How to loop through characters of a string in D language?

[Ola Fosheim Grøstad]

On Friday, 10 December 2021 at 18:47:53 UTC, Stanislav Blinov 
wrote:
> Oooh, finally someone suggested to preallocate storage for all 
> these reinventions of the wheel :D

```
import std.stdio;

char[] dontdothis(string s, int i=0, int skip=0){
     if (s.length == i) return new char[](i - skip);
     if (s[i] == ';') return dontdothis(s, i+1, skip+1);
     auto r = dontdothis(s, i+1, skip);
     r[i-skip] = s[i];
     return r;
}

int main() {
     string s = "abc;def;ab";
     string s_new = cast(string)dontdothis(s);
     writeln(s_new);
     return 0;
}
```