Merge pull request #590 from kostya/enum_eachs

enumerable#each_cons, each_slice

lib-topaz/enumerable.rb

@@ -272,4 +272,37 @@ def find_index(obj = nil, &block)
     end
     nil
   end
+
+  def each_cons(num, &block)
+    return self.enum_for(:each_cons, num) if !block
+    num = Topaz.convert_type(num, Fixnum, :to_int)
+    raise ArgumentError.new("invalid size") if num <= 0
+    buf = []
+    self.each_with_index do |e, i|
+      buf << e
+      if i == num - 1
+        yield buf.dup
+      elsif i >= num
+        buf.shift
+        yield buf.dup
+      end
+    end
+    nil
+  end
+
+  def each_slice(num, &block)
+    return self.enum_for(:each_slice, num) if !block
+    num = Topaz.convert_type(num, Fixnum, :to_int)
+    raise ArgumentError.new("invalid slice size") if num <= 0
+    buf = []
+    self.each do |e|
+      buf << e
+      if buf.size == num
+        yield buf
+        buf = []
+      end
+    end
+    yield buf unless buf.empty?
+    nil
+  end
 end

spec/tags/core/enumerable/each_cons_tags.txt

@@ -1,7 +1 @@
-fails:Enumerable#each_cons passes element groups to the block
-fails:Enumerable#each_cons raises an Argument Error if there is not a single parameter > 0
-fails:Enumerable#each_cons tries to convert n to an Integer using #to_int
-fails:Enumerable#each_cons works when n is >= full length
-fails:Enumerable#each_cons yields only as much as needed
-fails:Enumerable#each_cons returns an enumerator if no block
 fails:Enumerable#each_cons gathers whole arrays as elements when each yields multiple

spec/tags/core/enumerable/each_slice_tags.txt

@@ -1,7 +1 @@
-fails:Enumerable#each_slice passes element groups to the block
-fails:Enumerable#each_slice raises an Argument Error if there is not a single parameter > 0
-fails:Enumerable#each_slice tries to convert n to an Integer using #to_int
-fails:Enumerable#each_slice works when n is >= full length
-fails:Enumerable#each_slice yields only as much as needed
-fails:Enumerable#each_slice returns an enumerator if no block
 fails:Enumerable#each_slice gathers whole arrays as elements when each yields multiple