value, index) if ($index >= size($array)) -1 else if ($array[$index] == $value) $index else find-array-index($array, $value, $index + 1) let array = array(["toto", "tutu", "tata"]) index-of($array, "toto") => 0 index-of($array, "tata") => 2 ...
Reverse the array first, then check whether the value was found or not, then subtract the reversed index from the array's last index to get the correct answer. var arr = [{name:"Steve",toppedIn:"Biology"},{name:"Carol",toppedIn:"Maths"},{name:"Steve",toppedIn:"Chemistry"}]; cons...
function indexInClass(node) { var collection = document.getElementsByClassName(node.className); for (var i = 0; i < collection.length; i++) { if (collection[i] === node) return i; } return -1; } var fourth = document.getElementById('fourth'); alert("The ID is: " + indexInClass...
This post will discuss how to get the first element of an array in JavaScript... A simple and fairly efficient solution to fetch the first element of an array in JavaScript is using the `[]` operator.
In this tutorial, we are going to learn about how to get the index of the maximum value from an array using the JavaScript. Get the Index of…
JavaScript has a lot of built-in methods that can be used to manipulate arrays. Let’s find out what we can implement to access the last element of the array. Using length property Suppose, you have an array and you know the length of that array. const animals = ['giraffe', '...
First way: Using array.length property In array, we have alengthproperty by using that we can find how many elements present in an array if we subtractarr.length-1we can get the last element. Example: constusers=['sai','jim','alex','era'];constlastElement=users[arr.length-1];console...
In the JavaScript Array.prototype.forEach() method, you can get the index of the current element in the loop by using the (optional) second parameter of the callback function, for example, like so: const
How do you get the last element of an array in JavaScript? Let's find out.Are you wondering how to get last element of an array in JavaScript?Suppose you have an array, like this:const colors = ['red', 'yellow', 'green', 'blue'] In this case the array has 4 items....
1. UsinggetElementsByClassNameJavaScript ThegetElementsByClassNamemethod is used to get all the elements with the same class name in a document. The method returns array-like objects of all the elements that have the same class name. The method can be called in two ways: ...