从表格中获取所有数据名称

时间:2018-10-12 22:48:43

标签: lua traversal lua-table

我的lua文件中有一个嵌套的全局变量表,例如

GLOBAL.ADVANTAGES = 
{
CLASS =
{
    WARRIOR =
    {
        ATTACK = 0,
        DEFEND = 0,
        CRIT_CHANCE = 0,
        CRIT_DAMAGE = 0
    },
    PALADIN =
    {
        ATTACK = 0,
        DEFEND = 0,
        CRIT_CHANCE = 0,
        CRIT_DAMAGE = 0
    },
    PRIEST =
    {
        ATTACK = 0,
        DEFEND = 0,
        CRIT_CHANCE = 0,
        CRIT_DAMAGE = 0
    },
    ...
...

我想遍历表以返回字符串中的所有变量名,例如“ GLOBAL.CLASS.PRIEST.ATTACK”,“ GLOBAL.CLASS.PRIEST.DEFENSE”,等等。我已经可以遍历整个表了,但是它只返回“ ATTACK”,“ DEFENSE”等值。

如何获取每个值的完整“地址”?

2 个答案:

答案 0 :(得分:1)

假设您正在进行深度优先遍历(又名顺序),则在层次结构下降时,向下传递父节点的 path 。在捕获叶子名称的位置,在其前面加上父节点的路径。如果该节点不是叶子,则在该节点的名称前加上父节点的路径,然后将其向下传递。

local node = path .. "." .. tostring(key) -- tostring used in case key is not a string

使用“ GLOBAL”作为初始路径。

答案 1 :(得分:1)

更有效,更轻松的方法是使用table.concat。例如,要显示所有字段:

local myprint
myprint = function(tab, prefixtab) -- Tab = tab to print, prefix = inital tab ({'GLOBAL'} in your case) or nil
    prefixtab = prefixtab or {}
    local idx = #prefixtab+1
    for k,v in pairs(tab) do
        prefixtab[idx] = k
        print(table.concat(prefixtab, '.')) -- Comment to don't print for every path
        if type(v) == 'table' then
            myprint(v, prefixtab)
        --else -- To print only complete pathes
            --print(table.concat(prefixtab, '.'))
        end
    end
    prefixtab[idx] = nil
end

示例(基于您的表):

> myprint(GLOBAL, {'GLOBAL'})
GLOBAL.ADVANTAGES
GLOBAL.ADVANTAGES.CLASS
GLOBAL.ADVANTAGES.CLASS.WARRIOR
GLOBAL.ADVANTAGES.CLASS.WARRIOR.CRIT_DAMAGE
GLOBAL.ADVANTAGES.CLASS.WARRIOR.ATTACK
GLOBAL.ADVANTAGES.CLASS.WARRIOR.CRIT_CHANCE
GLOBAL.ADVANTAGES.CLASS.WARRIOR.DEFEND
GLOBAL.ADVANTAGES.CLASS.PRIEST
GLOBAL.ADVANTAGES.CLASS.PRIEST.CRIT_DAMAGE
GLOBAL.ADVANTAGES.CLASS.PRIEST.ATTACK
GLOBAL.ADVANTAGES.CLASS.PRIEST.CRIT_CHANCE
GLOBAL.ADVANTAGES.CLASS.PRIEST.DEFEND
GLOBAL.ADVANTAGES.CLASS.PALADIN
GLOBAL.ADVANTAGES.CLASS.PALADIN.CRIT_DAMAGE
GLOBAL.ADVANTAGES.CLASS.PALADIN.ATTACK
GLOBAL.ADVANTAGES.CLASS.PALADIN.CRIT_CHANCE
GLOBAL.ADVANTAGES.CLASS.PALADIN.DEFEND

或仅完全路径版本:

> myprint(GLOBAL, {'GLOBAL'})
GLOBAL.ADVANTAGES.CLASS.PRIEST.CRIT_CHANCE
GLOBAL.ADVANTAGES.CLASS.PRIEST.ATTACK
GLOBAL.ADVANTAGES.CLASS.PRIEST.CRIT_DAMAGE
GLOBAL.ADVANTAGES.CLASS.PRIEST.DEFEND
GLOBAL.ADVANTAGES.CLASS.WARRIOR.CRIT_CHANCE
GLOBAL.ADVANTAGES.CLASS.WARRIOR.ATTACK
GLOBAL.ADVANTAGES.CLASS.WARRIOR.CRIT_DAMAGE
GLOBAL.ADVANTAGES.CLASS.WARRIOR.DEFEND
GLOBAL.ADVANTAGES.CLASS.PALADIN.CRIT_CHANCE
GLOBAL.ADVANTAGES.CLASS.PALADIN.ATTACK
GLOBAL.ADVANTAGES.CLASS.PALADIN.CRIT_DAMAGE
GLOBAL.ADVANTAGES.CLASS.PALADIN.DEFEND