The\smatches any whitespace characters in the string, like tab, space, newline, line feed, form feed, etc. Using match() method on string with regex Thematch()is used to match a string against a regular expression. If a match is found it returns the array with the matched result. And...
Alternatively, it can also be used as typeof() method in JavaScript.Syntax:typeof(variable); Example 1:str = "This is my place."; if (typeof str == String) { console.log('The variable is a String.'); } else { console.log('The variable is not a String.'); } ...
To check if a variable is an array in Javascript is essential to handle data appropriately. We will discuss three different approaches to check if a variable is an array or not. We are having an array and a string, and our task is to check if a variable is an array in JavaScript. ...
TheString.match()method matches a string against a regular expression. The method returns an array containing the matches (if any) ornullif no matches are found. We used theendsWithNumberfunction to verify that there will be a match in advance before calling thematch()method. ...
put-array-or-string-here.indexOf() Code //code to check if a value exists in an array using javascript indexOf var fruits_arr = ['Apple', 'Mango', 'Grapes', 'Orange', 'Fig', 'Cherry']; var string = "Orange"; // Find in Array fruits_arr.indexOf('Tomato'); fruits_arr.index...
conststring='not array';string.length;// 9 Even an object can havelengthproperty if we set it 😱 constobject={length:2};constarray=['🍝','🍜','🍲'];typeofarray==='object'&&Boolean(array.length);// truetypeofobject==='object'&&Boolean(object.length);// true <-- 😱 ...
Below is an example to find if the string is a palindrome using JavaScript String and Array Methods ? Open Compiler // Function to check for Palindrome function isPalindrome(str) { const lowerCaseStr = str.toLowerCase(); const modifiedStr = lowerCaseStr.replace(/[\W_]/g, ''); const re...
Topic: JavaScript / jQueryPrev|NextAnswer: Use the indexOf() MethodYou can use the indexOf() method to check whether a given value or element exists in an array or not. The indexOf() method returns the index of the element inside the array if it is found, and returns -1 if ...
log(allAreEqual(arr2)); // 👉️ true We first make sure the array contains more than 1 element. If it does, we pass the array to the Set constructor. In all other cases, we return false. You can also use a for...of loop to check if all elements in an array are equal....
Vue.JS check if Array,Object or String is empty: In Vue.js, To check if an array is empty in Vue.js, you can use the Array.length property, which returns the number of elements in the array To check if the string is empty in Vue.js, you can use the