last index array javascript

var colors = ["red","blue","green"];
var green = colors[colors.length - 1]; //get last item in the array

// Find the last item in an array.

arrayName[arrayName.length - 1]

var myArray = [1, 2, 3, 4];
myArray[myArray.length - 1];

const str = "Users/Edit/12345";
let idx = str.lastIndexOf("/"); // returns 10
idx = str.lastIndexOf("x"); // returns -1

idx = str.lastIndexOf("Edit") // returns 6
idx = str.lastIndexOf("edit") // returns -1 -- case sensitive

// add "from" parameter
// the search happens backwards, starting at the provided from parameter
idx = str.lastIndexOf("s"); // returns 4
idx = str.lastIndexOf("s", 3); // returns 1

array.lastIndexOf(searchElement[, fromIndex]);

const array = ['a', 's', 'd', 'f'];
const last = array.pop(); 
console.log(last); // Returns 'f'
console.log(array); // Returns ['a', 's', 'd']

// Find the last item in an array.
arrayName[arrayName.length - 1]

var fruits = ["Banana", "Orange", "Apple", "Mango"];

var a = fruits.lastIndexOf("Apple");