array.c: Array#append and Array#prepend

* array.c (Init_Array): Add alias "append" to Array#push, and
  "prepend" to Array#unshift.  [Feature #12746] [Fix GH-1574]

Author:    pascbjumper2 <stowers.joshua@live.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58227 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

array.c

@@ -6166,9 +6166,11 @@ Init_Array(void)
     rb_define_method(rb_cArray, "concat", rb_ary_concat_multi, -1);
     rb_define_method(rb_cArray, "<<", rb_ary_push, 1);
     rb_define_method(rb_cArray, "push", rb_ary_push_m, -1);
+    rb_define_alias(rb_cArray,  "append", "push");
     rb_define_method(rb_cArray, "pop", rb_ary_pop_m, -1);
     rb_define_method(rb_cArray, "shift", rb_ary_shift_m, -1);
     rb_define_method(rb_cArray, "unshift", rb_ary_unshift_m, -1);
+    rb_define_alias(rb_cArray,  "prepend", "unshift");
     rb_define_method(rb_cArray, "insert", rb_ary_insert, -1);
     rb_define_method(rb_cArray, "each", rb_ary_each, 0);
     rb_define_method(rb_cArray, "each_index", rb_ary_each_index, 0);

doc/contributors.rdoc

@@ -600,6 +600,9 @@ Richard M. Stallman
 Robin Stocker
 * documentation
 
+Joshua Stowers
+* a patch for array.c
+
 Adam Strzelecki
 * a patch for compile.c
 

test/ruby/test_array.rb

@@ -443,6 +443,17 @@ class TestArray < Test::Unit::TestCase
     assert_equal([1, 2], a)
   end
 
+  def test_append
+    a = @cls[1, 2, 3]
+    assert_equal(@cls[1, 2, 3, 4, 5], a.append(4, 5))
+    assert_equal(@cls[1, 2, 3, 4, 5, nil], a.append(nil))
+
+    a.append
+    assert_equal @cls[1, 2, 3, 4, 5, nil], a
+    a.append 6, 7
+    assert_equal @cls[1, 2, 3, 4, 5, nil, 6, 7], a
+  end
+
   def test_assoc
     a1 = @cls[*%w( cat feline )]
     a2 = @cls[*%w( dog canine )]
@@ -1204,6 +1215,14 @@ class TestArray < Test::Unit::TestCase
     assert_equal(@cls[], a)
   end
 
+  def test_prepend
+    a = @cls[]
+    assert_equal(@cls['cat'], a.prepend('cat'))
+    assert_equal(@cls['dog', 'cat'], a.prepend('dog'))
+    assert_equal(@cls[nil, 'dog', 'cat'], a.prepend(nil))
+    assert_equal(@cls[@cls[1,2], nil, 'dog', 'cat'], a.prepend(@cls[1, 2]))
+  end
+
   def test_push
     a = @cls[1, 2, 3]
     assert_equal(@cls[1, 2, 3, 4, 5], a.push(4, 5))