jsmapfunc.js

// The map function creates a new array by calling a specific function 
// on each element in an initial array. For example, 
// if you have an array of strings in the form "MM-DD" that 
// 	represent birthdays and you want to convert each element to be in a different format, 
// you could use the map function to create a new array with new elements. 


//A simple function that changes the date format from '/' to '-'

const date1 = ["01/12", "02/09", "03/10"]

const date2= date1.map((elem) =>{
    return elem.replace("/", "-")
}) 

console.log(date2)

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// Another simple example using the map function to round an array of numbers up in JavaScript:

let arr = [1.5, 2.56, 5.1, 12.33];

// round each number up in an array
let rounded = arr.map(Math.ceil);

console.log(rounded); // => [2, 3, 6, 13]