1.8.7: Hash#hash and Hash#eql? are not specialized in Ruby 1.8.6! Fix…

… that (except for recursive structures)

VERSION.yml

@@ -1,5 +1,5 @@
 --- 
 :major: 1
 :minor: 13
-:patch: 0
+:patch: 1
 :build: 

backports.gemspec

@@ -5,11 +5,11 @@
 
 Gem::Specification.new do |s|
   s.name = %q{backports}
-  s.version = "1.13.0"
+  s.version = "1.13.1"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Marc-Andr\303\251 Lafortune"]
-  s.date = %q{2010-01-20}
+  s.date = %q{2010-01-22}
   s.description = %q{      Essential backports that enable some of the really nice features of ruby 1.8.7, ruby 1.9 and rails from ruby 1.8.6 and earlier.
 }
   s.email = %q{github@marc-andre.ca}

lib/backports/1.8.7/hash.rb

@@ -18,6 +18,24 @@ def [](*args)
     end
   end
 
+  # Ruby 1.8.6 doesn't define a Hash specific hash method
+  def hash
+    h = 0
+    each do |key, value|
+      h ^= key.hash ^ value.hash
+    end
+    h
+  end unless {}.hash == {}.hash
+
+  # Ruby 1.8.6 doesn't define a Hash specific eql? method.
+  def eql?(other)
+    other.is_a?(Hash) &&
+      size == other.size &&
+      all? do |key, value|
+        other.fetch(key){return false}.eql?(value)
+      end
+  end unless {}.eql?({})
+
   Backports.make_block_optional self, :delete_if, :each, :each_key, :each_pair, :each_value, :reject, :reject!, :select, :test_on => {:hello => "world!"}
 
   # Standard in Ruby 1.8.7+. See official documentation[http://ruby-doc.org/core-1.9/classes/Hash.html]