Learn how to create an Immutable.Map() through plain Javascript object construction and also via array tuples. console.clear();//Can be an objectvarmap = Immutable.Map({key: "value"}); console.log(map.get("key"));//"value"//Can be an arrayvarmap = Immutable.Map([["key", {"nam...
}// creating an object of the apple function which// will have properties of the prototype// object i.e. fruitsapple.prototype =Object.create(fruits.prototype);constapp =newapple();// Displaying the created objectconsole.log(app.name);console.log(app.season);</script> 输出: "fruit 1" "...
Creating ObjectsAn object can be created with curly brackets {} with an optional list of properties. A property is a "key: value" pair, where the key (or property name) is always a string, and value (or property value) can be any data type, like strings, numbers, Booleans or ...
The syntax for creating an object using instance of an object is: constobjectName =newObject(); Example 2: Create an Object using Instance of Object Directly // program to create JavaScript object using instance of an objectconstperson =newObject( {name:'John',age:20,hobbies: ['reading','...
Creating an object requires two steps: First, declare the object by using an object function Lastly, instantiate the newly created object by using the "new"keyword Lets take this one step at a time. We will now proceed to create an object called "userobject", which, at this stage, does...
Creating a JavaScript Object Examples Create an empty JavaScript object using{}, and add 4 properties: // Create an Object constperson = {}; // Add Properties person.firstName="John"; person.lastName="Doe"; person.age=50; person.eyeColor="blue"; ...
Creating a new Object instance: var obj = new Object ([value]); The value parameter is optional an can be of any type. Use the valueOf method to retrieve the value of an object. Another way to create an Object instance: var obj = { member1 : value1, member2 : value2, ....
Creating Objects Without PrototypesOriginally published in the A Drip of JavaScript newsletter. Last drip we talked about inheritance using prototypes and Object.create. But one point that sometimes surprises new JavaScript developers is that even ordinary "empty" objects are already part of an ...
I have a mongo database set up. creating a new date object in mongoDb create a date object in ISO format eg:ISODate("2012-07-14T00:00:00Z") I am using node.js to connect to mongo database and query the database. when ever I create a new date object (new Date()) in javascr...
Hence, Object.create() is an excellent choice for creating an object without going through its constructor. We'll be examining that application in the next instalment. For now, let's tackle how to assign the description. The solution of course is to supply it via the second parameter. ...