将Key

将Key-Value和Value-Key词典存储在一个表中(Storing Key-Value and Value-Key dictionaries in a single table)

这样可以吗：例如：

table = { "Mark", "John", "Paul", "Matt", "Chris", ...}

接着

for k,v in pairs(table) do table[v] = k end

或者我应该创建两个单独的表，每对一个？ 哪一个更好的风格？

Would this be okay for example :

table = { "Mark", "John", "Paul", "Matt", "Chris", ...}

and then

for k,v in pairs(table) do table[v] = k end

Or should I create two separate tables, one for each pair? Which one is better style?

最满意答案

对于类似列表的表，其中键是整数而值是其他类似于你的表，使用单个表是一个好主意，特别是在它上面有一些元魔法（参见这个答案 ）。

话虽这么说，在这种情况下，你应该使用ipairs迭代它，而不是pairs 。

但是，对于像这样的类地图表，使用两个表更好：

my_table = { foo = "bar", spam = "eggs", chunky = "bacon", }

（因为想象如果你有这个会发生什么...）

my_table = { foo = "bar", bar = "baz", }

For a list-like table where the keys are integers and the values are something else like yours, using a single table is a good idea, especially with a bit of meta-magic on it (see this answer).

That being said, in that case, you should use ipairs to iterate it, not pairs.

For map-like table like this, however, using two tables is better:

my_table = { foo = "bar", spam = "eggs", chunky = "bacon", }

(because imagine what would happen if you had this...)

my_table = { foo = "bar", bar = "baz", }