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Object.values(obj) – returns an array of values. Object.entries(obj) – returns an array of [key, value] pairs. But please note the distinctions (compared to map for JS Tutorial JSON objects are written in key/value pairs. Keys must be strings, and values must be a valid JSON data type (string, number, object, array, 15 Jan 2016 The Object.assign() method is used to copy the values of all enumerable own properties Adding by obj['key'] or obj.key are all solid pure JavaScript answers. . If you want to get the "length" of this array type, use: Object.keys(your_array).length More reading . See my fiddle for a working example: jsfiddle.net/7tEme/. 2 Mar 2018 Add items to a Map; Get an item from a map by key; Delete an item from map keys; Iterate over map values; Iterate over map key, value pairs. 3 Nov 2018 obj: The object whose enumerable own property [key, value] pairs are . you can find a demonstrational implementation of Object.entries in the A property is a “key: value” pair, where key is a string (also called a “property name”), get fields of the object: alert( user.name ); // John alert( user.age ); // 30. The values are written as name:value pairs (name and value separated by a colon). In the example above, this is the person object that "owns" the fullName 5 Sep 2015 JavaScript Basics: How to create a Dictionary with Key/Value pairs. 5. September In statically typed programming languages a Dictionary (Key/Value pair collection) object can be very useful at times. get value for Key. 27 Apr 2018 For example, on a social media type of application, the object keys could also create key, value pairs within the object, as our above example5 Mar 2018 If we are asked to return all the keys (Javascript objects are written as are written as “key: value” pairs) we would use the Object.keys() method. Here's an example of the array within an array that will be returned. If you enjoyed this article please share it or applaud in order to help others to find it.