WoW:API getn
Lua/Libshortcut From TableLibraryTutorial of lua-users.org.
table.getn(table)
This is used to determine the size of a table. The size of a table is discussed at the top of this page.
> = table.getn({1,2,3}) -- Lua will count the elements if no size is specified
3
> = table.getn({1,2,3; n=10}) -- note, n overrides counting the elements
10
> t = {1,2,3}
> table.setn(t, 10) -- set our own size with setn()
> = table.getn(t)
10
> = table.getn({1,2,3,nil,5,6}) -- sequence ends at element 3 due to nil value at 4
3