Why is size_t unsigned?

[Ali Çehreli]

On 07/22/2013 08:04 AM, monarch_dodra wrote:

 > On Monday, 22 July 2013 at 12:51:31 UTC, Andrej Mitrovic wrote:
 >> On 7/22/13, JS <js.mdnq at gmail.com> wrote:
 >>> foreach doesn't allow you to modify the index to skip over
 >>> elements.
 >>
 >> It does:
 >>
 >> -----
 >> import std.stdio;
 >>
 >> void main()
 >> {
 >>     int[] x = [1, 2, 3, 4, 5];
 >>     foreach (ref i; 0 .. 5)
 >>     {
 >>         writeln(x[i]);
 >>         ++i;
 >>     }
 >> }
 >> -----
 >>
 >> Writes:
 >> 1
 >> 3
 >> 5
 >
 > 99% sure that's unspecified behavior. I wouldn't rely on anything like
 > that.

Two more solutions one with foreach one without any explicit looping:

import std.stdio;
import std.range;

void main()
{
     int[] x = [1, 2, 3, 4, 5];

     foreach (i; iota(0, 5, 2))
     {
         writeln(x[i]);
         ++i;
     }

     writeln(x.indexed(iota(0, x.length, 2)));
}

Ali