std.algorithm: Add a small neat in-place example for uniq

dlang · Nov 2, 2014 · 90bf9dc · 90bf9dc
1 parent af0629e
commit 90bf9dc
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/std/algorithm.d b/std/algorithm.d
@@ -4258,6 +4258,10 @@ unittest
 {
     int[] arr = [ 1, 2, 2, 2, 2, 3, 4, 4, 4, 5 ];
     assert(equal(uniq(arr), [ 1, 2, 3, 4, 5 ][]));
+
+    // Filter duplicates in-place using copy
+    arr.length -= arr.uniq().copy(arr).length;
+    assert(arr == [ 1, 2, 3, 4, 5 ]);
 }
 
 private struct UniqResult(alias pred, Range)