A table in Lua is a set of key-value mappings with unique keys. The pairs are stored in arbitrary order and therefore the table is not sorted in any way. What you can do is iterate over the table in some order. The basic pairs gives you no guarantee of the order in which the … Read more
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
Check out for srlua. It does what you need. It’s from one of the Lua authors. On this address there is also pre-compiled Windows binaries, so that would be even easier for you I think.
If the requirement is “quick and dirty” I’ve found this one useful. Because of the recursion it can print nested tables too. It doesn’t give the prettiest formatting in the output but for such a simple function it’s hard to beat for debugging. function dump(o) if type(o) == ‘table’ then local s=”{ ” for k,v … Read more
There was a problem in the NodeMCU docs with the socket:send example you seem to have based your implementation on. We discussed it and I fixed it. An improved version of your code is this: gpio.mode(3, gpio.OUTPUT) srv = net.createServer(net.TCP, 28800) print(“Server created… \n”) local pinState = 0 srv:listen(80, function(conn) conn:on(“receive”, function(sck, request) local _, … Read more
You need to run math.randomseed() once before using math.random(), like this: math.randomseed(os.time()) One possible problem is that the first number may not be so “randomized” in some platforms. So a better solution is to pop some random number before using them for real: math.randomseed(os.time()) math.random(); math.random(); math.random() Reference: Lua Math Library
Using lbc instead of lmapm would be easier because lbc is self-contained. local bc = require”bc” s=bc.pow(2,1000):tostring() z=0 for i=1,#s do z=z+s:byte(i)-(“0”):byte(1) end print(z)
Here is an implementation of a locals() function. It will return a table of locals from the calling scope: function locals() local variables = {} local idx = 1 while true do local ln, lv = debug.getlocal(2, idx) if ln ~= nil then variables[ln] = lv else break end idx = 1 + idx end … 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
LuaJ is easy to embed in Java. I did have to change a few lines of their source to get it to work how I expected (it didn’t require the IO library automatically). http://sourceforge.net/projects/luaj/