Programming language for self-modifying code?

Question

• I am recently thinking about writing self-modifying programs, I think it may be powerful and fun. So I am currently looking for a language that allows

Answer 1

In Lua, you can "hook" existing code, which allows you to attach arbitrary code to function calls. It goes something like this:

local oldMyFunction = myFunction
myFunction = function(arg)
    if arg.blah then return oldMyFunction(arg) end
    else
        --do whatever
    end
end

You can also simply plow over functions, which sort of gives you self modifying code.