Blogs
For building an application with user friendly and consistent UI, we generally use the concept of "master page" and "layouts", so that just the content can vary within the pages. This helps user to easily navigate through the website as well as faster loading of the web pages. For example, generally we make header and footer static...
In our node js application, we can use variety of templating engines like "jade" , "ejs", "mustache" etc. Dust.js is an asynchronous templating engine which can be used both on server side as well as client side and provide easy caching with high performance. In my previous blog on EJS as a templating engine, i have mentioned how we...
AngularJSFront End Development
While using AngularJS, you will usually come across this situation when you want to copy one object to another object. In such case you will have only two solutions: angular.copy() or angular.extend(). Lets see how these solutions work. 1. angular.copy(source, destination) : It creates a deep copy of source object or array and...
EJS as the name implies embedded JavaScript, is a JavaScript templating library used to render html code along with JSON data in an easy and clean way. In a Node.JS application(here we are using an express application), you need to set the value of 'view engine' parameter to 'ejs'. [js] var app = express(); app.set('view engine',...
AngularJSFront End Development
While using AngularJS, we come across situation in which we want to display some data in certain format or some specific condition to be applied on the data. In this case, filters comes to rescue. We can define our custom filters and return filtered data in whichever way we want to display it. Lets learn it through an example: ...
We can create collections in mongoDb on which we can apply size limit. These special type of collections are called Capped Collections. These are a kind of circular queues, in which if allocated size limit is reached, it makes space for new documents by overwriting the oldest documents in the collection. How to create Capped...
Two commonly known ways to execute a script in Node.JS are using eval () function or running it using VM module. Lets see this through an example: [js] var vm = require('vm'); this.name = "Sakshi"; var script = "this.name = 'Tyagi'", withVM, withEVAL; withEVAL = eval(script); console.log("withEVAL...
In extension to my previous blog on Event Emitters Event Emitters In Node.JS, here we will see some variations in implementing Event Emitters. We can bind more than one listeners to an event. For example: [js] var events = require('events'); var eventEmitter = new events.EventEmitter(); var printFruit = function printFruit() { ...
We can create constants in JavaScript using 'const' keyword. [js] const name = 'Sakshi' console.log(name) [/js] This will print: Sakshi Now, if we try to change or re-initialize 'name' constant, the value will not change. [js] const name = 'Hello' console.log(name) [/js] This will again print: Sakshi Compatibility: 'const'...