Bulls and cows: Difference between revisions

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@@ Line 695: / Line 695: @@
   enum size = 4;
   immutable ddigits = "123456789"d;
-  //immutable chosen = ddigits.randomCover.take(size).array;
+  immutable chosen = ddigits.randomCover.take(size).array;
-  const chosen = ddigits.randomCover(rndGen).take(size).array;
   writeln("Guess a number composed of ", size,
           " unique digits from 1 to 9 in random order.");
@@ Line 708: / Line 707: @@
       guess = readln.strip.dtext;
       if (guess.countchars(ddigits) == size &&
-          guess.dup.sort().uniq.walkLength == size)
+          guess.dup.sort().uniq.count == size)
         break;
       writefln("I need %d unique digits from 1 to 9, no spaces", size);
@@ Line 718: / Line 717: @@
     }
-    immutable bulls = zip(guess, chosen).count!q{ a[0] == a[1] };
+    immutable bulls = guess.zip(chosen).count!q{ a[0] == a[1] };
-    immutable cows = iota(size)
+    immutable cows = size.iota
                      .count!(i => guess[i] != chosen[i] &&
                                   chosen.canFind(guess[i]));