有没有一种方法可以遍历lua字典以创建它? [英] Is there a way to iterate through lua dictionary in order that it's created?

问题描述

我需要按照创建它的顺序遍历Lua字典.

I need to iterate through Lua dictionary in the order that it's created.

例如:

t = {
['some'] = 'xxx',
['random'] = 'xxx',
['data'] = 'xxx',
['in'] = 'xxx',
['table'] = 'xxx',
}

成对进行普通迭代会给出随机序列顺序:

Normal iterating with pairs gives a random sequence order:

for key, val in pairs(t) do
   print(key.." : "..val)
end

random : xxx
some : xxx
data : xxx
table : xxx
in : xxx

我需要:

some : xxx
random : xxx
data : xxx
in : xxx
table : xxx

推荐答案

更改了答案，下面是旧答案供参考

Changed the answer, the old one is below for reference

-- function definition
function addNewItem(keyTable, myTable, key, value)
    table.insert(keyTable, key)
    myTable[key] = value 
end 

要将新对添加到表中:

-- you may need to reset keyTable and myTable before using them
keyTable = { }
myTable = { }

-- to add a new item
addNewItem(keyTable, myTable, "key", "value")

然后，按照添加键的顺序进行迭代:

Then, to iterate in the order the keys were added:

for _, k in ipairs(keyTable) do 
    print(k, myTable[k]) 
end

---

旧答案

您是创建表的人吗(Lua称这些表而不是字典)?如果是这样，您可以尝试执行以下操作:

---

OLD ANSWER

Are you the one creating the table (Lua calls these tables and not dictionaries)?? If so, you could try something like the following:

-- tmp is a secondary table
function addNew(A, B, key, value)
  table.insert(A, key)
  B[key] = value
end

-- then, to browse the pairs
for _,key in ipairs(table) do
  print(key, B[key])
done

这个想法是您使用两个表.一个握住您添加的键"(A)，另一个握住(B)的实际值.他们看起来像这样:

The idea is that you use two tables. One holds the 'keys' you add (A) and the other (B) the actual values. They look like this:

由于A以类似的方式配对密钥

Since A pairs the keys in a manner like

1 - key1
2 - key2
...

然后，ipairs(A)将始终按添加键的顺序返回键.然后 使用这些键访问数据

Then ipairs(A) will always return the keys in the order you added them. Then use these keys to access the data

data = B[key1]

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