Merge pull request #15276 from kuldeepaggarwal/fix-array-to

Array#to now accept negative position also.

activesupport/lib/active_support/core_ext/array/access.rb

@@ -17,8 +17,10 @@ def from(position)
   #   %w( a b c d ).to(2)  # => ["a", "b", "c"]
   #   %w( a b c d ).to(10) # => ["a", "b", "c", "d"]
   #   %w().to(0)           # => []
+  #   %w( a b c d ).to(-2) # => ["a", "b", "c"]
+  #   %w( a b c ).to(-10)  # => []
   def to(position)
-    first position + 1
+    self[0..position]
   end
 
   # Equal to <tt>self[1]</tt>.

activesupport/test/core_ext/array_ext_test.rb

@@ -18,6 +18,8 @@ def test_to
     assert_equal %w( a ), %w( a b c d ).to(0)
     assert_equal %w( a b c ), %w( a b c d ).to(2)
     assert_equal %w( a b c d ), %w( a b c d ).to(10)
+    assert_equal %w( a b c ), %w( a b c d ).to(-2)
+    assert_equal %w(), %w( a b c ).to(-10)
   end
 
   def test_second_through_tenth