diff --git a/.gitignore b/.gitignore
index 8146014..6f69607 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
 functional.gemspec
-pkg
diff --git a/README.md b/README.md
index 1478272..6cf2106 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,3 @@
-Obsolete
-========
-
-Use `#lazy`.
-
 Install
 =======
 
diff --git a/VERSION b/VERSION
index 9faa1b7..b1e80bb 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.1.5
+0.1.3
diff --git a/lib/functional.rb b/lib/functional.rb
index f129e3d..4d2142c 100644
--- a/lib/functional.rb
+++ b/lib/functional.rb
@@ -47,7 +47,6 @@ class Counter
 end
 
 class Functional
-	def self.__version__() '0.1.5' end
 	include Enumerable
 
 	class DEFAULT
@@ -162,11 +161,6 @@ class Functional
 	end
 
 	class Each <Base
-		def each_fun *a
-			@exe.call *a
-		end
-		alias call each_fun
-
 		def end
 			nil
 		end
@@ -219,42 +213,25 @@ class Functional
 			super *a, &exe
 			iv = Array.method :new  if ::Functional::DEFAULT == iv
 			@buf = if iv.kind_of?( ::Proc) || iv.kind_of?( ::Method)
+					p default: :proc, iv: iv
 					Hash.new {|h,k| h[k] = iv.call }
 				else
+					p default: :value, iv: iv
 					{}.tap {|h| h.default = iv }
 				end
 		end
 
-		def reduce_fun k, *a
-			@buf[ k] = @exe.call k, @buf[ k], *a
+		def reduce_fun *a
+			@buf[ a[0]] = @exe.call @buf[ a[0]], *a[1..-1]
 		end
 		alias call reduce_fun
 
 		def end
-			@buf.each &@next.method( :call)
+			@buf.each {|i| @next.call *i}
 			@next.end
 		end
 	end
 
-	class ToHash <Base
-		def initialize
-			super
-			@buf = {}
-		end
-
-		def to_hash_fun k, *a
-			@buf[k] = a
-		end
-		alias call to_hash_fun
-
-		def end
-			@buf
-		end
-
-		def clean
-		end
-	end
-
 	class Slice <Base
 		def initialize n
 			@buf, @n = [], n
@@ -366,7 +343,6 @@ class Functional
 	def filter &exe
 		push Filter.new( &exe)
 	end
-	alias reject filter
 
 	def compact
 		push Compact.new
@@ -386,12 +362,8 @@ class Functional
 
 	def each &exe
 		return self  unless exe
-		push Each.new( &exe)
-		run
-	end
-
-	def to_hash
-		push ToHash.new
+		push Each.new
+		push exe
 		run
 	end
 
@@ -430,21 +402,19 @@ class Functional
 	def with_index &exe
 		i = 0
 		exe ||= Array.method :[]
-		push Collect.new {|*a| exe.call i, *a; i += 1 }
+		push Collect.new {|*a| exe.call i, *a }
 	end
 
-	def slice n, &exe
+	def slice n, &e
 		push Slice.new( n)
-		block_given? ? self.collect( &exe) : self
+		push Collect.new( &e)  if e
+		self
 	end
 
-	def cons n, &exe
+	def cons n, &e
 		push Cons.new( n)
-		block_given? ? self.collect( &exe) : self
-	end
-
-	def tap &exe
-		push Tap.new( &exe)
+		push Collect.new( &e)  if e
+		self
 	end
 
 	class Save < Base
diff --git a/test/functional_test.rb b/test/functional_test.rb
deleted file mode 100644
index 9497c66..0000000
--- a/test/functional_test.rb
+++ /dev/null
@@ -1,29 +0,0 @@
-require 'test/unit'
-require 'functional'
-
-class FunTest < Test::Unit::TestCase
-	M = 0..100
-
-	def doit_fun m, &exe
-		f = m.to_fun
-		yield f
-		f.to_a
-	end
-
-	def test_to_fun_exists
-		assert_respond_to Object, :to_fun
-	end
-
-	def test_to_a
-		assert_equal M.to_a, doit_fun( M) {|x| x }
-	end
-
-	def test_collect
-		l = lambda {|x| x*2}
-		assert_equal M.collect( &l), doit_fun( M) {|x| x.collect( &l) }
-	end
-
-	def test_inject
-		assert_equal M.inject( 0) {|i,j| i+j }, M.to_fun.inject( 0) {|i,j| i+j }
-	end
-end