Added #until's sister method, #from.

lib/time_ext/core_ext/time/iterations.rb

@@ -25,7 +25,7 @@ class Time
     end
   end
   
-  # Used togeter with #each to specify end of interation.
+  # Used togeter with #each and other iteration methods to specify end of interation.
   def until(time, &block)
     time = time.to_time if time.is_a?(::Date)
     @until = time
@@ -34,6 +34,17 @@ class Time
   end
   alias :till :until
   
+  # Used together with #each and other interation methods to specify start of iteration, and end will be current object.
+  def from(time, &block)
+    time = time.to_time if time.is_a?(::Date)
+    method, args = @method_chain.pop if block_given?
+    if !method.nil?
+      time.until(self).send(method, *args, &block)
+    else
+      time.until(self)
+    end
+  end
+  
   # Executes passed block for each "unit" of time specified, with a new time object for each interval passed to the block.
   def each(unit, options = {}, &block)
     iterate(unit, options.merge(:map_result => false), &block)

spec/time_iterations_spec.rb

@@ -60,4 +60,10 @@ describe "Time Iterations" do
     @now.until(@now - 6.hours).map_each(:hour) { |time| time }.should == match
   end
   
+  it "should iterate over time objects with #map_each and #from via method chaining" do
+    match = (1..6).map { |i| @now + i.hours }
+    (@now + 6.hours).map_each_hour.from(@now) { |time| time }.should == match
+    (@now + 6.hours).from(@now).map_each(:hour) { |time| time }.should == match
+  end
+  
 end