         .map!(c => lowercase.canFind(std.uni.toLower(c)) ? c : 
> ' ')
>         .to!string
>         .splitter
>         .each!(d => dic[d]+=1);
>     foreach(key, value; dic)
>         wc~=WordCnt(key, value);
>     wc.sort!"a.count>b.count".each!writeln;
> }
> ```
>
> How can I improve this code? Like avoiding using foreach.

This is what I've got so far. Is there a way to do it any better?

```d
import std;

auto data="I went for a walk, and fell down a hole.";

void main() {
     int[string] aa;
     struct WordCnt {
         string word;
         ulong count;
         string toString() const {
             return text("Word: ", word, " - number of instances: 
", count);
         }
     }
     WordCnt[] wc;
     data
         .map!(c => lowercase.canFind(std.uni.toLower(c)) ? c : ' 
')
         .to!string
         .splitter
         .each!(d => aa[d]+=1);
     aa.each!((key, value) {
             wc~=WordCnt(key, value);
     });
     wc.sort!"a.count>b.count"
         .each!writeln;
}
```