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Delete list.lua
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1 changed files with 0 additions and 75 deletions
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local List = {}
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local mt = {__index = List}
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--- Creates a new List.
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-- @return A new list
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function List.new()
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return setmetatable({
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objects = {},
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pointers = {},
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size = 0,
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}, mt)
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end
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--- Clears the List completely.
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-- @return self
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function List:clear()
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self.objects = {}
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self.pointers = {}
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self.size = 0
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return self
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end
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--- Adds an object to the List.
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-- @param obj The object to add
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-- @return self
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function List:add(obj)
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local size = self.size + 1
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self.objects[size] = obj
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self.pointers[obj] = size
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self.size = size
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return self
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end
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--- Removes an object from the List.
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-- @param obj The object to remove
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-- @return self
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function List:remove(obj)
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local index = self.pointers[obj]
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local size = self.size
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if index == size then
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self.objects[size] = nil
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else
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local other = self.objects[size]
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self.objects[index] = other
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self.pointers[other] = index
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self.objects[size] = nil
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end
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self.pointers[obj] = nil
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self.size = size - 1
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end
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--- Gets an object by numerical index.
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-- @param index The index to look at
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-- @return The object at the index
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function List:get(index)
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return self.objects[index]
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end
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--- Gets if the List has the object.
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-- @param obj The object to search for
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-- @param true if the list has the object, false otherwise
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function List:has(obj)
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return self.pointers[obj] and true
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end
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return setmetatable(List, {
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__call = function() return List.new() end,
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})
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