new operator and function constructor in Javascript Constructor function The constructor function can be created with a new keyword When a new operator is used to create a function the following things happen How it works The new empty object is created The function is called and this keyword is…

IIFE Immediately Invoked Function Expression Introduction Is a JavaScript function that runs as soon as it is defined It is also called a Self - Executing Anonymous Function The first is the anonymous function with lexical scope enclosed within the Grouping Operator() This prevents accessing variables within the IIFE idiom…

Recursive Functions in Javascript A function which can call itself function factorial(n) { if ((n === 0) || (n === 1)) return 1; else return (n * factorial(n - 1)); } console.log(factorial(4)); //24 Best practices Identify the base case Identify the recursive case Get closer and return the calculated value…

Pure Functions in Javascript Always returns the same output when given the same input, No side effect function square(number) { return number * number; } console.log(square(2)); // 4  

High Order Functions in Javascript A function that returns a function or receives a function is called a Higher-Order Function const sayHello = function() { return function() { console.log("Hello!"); } } const myFunc = sayHello(); myFunc();