1.

Explain Higher Order Functions in javascript.

Answer»

Functions that operate on other functions, either by taking them as arguments or by returning them, are called higher-order functions.

Higher-order functions are a result of functions being first-class citizens in javascript.

Examples of higher-order functions:

function higherOrder(fn) {
fn();
}

higherOrder(function() { console.log("Hello world") });   function higherOrder2() {
return function() {
return "Do something";
}
}
var x = higherOrder2();
x() // Returns "Do something"


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