[OT] Converting booleans to numbers

[Mark]

On Wednesday, 20 September 2017 at 19:25:58 UTC, Timon Gehr wrote:
>
> Actually, it is useful enough to have a Wikipedia page:
> https://en.wikipedia.org/wiki/Iverson_bracket
>
> Example of a good use:
>
> void floodFill(dchar[][] data,dchar c,int i,int j) {
>     void dfs(int a, int b) {
>         if (a<0 || a >= data.length) return;
>         if (b<0 || b >= data[a].length) return;
>         if (data[a][b] == c) return;
>         data[a][b] = c;
>         foreach(i; 0 .. 4){
>             dfs(a + (i==0) - (i==1),
>                 b + (i==2) - (i==3));
>         }
>     }
>     dfs(i, j);
> }

I would rather use an explicit function for such use cases:

int delta(bool x) { return x == true ? 1 : 0; }