Charakterbewegungen hinzugefügt, Deko hinzugefügt, Kochrezepte angepasst

mods/futil/data_structures/deque.lua

@@ -0,0 +1,88 @@
+-- inspired by https://www.lua.org/pil/11.4.html
+
+local Deque = futil.class1()
+
+function Deque:_init(def)
+	self._a = 0
+	self._z = -1
+	self._m = def and def.max_size
+end
+
+function Deque:size()
+	return self._z - self._a + 1
+end
+
+function Deque:push_front(value)
+	local max_size = self._m
+	if max_size and (self._z - self._a + 1) >= max_size then
+		return false
+	end
+	local a = self._a - 1
+	self._a = a
+	self[a] = value
+	return true, a
+end
+
+function Deque:peek_front()
+	return self[self._a]
+end
+
+function Deque:pop_front()
+	local a = self._a
+	if a > self._z then
+		return nil
+	end
+	local value = self[a]
+	self[a] = nil
+	self._a = a + 1
+	return value
+end
+
+function Deque:push_back(value)
+	local max_size = self._m
+	if max_size and (self._z - self._a + 1) >= max_size then
+		return false
+	end
+	local z = self._z + 1
+	self._z = z
+	self[z] = value
+	return true, z
+end
+
+function Deque:peek_back()
+	return self[self._z]
+end
+
+function Deque:pop_back()
+	local z = self._z
+	if self._a > z then
+		return nil
+	end
+	local value = self[z]
+	self[z] = nil
+	self._z = z + 1
+	return value
+end
+
+-- this iterator is kinda wonky, and the behavior may be changed in the future.
+-- unexpected behavior may result from modifying a deque *while* iterating it.
+-- note that you *cannot* iterate the deque directly using `pairs()` because of e.g. "_a" and "_z"
+function Deque:iterate()
+	local i = self._a - 1
+	return function()
+		i = i + 1
+		return self[i]
+	end
+end
+
+function Deque:clear()
+	for k in pairs(self) do
+		if type(k) == "number" then
+			self[k] = nil
+		end
+	end
+	self._a = 0
+	self._z = -1
+end
+
+futil.Deque = Deque