LuaDictionary

最新推荐文章于 2024-04-15 13:00:00 发布

qq_41623055

最新推荐文章于 2024-04-15 13:00:00 发布

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分类专栏：笔记

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本文深入探讨了Lua中自定义字典类的实现细节，包括构造、添加、清除、检查键值、计数、迭代及删除操作。通过具体代码示例，读者将了解如何在Lua环境中高效管理和操作键值对集合。

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---@class Dictionary
Dictionary = class()

function Dictionary:ctor()
    self.keyList = {}
end

function Dictionary:Add(key, value)
    if self[key] == nil then
        self[key] = value
        table.insert(self.keyList, key)
    else
        self[key] = value
    end
end

function Dictionary:Clear()
    local count = self:Count()
    for i=count,1,-1 do
        self[self.keyList[i]] = nil
        table.remove(self.keyList)
    end
end

function Dictionary:ContainsKey(key)
    local count = self:Count()
    for i=1,count do
        if self.keyList[i] == key then
            return true
        end
    end
    return false
end

function Dictionary:ContainsValue(value)
    local count = self:Count()
    for i=1,count do
        if self[self.keyList[i]] == value then
            return true
        end
    end
    return false
end

function Dictionary:Count()
    return table.length(self.keyList)
end

function Dictionary:Iter()
    local i = 0
    local n = self:Count()
    return function ()
        i = i + 1
        if i <= n then
            return self.keyList[i]
        end
        return nil
    end
end

function Dictionary:Remove(key)
    if self:ContainsKey(key) then
        local count = self:Count()
        for i=1,count do
            if self.keyList[i] == key then
                table.remove(self.keyList, i)
                break
            end
        end
        self[key] = nil
    end
end