Lua : remove duplicate elements

Question

我在 lua 有一张 table

测试 = {1,2,4,2,3,4,2,3,4,"A", "B", "A"}

我想删除表中的所有重复元素。
输出应该是

测试 = {1,2,4,3,"A","B"}

编辑:

我的尝试:

> 项目 = {1,2,4,2,3,4,2,3,4,"A", "B", "A"}
> 标志 = {}
> for i=1,table.getn(items) 做
如果不是 flags[items[i]] 那么
io.write(' ' .. items[i])
标志[items[i]] = true
结尾
>> 结束
1 2 4 3 A B>

它现在工作正常。
感谢您的回答和评论。

Answer 1

类似于@Dimitry 给出的示例，但只有一个循环

local test = {1,2,4,2,3,4,2,3,4,"A", "B", "A"}
local hash = {}
local res = {}

for _,v in ipairs(test) do
   if (not hash[v]) then
       res[#res+1] = v -- you could print here instead of saving to result table if you wanted
       hash[v] = true
   end

end