// Higher order function : A function which takes another function as a input to itself or returns a function from itself is called...

// Callback function : A function which is passed in a higher order fucntion is called...

function x () {

console.log("Namaste");

}

function y (x) {

x()

}

y(x) // Hi

// y is higher orrder function

// x is callback function

// 🟨🚨 DRY Principle = Don't Repeat Yourself 🚨

/*

const radius = [ 3,1,2,4 ]

const calculateArea = (radius) => {

const output = []

for (let i = 0; i < radius.length; i++)

{

output.push(Math.PI * radius[ i ] * radius[ i ])

}

return output

}

console.log(calculateArea(radius));

const calculateCircumference = function (radius) {

const output = []

for (let i = 0; i < radius.length; i++)

{

output.push(2 * Math.PI * radius[ i ])

}

return output

}

console.log(calculateCircumference(radius));

const calculateDiameter = function (radius) {

const output = []

for (let i = 0; i < radius.length; i++)

{

output.push(2 * radius[ i ])

}

return output

}

console.log(calculateDiameter(radius));

*/

// 🟨Functional Programming

const radius = [ 3,1,2,4 ]

const area = function (radius) { return Math.PI * radius * radius }

const circumference = function (radius) { return 2 * Math.PI * radius }

const diameter = function (radius) { return 2 * radius }

const calculate = (arr,logic) => {

const output = []

for (let i = 0; i < arr.length; i++)

{

output.push(logic(arr[ i ]))

}

return output

}

// console.log(radius.map(area));

console.log(calculate(radius,area));

console.log(calculate(radius,circumference));

console.log(calculate(radius,diameter));