I need to know how to retrieve the key set of a table in lua. for example, if I have the following table:
tab = {}
tab[1]='a'
tab[2]='b'
tab[5]='e'
I want to be retrieve a table that looks like the following:
keyset = {1,2,5}
local keyset={}
local n=0
for k,v in pairs(tab) do
n=n+1
keyset[n]=k
end
Note that you cannot guarantee any order in keyset
. If you want the keys in sorted order, then sort keyset
with table.sort(keyset)
.