@@ -18,13 +18,41 @@
 	for i,v in pairs(t) do new[i] = v end
 	setmetatable(new,getmetatable(t))
 	return new
 end
+
+fn.deepcopy = table.copy or function(t)
+	new = {}
+	for k,v in pairs(t) do
+		if type(v) == 'table' then
+			new[k] = fn.deepcopy(v)
+		else
+			new[k] = v
+		end
+	end
+	return new
+end
 
 fn.merge = function(base,override)
 	local new = fn.copy(base)
 	for k,v in pairs(override) do
 		new[k] = v
+	end
+	return new
+end
+
+fn.deepmerge = function(base,override)
+	local new = {}
+	local keys = fn.merge(fn.keys(base),fn.keys(override))
+	for _,k in pairs(keys) do
+		if type(base[k]) == 'table' and
+		   type(override[k]) == 'table' then
+			new[k] = fn.deepmerge(base[k], override[k])
+		elseif override[k] then
+			new[k] = override[k]
+		else
+			new[k] = base[k]
+		end
 	end
 	return new
 end
 
@@ -108,6 +136,18 @@
 		end
 	end
 	return acc
 end
+
+fn.walk = function(tbl,path)
+	if type(path) == 'table' then
+		for _,p in pairs(path) do
+			if tbl[p] == nil then return nil end
+			tbl = tbl[p]
+		end
+	else
+		tbl = tbl[path]
+	end
+	return tbl
+end
 
 return fn