isEmpty in JavaScript

The best way to check if an object is empty is by using a utility function like the one below. function isEmpty(obj) { for(var key in obj) { if(obj.hasOwnProperty(key)) return false; } return true; } So if you have an empty object, you can check whether it is empty by using the above function. var myObj = {}; // Empty Object if(isEmpty(myObj)) { // Object is empty (Would return true in this example) } else { // Object is NOT empty }

Check One Checkbox for all

function checkOneForAll(ele, main) { var checkAll = 1; $('input' + ele).each(function () { if ($(this).prop("checked") === false) { checkAll = 0; $('input' + main).prop("checked", false); return false; } else { checkAll = 1; } }); if (checkAll === 1) { $('input' + main).prop("checked", true); } }