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Apr 9, 2015 · I've been looking and haven't found a simple question and answer on stack overflow looking into finding the average of an array. This is the array that I have const grades = [80, 77, 88, 95, 68]; I
js is a language that accepts many shortcuts and different ways to write it.. while there are many slow readable functions in here i just like to show how it could be done in a more performant way, also saving some bytes... bitwise and shorthand is really underestimated here and the web is full of buggy and slow code.
Feb 19, 2009 · the simplest answer is, assuming the need is to add 1 day to the current date: var currentDate = new Date(); var numberOfDayToAdd = 1; currentDate.setDate(currentDate.getDate() + numberOfDayToAdd ); To explain to you, line by line, what this code does: Create the current date variable named currentDate.
Dec 14, 2023 · do the hash using native means. Text (simplified example, best for small inputs) 2024 update. import { hash } from 'node:crypto'; const result = hash('md5', contentToHash, 'hex'); This is prior to 2024 (NodeJs 21), the above syntax is shorter and faster up to x2, so if possible go that way.
Aug 5, 2009 · Ways to clear an existing array A: Method 1. (this was my original answer to the question) A = []; This code will set the variable A to a new empty array. This is perfect if you don't have references to the original array A anywhere else because this actually creates a brand new (empty) array. You should be careful with this method because if ...
But in Node.js, it's a built-in function with a special purpose: to load modules. Modules are a way to split an application into separate files instead of having all of your application in one file. This concept is also present in other languages with minor differences in syntax and behavior, like C's include , Python's import , and so on.
With Node.js. In Node.js you can encode normal text to base64 with Buffer.fromString /* Buffer() requires a number, array or string as the first parameter, and an optional encoding type as the second parameter. The default is "utf8".
Apr 16, 2010 · NaN in JavaScript stands for "Not A Number", although its type is actually number. typeof(NaN) // "number". To check if a variable is of value NaN, we cannot simply use function isNaN (), because isNaN () has the following issue, see below: var myVar = "A"; isNaN(myVar) // true, although "A" is not really of value NaN.
Feb 27, 2009 · 1. Most answers to this problem ask us to capture (trace) the stack in the catch block. But this is too late. Here is minimal code to illustrate the good way to capture the stack where the throw actually occurs, and the usual but bad way to capture the stack after the exception has unwound the stack.
Nov 2, 2009 · To quote Valid JavaScript variable names, my write-up summarizing the relevant spec sections: An identifier must start with $, _, or any character in the Unicode categories “Uppercase letter (Lu)”, “Lowercase letter (Ll)”, “Titlecase letter (Lt)”, “Modifier letter (Lm)”, “Other letter (Lo)”, or “Letter number (Nl)”.
