* enum.c (nmin_run): max(n) and max_by(n) returns an array in

  descending order.
  [ruby-core:65452] Suggested by David Grayson.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47907 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

Author: akr

ChangeLog

@@ -1,3 +1,9 @@
+Tue Oct 14 01:27:54 2014  Tanaka Akira  <akr@fsij.org>
+
+	* enum.c (nmin_run): max(n) and max_by(n) returns an array in
+	  descending order.
+	  [ruby-core:65452] Suggested by David Grayson.
+
 Mon Oct 13 20:44:49 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* common.mk (update-gems): chdir to the target directory and then

enum.c

@@ -1284,6 +1284,9 @@ nmin_run(VALUE obj, VALUE num, int by, int rev)
 	ruby_qsort(RARRAY_PTR(result), RARRAY_LEN(result), sizeof(VALUE),
 		   data.cmpfunc, (void *)&data);
     }
+    if (rev) {
+        rb_ary_reverse(result);
+    }
     *((VALUE *)&RBASIC(result)->klass) = rb_cArray;
     return result;
 

test/ruby/test_enum.rb

@@ -245,8 +245,8 @@ def test_max
     assert_equal("horse", ary.max)
     assert_equal("albatross", ary.max {|a,b| a.length <=> b.length })
     assert_equal(1, [3,2,1].max{|a,b| b <=> a })
-    assert_equal(%w[dog horse], ary.max(2))
-    assert_equal(%w[horse albatross],
+    assert_equal(%w[horse dog], ary.max(2))
+    assert_equal(%w[albatross horse],
                  ary.max(2) {|a,b| a.length <=> b.length })
   end
 
@@ -278,7 +278,7 @@ def test_max_by
     a = %w(albatross dog horse)
     assert_equal("albatross", a.max_by {|x| x.length })
     assert_equal(1, [2,3,1].max_by {|x| -x })
-    assert_equal(%w[horse albatross], a.max_by(2) {|x| x.length })
+    assert_equal(%w[albatross horse], a.max_by(2) {|x| x.length })
   end
 
   def test_minmax_by

test/ruby/test_range.rb

@@ -81,8 +81,8 @@ def test_max
     assert_equal(0, (0..0).max)
     assert_equal(nil, (0...0).max)
 
-    assert_equal([8,9,10], (0..10).max(3))
-    assert_equal([7,8,9], (0...10).max(3))
+    assert_equal([10,9,8], (0..10).max(3))
+    assert_equal([9,8,7], (0...10).max(3))
   end
 
   def test_initialize_twice