Lua，表:合并重复键的值并删除重复项 [英] Lua, Tables: merge values of duplicate keys and remove duplicates

问题描述

最近我开始对lua摆弄很多，但我一生都无法解决.

I've started fiddling a lot with lua recently, but I can't for my life figure this out.

假设我有一个看起来像这样的字符串:

Let's say I have a string that looks like this:

s ="a = x a = y b = z a = x"

s = "a=x a=y b=z a=x"

我想删除所有重复项并将重复键的值合并到一个表中，以便得到:

I want to remove all duplicates and merge the values of duplicate keys into a table, so that I get:

t = {
a = {x,y},
b = {z},
}

我考虑这件事已经太久了.感谢您的帮助！

I've been pondering about this for way too long. Any help is appreciated!

推荐答案

尝试一下:

s="a=x a=y b=z a=x"

s=s.." "
t={}
for k,v in s:gmatch("(.-)=(.-)%s+") do
        if t[k]==nil then t[k]={} end
        t[k][v]=true
end

for k,v in pairs(t) do
        for z in pairs(v) do print(k,z) end
end

这篇关于Lua，表:合并重复键的值并删除重复项的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！