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btw, I notice that there is a new keyword, "undef", not mentions in manual, is that just a undocumented feature or the doc just not the latest?
Why is the new "undef" not used the other way round: A[2] = nil removes the entry from the table A[2] = undef puts a value in A[2] that reads 'nil' That would keep compatibility with Lua 5.3 and older -- Oliver