UGCProjects/FX_Preview/Script/Global/FunctionExtension/TableExtension.lua

-- 拷贝table
function table.DeepCopy(object)
    -- 已经复制过的table，key为复制源table，value为复制后的table
    -- 为了防止table中的某个属性为自身时出现死循环
    -- 避免本该是同一个table的属性，在复制时变成2个不同的table(内容同，但是地址关系和原来的不一样了)
    local lookup_table = {}
    local function _copy(object)
        if type(object) ~= 'table' then -- 非table类型都直接返回
            return object
        elseif lookup_table[object] then
            return lookup_table[object]
        end
        local new_table = {}
        lookup_table[object] = new_table
        for k, v in pairs(object) do
            new_table[_copy(k)] = _copy(v)
        end
        -- 这里直接拿mt来用是因为一般对table操作不会很粗暴的修改mt的相关内容
        return setmetatable(new_table, getmetatable(object))
    end
    return _copy(object)
end

function table.NewLuaObj(InObj)
    return setmetatable({}, {
			__index = InObj,
			__metatable = InObj,
		})
end

---获取表元素个数
function table.getCount(t)
    if type(t) ~= "table" then
        return -1
    end
    local Length = 0
    for i, v in pairs(t) do
        Length = Length + 1
    end
    return Length
end

---获取表中所有的Key
function table.getKeys(t)
    if type(t) ~= "table" then
        return {}
    end
    local keys = {}
    for k,v in pairs(t) do
        keys[#keys + 1] = k
    end
    return keys
end

---获取对应元素的Index
function table.getIndex(t, v)
    if type(t) ~= "table" then
        return nil
    end
    for index, value in pairs(t) do
        if value == v then
            return index
        end
    end
    return nil
end

---获取表中是否有对应Key
function table.hasKey(t, k)
    if type(t) ~= "table" then
        return false
    end
    for key, value in pairs(t) do
        if k == key then
            return true
        end
    end
    return false
end

---按Key删除表中元素
function table.removeKey(t, k)
    if t == nil then
		return nil
	end
	local v = t[k]
	t[k] = nil
    return v
end

---获取表中是否有对应的Value
function table.hasValue(t, value)
    if t == nil then return false end
    for k, v in pairs(t) do
        if v == value then
            return true
        end
    end
    return false
end

---按Value删除表中元素
function table.removeValue(t, value, removeAll)
    local deleteNum = 0
    local i = 1
    local max = table.getCount(t)

    while i <= max do
        if t[i] == value then
            table.remove(t,i)
            deleteNum = deleteNum + 1 
            i = i - 1
            max = max - 1
            if not removeAll then break end
        end
        i = i + 1
    end
    return deleteNum
end

---返回是否是空表
function table.isEmpty(t)
    if type(t) ~= "table" then
        return true
    end
    return next(t) == nil
end



function table.Rand(t)
    if type(t) ~= "table" or #t <= 0 then return nil end
    return t[math.random(1, #t)]
end

function table.GetMaxValueResKey(t, fun)
    if fun == nil then fun = function(p1, p2) return p1 < p2 end end
    if type(t) ~= "table" or type(fun) ~= "function" or table.getCount(t) <= 0 then return end
    local res = nil
    for k, v in pairs(t) do
        if not res or fun(t[res], v) then
            res = k
        end
    end
    return res
end

function table.FindKey(t, value)
    if type(t) ~= "table"  then return nil end
    for k, v in pairs(t) do
        if v == value then return k end
    end
    return nil
end

function table.GetMaxValue(t)
    if type(t) ~= "table"  then return nil end
    local Res = nil
    for k, v in pairs(t) do
        if Res == nil then Res = v
        elseif Res < v then Res = v
        end 
    end
    return Res
end



function table.Swap(t, i, k)
    if type(t) ~= "table" then
        return false
    end
    local temp = t[i]
    t[i] = t[k]
    t[k] = temp
end

--- 打乱整个table 洗牌算法 
function table.Shuffle(t)
    if type(t) ~= "table" then
        return false
    end
    for i = 1, #t - 1 do
        local SwapIndex = math.random(i + 1, #t)
        table.Swap(t, i, SwapIndex)
    end
end

--- 判断table相等
function table.tablesEqual(table1, table2)
    -- 检查table1和table2是否为同一个table
    if table1 == table2 then
        return true
    end

    -- 检查table类型
    if type(table1) ~= 'table' or type(table2) ~= 'table' then
        return false
    end

    -- 检查table1中的键值对是否在table2中
    for key, value in pairs(table1) do
        if type(value) == 'table' then
            if not tablesEqual(value, table2[key]) then
                return false
            end
        else
            if table2[key] ~= value then
                return false
            end
        end
    end

    -- 检查table2中是否有table1中没有的键
    for key in pairs(table2) do
        if table1[key] == nil then
            return false
        end
    end

    return true
end

--- 判断table集合相等
function table.collectionsEqual(collection1, collection2)
    local count1 = 0
    local count2 = 0

    -- 计算第一个集合的大小
    for _ in pairs(collection1) do
        count1 = count1 + 1
    end

    -- 计算第二个集合的大小
    for _ in pairs(collection2) do
        count2 = count2 + 1
    end

    -- 如果大小不同，则集合不同
    if count1 ~= count2 then
        return false
    end

    -- 检查collection1中的每个元素是否也在collection2中
    for key1, value1 in pairs(collection1) do
        local found = false
        for key2, value2 in pairs(collection2) do
            if value1 == value2 then
                found = true
                break
            end
        end
        if not found then
            return false
        end
    end

    return true
end