How do sizeof(arr) / sizeof(arr[0]) work?

If you have an array then sizeof(array) returns the number of bytes the array occupies. Since each element can take more than 1 byte of space, you have to divide the result with the size of one element (sizeof(array[0])). This gives you number of elements in the array. Example: LIVE EXAMPLE Note that if you … Read more

java.net.ConnectException: Connection refused

This exception means that there is no service listening on the IP/port you are trying to connect to: You are trying to connect to the wrong IP/Host or port. You have not started your server. Your server is not listening for connections. On Windows servers, the listen backlog queue is full.

React.js inline style best practices [closed]

There aren’t a lot of “Best Practices” yet. Those of us that are using inline-styles, for React components, are still very much experimenting. There are a number of approaches that vary wildly: React inline-style lib comparison chart All or nothing? What we refer to as “style” actually includes quite a few concepts: Layout — how … Read more

How does Java’s PriorityQueue differ from a min-heap?

Add() works like an insertWithPriority. You can define priority for the type that you want using the constructor: look under https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/PriorityQueue.html The order the Comparator gives will represent the priority in the queue.

How does Java’s PriorityQueue differ from a min-heap?

Add() works like an insertWithPriority. You can define priority for the type that you want using the constructor: look under https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/PriorityQueue.html The order the Comparator gives will represent the priority in the queue.

How do I remove a submodule?

Since git1.8.3 (April 22d, 2013): There was no Porcelain way to say “I no longer am interested in this submodule”, once you express your interest in a submodule with “git submodule init“.“git submodule deinit” is the way to do so. The deletion process also uses git rm (since git1.8.5 October 2013).

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