CODEWITHSUNDEEP
luakeylua-table
NathaanTFM
NathaanTFM

Reputation: 103

Get table key name from value

I'm trying to get table key name from a value. tostring only returns table: XXXXXXXXX

I tried some functions but nothing work.

config = {
    opt1 = "etc..."
}
players = {}

function openMenu(playerName, configTable)
    players[playerName] = Something to get Table Key...

    -- read the table and create a gui not yet made
end

And next, if I do this :

print(players[playerName])

I want to get this output :

"config"

Upvotes: 2

Views: 7552

Answers (3)

Demellion Dismal
Demellion Dismal

Reputation: 11

Easiest way, unfortunately, is to store the keys as a value to read them later. For convenience of any sort of further exports or parsing, prepend them with underscore (or anything to your liking) aka _key so you can omit them.

Upvotes: 1

Fabrizio Stellato
Fabrizio Stellato

Reputation: 1901

table.find(t, value [,start_index]) -> [key or nil]

Upvotes: -1

llogiq
llogiq

Reputation: 14541

You will need to iterate over all pairs of the table and return the key if the value is equal. Note that this will only return one binding, even if multiple keys can lead to the same value:

function find(tbl, val)
    for k, v in pairs(tbl) do
        if v == val then return k end
    end
    return nil
end

Upvotes: 4

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