I have a nested data structure containing objects and arrays. How can I extract the information, i.e. access a specific or multiple values (or keys)?  For example:  var data = {     code: 42,     items: [{         id: 1,         name: 'foo'...
Can someone suggest a way to compare the values of two dates greater than, less than, and not in the past using JavaScript? The values will be coming from text boxes....
If I have a reference to an object:  var test = {};   that will potentially (but not immediately) have nested objects, something like:  {level1: {level2: {level3: "level3"}}};   What is the best way to check for the existence of property in...
If I have a JavaScript object such as:  var list = {   "you": 100,    "me": 75,    "foo": 116,    "bar": 15 };   Is there a way to sort the properties based on value? So that I end up with  list = {   "bar":...
I'm pulling items out of the DOM with jQuery and want to set a property on an object using the id of the DOM element.   Example  const obj = {}  jQuery(itemsFromDom).each(function() {   const element = jQuery(this)   const name = element.attr(&...
If I have a JavaScript object such as:  var list = {   "you": 100,    "me": 75,    "foo": 116,    "bar": 15 };   Is there a way to sort the properties based on value? So that I end up with  list = {   "bar":...
My application creates a JavaScript object, like the following:  myObj= {1:[Array-Data], 2:[Array-Data]}   But I need this object as an array.   array[1]:[Array-Data] array[2]:[Array-Data]   So I tried to convert this object to an array by iteratin...
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Why is null considered an object in JavaScript?  Is checking   if ( object == null )       Do something   the same as   if ( !object )       Do something   ?  And also:  What is the difference between null and undefined?...

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