JSFiddle - React, Tailwind, and code Playground

by somya_kashyap3

JavaScript

/*var arr = [1,2,3,4,5,6];
var arr1 = arr.map(x => x*2);
console.log(arr1);

var elements = [
  'Hydrogen',
  'Helium',
  'Lithium',
  'Beryllium'
];

elements.map(function(element ) { 
  return element.length; 
}); // [8, 6, 7, 9]

elements.map(element => {
  return element.length;
}); // [8, 6, 7, 9]

var a = elements.map(element => element.length); // [8, 6, 7, 9]
console.log(a);
var arr = [1,2,3,4,5,6];
var arr1 = arr.map(function(x) {
	return x*2 ;
});

console.log(arr1);
arr.forEach(function(x){
	x = x*2;
});
console.log(arr);