Lua:删除重复的元素 [英] Lua : remove duplicate elements

问题描述

我在lua中有一张桌子

i am having a table in lua

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

我想删除表中所有重复的元素.
输出应为

I want to remove all duplicate elements in table.
Output should be

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

我的尝试:

My try :

> items = {1,2,4,2,3,4,2,3,4,"A", "B", "A"}
> flags = {}
> for i=1,table.getn(items)  do
if not flags[items[i]] then
      io.write(' ' .. items[i])
      flags[items[i]] = true
   end
>> end
 1 2 4 3 A B>

现在工作正常. 感谢您的回答和评论.

It is working fine now. Thanks for answers and comments.

推荐答案

类似于@Dimitry给出的示例，但只有一个循环

Similar to example given by @Dimitry but only one loop

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

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