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Building a notification system [closed]
...once the user has seen or acted on the notification? Do you just remove it from the database or just use dates to see if the user has logged in since the notification was created?
– Jeffery Mills
Feb 17 '14 at 3:16
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How to read from standard input in the console?
I would like to read standard input from the command line, but my attempts have ended with the program exiting before I'm prompted for input. I'm looking for the equivalent of Console.ReadLine() in C#.
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How to convert a DOM node list to an array in Javascript?
... you can now can use in modern environments the spread syntax or the Array.from method:
const array = [ ...nodeList ] // or Array.from(nodeList)
But thinking about it, I guess the most common use case to convert a NodeList to an Array is to iterate over it, and now the NodeList.prototype object h...
What is the purpose of the word 'self'?
...elf word in Python? I understand it refers to the specific object created from that class, but I can't see why it explicitly needs to be added to every function as a parameter. To illustrate, in Ruby I can do this:
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Rolling median algorithm in C
...plement a rolling median filter (analogous to a rolling mean filter) in C. From my search of the literature, there appear to be two reasonably efficient ways to do it. The first is to sort the initial window of values, then perform a binary search to insert the new value and remove the existing one ...
How to clean node_modules folder of packages that are not in package.json?
...ile I see that I don't need some specific module and remove its dependency from package.json . Then I remove some other modules from package.json because they are not needed anymore and others are replaced with alternatives.
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How do I manage MongoDB connections in a Node.js web application?
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So, to answer your question directly, reuse the db object that results from MongoClient.connect(). This gives you pooling, and will provide a noticeable speed increase as compared with opening/closing connections on each db action.
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How is mime type of an uploaded file determined by browser?
...termine the MIME type and does so in a certain order. The snippet below is from file src/net/base/mime_util.cc, method MimeUtil::GetMimeTypeFromExtensionHelper.
// We implement the same algorithm as Mozilla for mapping a file extension to
// a mime type. That is, we first check a hard-coded list (t...
What's the best way to send a signal to all members of a process group?
...ocess group. (This is often the case if the tree is the result of forking from a server start or a shell command line.) You can discover process groups using GNU ps as follows:
ps x -o "%p %r %y %x %c "
If it is a process group you want to kill, just use the kill(1) command but instead of giv...
How can I read input from the console using the Scanner class in Java?
How could I read input from the console using the Scanner class? Something like this:
15 Answers
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