Arrow functions in Javascript (ES6)

arrow_functions_es6.js

// Snippet for arrow functions (ES6)

// Example of a normal arrow function
let substract = (a, b) => {
    return a - b;
}

// Example of a one-line arrow function
let add = (a, b) => a + b;

// Another useful example of arrow functions
let nums = [2, 3, 4, 5];
let doubled = nums.map((n) => 2*n);

// Be aware that arrow functions have parent lexical scope, that is, "this"
// keyword refers to the parent of the current Object, not the Object itself
let person = {
    name: "Ryan",
    hobbies: ["Robots", "Reading"],
    showHobbies() {
        this.hobbies.forEach( (hobby) => console.log(`${this.name} likes ${hobby}`) );
    }
}

person.showHobbies();