I have an object, x. I'd like to copy it as object y, such that changes to y do not modify x. I realized that copying objects derived from built-in JavaScript objects will result in extra, unwanted properties. This isn't a problem, since I&...
If I have a JavaScript object, say  var myObject = new Object(); myObject["firstname"] = "Gareth"; myObject["lastname"] = "Simpson"; myObject["age"] = 21;   is there a built-in or accepted best practice way t...
What is the most concise and efficient way to find out if a JavaScript array contains a value?  This is the only way I know to do it:  function contains(a, obj) {     for (var i = 0; i < a.length; i++) {         if (a[i] === obj) {             r...
I have built a large application using JavaScript prototype and inheritance. But I am having a hard time organizing my code. For example I have a class carousel which has many functions like this:  Carousel.prototype.next = function () {...} Carous...
I want to create object from list of array. I have an array which is dynamic which suppose to be look like this:  var dynamicArray = ["2007", "2008", "2009", "2010"];  and with some javascript es6 I want to make an o...
Can a reserved word be used as an object's property name?  This issue was raised indirectly in a previous Stack Overflow question: Browser support for using a reserved word as a property name in JavaScript. The answer seemed general consensus b...
I want to encode a Javascript object into a JSON string and I am having considerable difficulties.  The Object looks something like this  new_tweets[k]['tweet_id'] = 98745521; new_tweets[k]['user_id'] = 54875;        new_tweets[k][&...
So we had a case where we would have an object, where key is id (int) and the value is the string. But we noticed that most of the times, we look up id based on the string, so we decided to reverse it and make a string the key and the value is the...
How can I get the value of an object with an unknown single key?  Example:   var obj = {dbm: -45}   I want to get the -45 value without knowing its key.  I know that I can loop over the object keys (which is always one).  for (var key in objects) {...

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