A function is a piece of code that is called by name. It can be passed data to operate on (i.e. the parameters) and can optionally return data (the return value). All …
What’s the difference between a method and a function? Learn MoreQuery: PHPLint, JSLint, and I recently came across “you can lint your JS code on the fly” while reading something about some IDE. So, what is “linting”? What is “Linting”? Linting is the process of running …
What is “Linting” in programming? Learn MoreQuery: What is the difference between using Function.prototype.apply() and Function.prototype.call() to invoke a function? func.apply(); vs func.call(); Are there performance differences between the two aforementioned methods? When is it best to use call over apply and vice versa? Difference between …
What is the difference between call and apply in JavaScript? Learn MoreMetaclasses in Python explained: Classes as objects Before understanding metaclasses, you need to master classes in Python. And Python has a very peculiar idea of what classes are, borrowed from …
What are metaclasses in Python? [Answered] Learn MoreQuery explained: The singleton pattern is a fully paid-up member of the GoF‘s patterns book, but it lately seems rather orphaned by the developer world. I still use quite a lot of singletons, especially …
What are the drawbacks or disadvantages of the singleton pattern? [Answered] Learn MoreQuery explained: What is the difference between a parameter passed by reference a parameter passed by value? Could you give me some examples, please? What’s the difference between passing by …
What’s the difference between call by reference and call by value? [Answered] Learn MoreQuery explanation: CMAScript 6 introduced the let statement. I’ve heard that it’s described as a local variable, but I’m still not quite sure how it behaves differently than the var keyword. What are the differences?. When should let be …
What’s the difference between using “let” and “var” in JavaScript? [Answered] Learn MoreSample query explanation: I’m trying to put together a comprehensive regex to validate phone numbers. Ideally it would handle international formats, but it must handle US formats, including the following: …
How to validate phone numbers using regex? [Answered] Learn MoreQuery explained: Here is a piece of C++ code that shows some very peculiar behavior. For some strange reason, sorting the data (before the timed region) miraculously makes the loop almost …
Why is it faster to process a sorted array than processing an unsorted array? [Answered] Learn MoreSample problem: Apparently, I have completely misunderstood its semantics. I thought of something like this: A client downloads javascript code MyCode.js from http://siteA – the origin. The response header of MyCode.js contains Access-Control-Allow-Origin: http://siteB, which …
How does Access-Control-Allow-Origin header work? [Answered] Learn More1. Don’t design your page, and then change it with DOM manipulations In jQuery, you design a page, and then you make it dynamic. This is because jQuery was designed for augmentation …
How to switch to AngularJS if I have a jQuery background? [Answer] Learn MoreProblem: I have the following code. And the code is just running with no runtime exceptions! The output was 58 How can it be? Isn’t the memory of a local variable …
Can a local variable’s memory be accessed outside its scope? | C++ [Answered] Learn MoreProblem: 585262 I was writing code that does something that looks like: Someone told me this is called the “deferred antipattern” or the “Promise constructor antipattern” respectively, what’s bad about this …
What is the explicit promise construction antipattern and how do I avoid it? [Answered] Learn MoreThis article shared the top best answers to the problem mentioned above. Why is “using namespace std;” considered bad practice? Answer #1: This is not related to performance at all. …
Why is “using namespace std;” considered bad practice? [Top Answers] Learn More
In this article, you’ll learn how to get numbers from a string in C with examples. There are many ways to do that, but my favorite a recommended method is …
How to extract numbers from a string in C? Learn MoreThe following C++ program converts quarters, dimes and nickels to cents. It is assumed that you know the basic syntax of a C++ program. In this article, you’ll learn: To …
C++ program to convert quarter, dime and nickel to cent Learn MoreThis C program takes the position as input from the user and deletes the element of array at that position.In this program, the original array and its size is also …
C program to delete an element from an array Learn More