Ranjith srtHigher-order Functions:
Functions that take other functions as arguments or return them as results.
function startEngine() {
return 'is started!';
}
// Higher-order function
function drive(driverName, engine) {
const message = engine(); // Callback function
console. Iog(' ${message} by ${driverName}' )
}
drive( ' Alex ' , startEngine);
output:
Engine is started! by Alex
Pure Functions: Functions that, given the same input,will always return the same output and have no side effects.
Higher-order Functions:
// Pure function
functionadd(a, b) {
return a + b;
console.log(add(2,3)); //5
console.log(add(2,3)); //5
console.log(add(2,3)); //5
Impure function
let counter =0;
function increment(value) {
counter += value;
return counter;
}
console.log(increment(2)); 2
console.log(increment(2)); 4
console.log(increment(2)); 6
