Excellent overview of the use of \directlua to write Lua code in a LuaTeX document. From wiki.luatex.org:
http://wiki.luatex.org/index.php/Writing_Lua_in_TeX
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Excellent overview of the use of \directlua to write Lua code in a LuaTeX document. From wiki.luatex.org:
http://wiki.luatex.org/index.php/Writing_Lua_in_TeX