Added __pairs method to Iterables

libs/iterables/Cache.lua

@@ -20,6 +20,10 @@ function Cache:__init(array, constructor, parent)
 	self._parent = parent
 end
 
+function Cache:__pairs()
+	return next, self._objects
+end
+
 function Cache:__len()
 	return self._count
 end

libs/iterables/Iterable.lua

@@ -12,10 +12,18 @@ general purpose data structure with features that are better suited for an
 object-oriented environment.
 
 Note: All sub-classes must implement their own `__init` and `iter` methods.
-Additionally, more efficient versions of `__len` and `get` methods can be
-redefined in sub-classes.
+Additionally, more efficient versions of `__len`, `__pairs`, and `get` methods
+can be redefined in sub-classes.
 ]]
 
+function Iterable:__pairs()
+	return wrap(function()
+		for obj in self:iter() do
+			yield(obj:__hash(), obj)
+		end
+	end)
+end
+
 function Iterable:__len()
 	local n = 0
 	for _ in self:iter() do

libs/iterables/SecondaryCache.lua

@@ -20,6 +20,10 @@ function SecondaryCache:__init(array, primary)
 	self._primary = primary
 end
 
+function SecondaryCache:__pairs()
+	return next, self._objects
+end
+
 function SecondaryCache:__len()
 	return self._count
 end