To check if a JavaScript array is empty or not, you can make either of the following checks (depending on your use case): const empty = !Array.isArray(array) || !array.length; const notEmpty = Array.isArray(array
If you try to access an element of an array that hasn’t been initialized, it returns undefined. Here’s an example of the code. let numbers = [1, 2]; console.log(numbers[3]); // undefined Read More: Common JavaScript Issues and its Solutions Methods to check if a Variable is Un...
php// array declaration$array1=array("hello","world");$array2=array();//checking whether arrays are empty or notif(empty($array1)){echo"array1 is empty";}else{echo"array1 is not empty";}if(empty($array2)){echo"array2 is empty";}else{echo"array2 is not empty";}?> Output arra...
While writing a program or any script or any piece of frontend code in Javascript, if you want to check if an array is empty or not, you can use the length property of arrays in Javascript. The length property of the array returns the count of the number of elements stored in the ...
How to Check if Object is Empty in JavaScriptHere's a Code Recipe to check if an object is empty or not. For newer browsers, you can use plain vanilla JS and use the new "Object.keys" 🍦 But for older browser support, you can install the Lodash library and use their "isEmpty" ...
With JavaScript, it can be difficult to check whether an object is empty. With Arrays, you can easily check withmyArray.length, but on the other hand, objects do not work that way. The best way to check if an object is empty is by using a utility function like the one below. ...
How to Check String is Empty or Not in Javascript? In this example, we use JavaScript to check string is empty or null using !str || str.trim().length === 0;. This expression evaluates to true if the string is empty or null, and false otherwise. You can check and edit this code...
log("The percent is="+value1); } else { console.log("This is not percentage"); } Output The percent is=97% This is not percentage Conclusion In this article, we have created a simple program that is used to efficiently check if the value is a percentage or not in JavaScript. In ...
Write a JavaScript function to check whether an 'input' is an array or not. Test Data: console.log(is_array('w3resource')); console.log(is_array([1, 2, 4, 0])); false true Sample Solution: JavaScript Code: // Function to check if the input is an arrayvaris_array=function(input...
a static method that returns an Array when we pass an object to it, which contains the property names (keys) belonging to that object. We can check whether thelengthof this array is0or higher - denoting whether any keys are present or not. If no keys are present, the object is empty...