In JavaScript, there is no built-in function to check if every character in a given string is in uppercase format or not. So, we have to implement our function. Here, we will create a function calledisUpperCase(), an anonymous arrow function, to tell us whether all the characters in a...
In this post, we will see how to check whether the first character in a string is a space or not using Javascript. To check if a string starts with a space or not we can use: RegExptestmethod, Stringmatchmethod with regExp, or ...
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.
The other pointer at the end of the string ? let right = cleanedStr.length - 1; Move the pointers inward, checking for character equality ? while (left < right) { left++; right--; } Example Below is an example to find if the string is a palindrome using the Two-Pointer Technique ...
Pre-ES6, the common way to check if a string contains a substring was to use indexOf, which is a string method that return -1 if the string does not contain the substring. If the substring is found, it returns the index of the character that starts the string....
The code for this article is available onGitHub JavaScript indexes are zero-based in JavaScript, so the first character in a string has an index of0and the last character has an index ofstr.length - 1. If comparing the uppercase variant of the first letter to the letter itself returnstrue...
Different methods to check if string contains spaces in JavaScript Method-1: UseindexOfmethod Not to be confused with the arrayindexOfmethod, theString.prototype.indexOf()takes a string argument and searches for it within the string it’s called upon and returns the index of the first occurren...
onIgnoreAll(word)The user clieck 'Ignore All' for a word in either SpellCheckInWindow or SpellAsYouType. Word is passed as a string $Spelling.PopUpStyle="modeless"; o = $Spelling.SpellCheckInWindow('all'); o.onIgnoreAll = function(word){} ...
Therefore, if the return value is not -1, we can safely assume that the string does contain the substring we are looking for. Note that you can also use this method to search for a single character. Why not use the includes() method?
We will print to the webpage if it contains the character in the string otherwise not. Here's a PHP script to implement this functionality. We will be using strpos() function, which expects two parameter, mpageTU is string to check for any other is the character against which string has...