Merge pull request #574 from kostya/one

 enumerable#one?,none?

lib-topaz/enumerable.rb

@@ -238,4 +238,19 @@ def count(*args, &block)
     end
     c
   end
+
+  def one?(&block)
+    c = 0
+    self.each do |e|
+      c += 1 if block ? yield(e) : e
+    end
+    c == 1
+  end
+
+  def none?(&block)
+    self.each do |e|
+      return false if block ? yield(e) : e
+    end
+    true
+  end
 end

spec/tags/core/enumerable/none_tags.txt

@@ -1,9 +1,2 @@
-fails:Enumerable#none? returns true if none of the elements in self are true
-fails:Enumerable#none? returns false if at least one of the elements in self are true
 fails:Enumerable#none? gathers whole arrays as elements when each yields multiple
-fails:Enumerable#none? with a block passes each element to the block in turn until it returns true
-fails:Enumerable#none? with a block stops passing elements to the block when it returns true
-fails:Enumerable#none? with a block returns true if the block never returns true
-fails:Enumerable#none? with a block returns false if the block ever returns true
-fails:Enumerable#none? with a block gathers initial args as elements when each yields multiple
 fails:Enumerable#none? with a block yields multiple arguments when each yields multiple

spec/tags/core/enumerable/one_tags.txt

@@ -1,9 +1,2 @@
-fails:Enumerable#one? when passed a block returns true if block returns true once
-fails:Enumerable#one? when passed a block returns false if the block returns true more than once
-fails:Enumerable#one? when passed a block returns false if the block only returns false
-fails:Enumerable#one? when passed a block gathers initial args as elements when each yields multiple
 fails:Enumerable#one? when passed a block yields multiple arguments when each yields multiple
-fails:Enumerable#one? when not passed a block returns true if only one element evaluates to true
-fails:Enumerable#one? when not passed a block returns false if two elements evaluate to true
-fails:Enumerable#one? when not passed a block returns false if all elements evaluate to false
 fails:Enumerable#one? when not passed a block gathers whole arrays as elements when each yields multiple