If you could only name one thing then it would be that Mongrel2 is build around ZeroMQ which means that scaling your web server has never been easier. If a request comes in, Mongrel2 receives it (nothing unusual here, same as for NginX and any other httpd). Next thing that happens is that Mongrel2 distributes … Read more
You can set the function environment that you run the untrusted code in via setfenv(). Here’s an outline: local env = {ipairs} setfenv(user_script, env) pcall(user_script) The user_script function can only access what is in its environment. So you can then explicitly add in the functions that you want the untrusted code to have access to … Read more
One simple thing you could do is abstract the test inside a function. local function isempty(s) return s == nil or s == ” end if isempty(foo) then foo = “default value” end
In the interest of actually answering the question: I’m not 100% sure what you mean by “How can I join these letters”, but from poking through the code I have a guess, so please clarify on whether it is accurate, or if I am wrong about what you wanted. Scenario 1 You haven’t successfully achieved … Read more
There are 2 options to find matching text; string.match or string.find. Both of these perform a regex search on the string to find matches. string.find() string.find(subject string, pattern string, optional start position, optional plain flag) Returns the startIndex & endIndex of the substring found. The plain flag allows for the pattern to be ignored and … Read more
To iterate over all the key-value pairs in a table you can use pairs: for k, v in pairs(arr) do print(k, v[1], v[2], v[3]) end outputs: pears 2 p green apples 0 a red oranges 1 o orange Edit: Note that Lua doesn’t guarantee any iteration order for the associative part of the table. If … Read more
for k,v in pairs(second_table) do first_table[k] = v end
I use LuaSocket to get more precision. require “socket” print(“Milliseconds: ” .. socket.gettime()*1000) This adds a dependency of course, but works fine for personal use (in benchmarking scripts for example).
The error has been documented on the Mac Developer Library(iOS docs) The concerned segment from the documentation will be: URL Loading System Error Codes These values are returned as the error code property of an NSError object with the domain “NSURLErrorDomain”. enum { NSURLErrorUnknown = -1, NSURLErrorCancelled = -999, NSURLErrorBadURL = -1000, NSURLErrorTimedOut = -1001, … Read more
torch.eq(a, b) eq() implements the == operator comparing each element in a with b (if b is a value) or each element in a with its corresponding element in b (if b is a tensor). Alternative from @deltheil: torch.all(tens_a.eq(tens_b))