Javascript Practice 72: JS Hero - The arguments object

 

Question: 

Write a function max that calculates the maximum of an arbitrary number of numbers.

Example: max(1, 2) should return 2 and max(2, 3, 1) should return 3.

Answer: 

function max () {

let acb = [...arguments]; 

acb.sort((a, b) => b - a);

return acb[0];

}

> we declare a function max

> it has no parameters

> we declare a variable 'acb'

> we initialize it with a value using the spread operator

> spread operator converts our arguments / numbers which are strings to arrays

> we then use the sort method, on our array 'acb' created by the spread operator, 

> we use the sort method to arrange the numbers in our array in descending order

> like this: acb.sort((a,b) => b - a )

> if we wanted to arrange the numbers in our array in ascending order we can do the opposite

> like this: acb.sort((a,b) => a - b )

> so basically we convert the string in to array and then sort the array in descending order

> now in order to get the maximum number we simply return the first element of our array

> like this: return acb[0]

> we shall get our maximum number