We will compare the updated string with the reversed string using the === operator. If they are equal we will return true; otherwise, we will return false. return modifiedStr === reversedStr; Example Below is an example to find if the string is a palindrome using JavaScript String and ...
JavaScript’s allEqual() function can be used to check whether every value of an array is equal. Here’s how to use it.
JavaScript offers many ways to check if a string contains a substring. Learn the canonical way, and also find out all the options you have, using plain JavaScriptChecking if a string contains a substring is one of the most common tasks in any programming language....
In JavaScript, there are various methods available to check if a variable is undefined. Each method has its own use cases and subtle differences. 1. Using typeof Operator The typeof operator can be used to check if a variable is undefined by comparing its type with the string ‘undefined...
JavaScript Code: // Define a function 'isLowerCase' that checks if the given string 'str' contains only lowercase lettersconstisLowerCase=str=>// Check if the given string 'str' is equal to its lowercase versionstr===str.toLowerCase();// Test cases to check if the strings contain only ...
Check if Array contains only Numbers in JavaScript I wrotea bookin which I share everything I know about how to become a better, more efficient programmer. You can use the search field on myHome Pageto filter through all of my articles. ...
check.array.of.nonEmptyString(['foo','bar','']);// Returns false check.array.of.inRange([0,1,2],0,2);// Returns true check.array.of.inRange([0,1,2],0,1);// Returns false check.assert(myFunction(),'Something went wrong',CustomError);// Throws `new CustomError('Something we...
public static boolean isEqual(List<Integer> x, List<Integer> y) { if (x == null) { return y == null; } return x.equals(y); } public static void main(String[] args) { List<Integer> x = List.of(1, 2, 3, 4, 5); List<Integer> y = List.of(1, 2, 3, 4, 5); boolea...
In this tutorial, we are going to show you the ways of checking whether the JavaScript string is empty, undefined, or null. Just follow the guidelines.
A third way to check forNaNis to use the self-inequality property ofNaN. This is a trick that exploits the fact thatNaNis the only value in JavaScript that is not equal to itself. Therefore, we can check forNaNvalues by comparing a value with itself using the!==operator. If the result...