There are a few Lua-based webservers around: Xavante seems to be the most popular. Haserl is nice and small. Nanoki is not strictly a webserver, but a nice small pure Lua wiki engine worth studying. As for the Lua wikies, there is also Sputnik, which is fully featured and very flexible, but is a bit … Read more
It works, you just have to assign the actual result/return value. Use one of the following variations: str = str:gsub(“%s+”, “”) str = string.gsub(str, “%s+”, “”) I use %s+ as there’s no point in replacing an empty match (i.e. there’s no space). This just doesn’t make any sense, so I look for at least one … Read more
Norman wrote concerning luaproc: “it’s not obvious to me how to use the scalar message-passing model to get results ultimately into a parent thread” I had the same problem with a use case I was dealing with. I liked lua proc due to its simple and light implementation, but my use case had C code … Read more
I strongly agree with @jpjacobs’s points. Lua is an excellent choice for embedding, unless there’s something very specific about lisp that you need (for instance, if your data maps particularly well to cons-cells). I’ve used lisp for many many years, BTW, and I quite like lisp syntax, but these days I’d generally pick Lua. While … Read more
If compiling software yourself, you should install not only the runtime (lua5.1) but also the development packages (liblua5.1-0-dev). That package contains the lua5.1.pc file. It’s also in the lua source distribution.
There is no quit keyword. Try control-D in Unix, control-Z in Windows or os.exit() if you must.
Coroutines aren’t threads. Coroutines are like threads that are never actively scheduled. So yes you are kinda correct that you would have to write you own scheduler to have both coroutines run simultaneously. However you are missing the bigger picture when it comes to coroutines. Check out wikipedia’s list of coroutine uses. Here is one … Read more
[I was going to post this as a comment on John Cromartie’s post, but didn’t realize you couldn’t use formatting in a comment.] I agree. Dropping it to a shell with os.execute() will definitely work but in general making shell calls is expensive. Wrapping some C code will be much quicker at run-time. In C/C++ … Read more
I hate having to install libraries (especially those that want me to use installer packages to install them). If you’re looking for a clean solution for a directory listing on an absolute path in Lua, look no further. Building on the answer that sylvanaar provided, I created a function that returns an array of all … Read more
From Lua using debug.getinfo, e.g., local line = debug.getinfo(1).currentline From C using lua_getinfo (This will return the linenumber inside lua code) lua_Debug ar; lua_getstack(L, 1, &ar); lua_getinfo(L, “nSl”, &ar); int line = ar.currentline http://www.lua.org/manual/5.1/manual.html#lua_getinfo http://www.lua.org/manual/5.1/manual.html#pdf-debug.getinfo