Extending standard library modules

Question

Is it possible to extend (or even override) standard library modules. I'd like to be able to do something like

-- eggs.lua
table.spam = function(tab)
    return tab[1]
end

and then

-- ham.lua
require('eggs')
table.spam({2,7,1,3})

Answer 1

Yes, it's possible, although the recommendation would be not to modify the standard library namespace, but use tablex instead as some libraries do.