I need to merge objects today, and this question (and answers) helped me a lot. I tried some of the answers, but none of them fit my needs, so I combined some of the answers, added …

Feb 11, 2013 · Almost everything within JS is an object, and for that reason elements further down the pipeline of inheritance can potentially technically use those available to those up the …

87 If you are working in AngularJS, the angular.equals function will determine if two objects are equal. In Ember.js use isEqual. angular.equals - See the docs or source for more on this …

Aug 8, 2008 · I have a JavaScript object. Is there a built-in or accepted best practice way to get the length of this object? const myObject = new Object (); myObject ["firstname"] = "Gareth";

Feb 28, 2013 · This will be O (n) where n is the number of objects in array and m is the number of unique values. There is no faster way than O (n) because you must inspect each value at least …

The OP requests an answer which is ES5/ES6 compatible, and the traditional for loop applies :) The problem with using array functions in this scenario, is that they don't mutate objects, but in …

Aug 12, 2012 · A nested data structure is an array or object which refers to other arrays or objects, i.e. its values are arrays or objects. Such structures can be accessed by consecutively …

The above function accepts any number of objects, merging all of their properties into a new object with properties from later objects overwriting those from previous objects.

What is the most efficient way to groupby objects in an array? For example, given this array of objects:

Here is my object literal: var obj = {key1: value1, key2: value2}; How can I add field key3 with value3 to the object?