As logically concluded by the linq example None is the same as !Any, so you could define your own extension method as follows: let none = (arr, callback) => !arr.some(callback) And then call like this: let arr = [“a”,”b”,”c”] let noBs = none(arr, el => el === “b”) Or if you want to extend Array.proto, … Read more
These are tagged template literals. The part before the backpacks is a reference to a function that will be called to process the string. The function is passed the variables (the ${} parts) as arguments as well as the pieces of the string that surround the variables broken into an array. The return value of … Read more
You shouldn’t use the function keyword in a Typescript class definition. Try this instead: class Test { add(x: number, y: number): number { return x + y; } }
ES6 will almost certainly not cover syntax for defining class variables. Only methods and getters/setters can be defined using the class syntax. This means you’ll still have to go the MyClass.classVariable = 42; route for class variables. If you just want to initialize a class with some defaults, there is a rich new syntax set … Read more
The only case where $ does not produce the literal $ is before a {, otherwise you do not need to escape it. var response = `You have $${money}` does work therefore. In case you need to escape anything, the backslash \ is the escape character in template strings as well, so (while unnecessary) the … Read more
Component methods are not attached to the window object. MyApp.handleGoogleClientLoad is not going to be aliased to window.handleGoogleClientLoad which is what the google API script is likely trying to invoke. If you want the Google API to call a method on your component you’re going to have some trouble as there’s no guarantee that your … Read more
Listen, I know there are more than a handful of cracks at this solution here. Some may work for you, but for me, none solved me but the one below. 2021 UPDATE: BORING BACKSTORY ALERT We’re using Node v14.16.0 and our package.json has “type”: “module” set. So, our code is ES6+ and commonjs imports are … Read more
From the spec: Any reference to arguments, super, this, or new.target within an ArrowFunction must resolve to a binding in a lexically enclosing environment. Therefore, the correct answer would be [1,2,3]. Firefox has fixed the problem in version 43 (bug 889158).
You are correct. They are pretty much close to any other object oriented programming languages like C++ and Java Everything is documented. That is a static method you are looking at and the get is a getter for the property or the Object you want to get. If you look at explore static static methods. … Read more
Use this import blah from ‘./blaha’; export default class myclass{ constructor(con) { this.config = con; } async meth1(paramA) { //do_stuff… } meth2(paramB) { this.meth1() } }