We all know that javascript is a synchronous programming language but callback functions help to make it an asynchronous programming language.

By the Definition of Javascript, MDN Promises is,

The Promise the object represents the eventual completion (or failure) of an asynchronous operation and its resulting value.

Basically, promises are the same as real-life promises which we are making in real life.

Take an example, suppose you make a promise to your friends that are next weekend you will take them to a party.

But actually, you don't know you will get time on the weekend or not, means either…

To become a javascript or web developer we must know how javascript works internally. By understanding this you will get to know how to write non-blocking code.

The Javascript Engine

It is an engine that executes your javascript programs or code. the most popular javascript engine is V8.

Jasypt is a Java library which provides us to add basic encryption capabilities to projects with minimum effort and without writing any code !! 😀

let's see how we can do that…

Steps To Add Encryption Using Jasypt :

1. Add Dependency in your pom.xml
2. Add annotation in the Spring Boot Application main Configuration class
3. Select a secret key to be used for encryption and decryption
4. Generate Encrypted Key
5. Add the encrypted key in the config file (application.properties)

1. Add Dependency in your pom.xml

In your pom.xml file add maven dependency which is easily available at maven repository. Here I am using 2.1.0 version of it.

<dependency>…

To access multiple database in application sprint boot makes easy way to do this. In this article, You will get idea to configure it, here we are going to configure two mysql databases for spring boot application.

Steps: -

1.Add multiple datasource configuration in to your application.properties.
2.Create Configuration class with providers @Bean i.e connection to database.
3. Create Base service to select datasource i.e Generate query.
4. Call Base from DAO to get result from two database

1.Add multiple datasource configuration in to your application.properties

Create two database names as employee and student and add its credintial details in same file.

application.properties

spring.datasource.employee.jdbc-url=jdbc:mysql://localhost/employee?autoReconnect=true&useSSL=false
spring.datasource.employee.username=empuser
spring.datasource.employee.password=emppwd
spring.datasource.employee.driver-class-name=com.mysql.jdbc.Driverspring.datasource.student.jdbc-url=jdbc:mysql://localhost/student?autoReconnect=true&useSSL=false spring.datasource.student.username=studuser spring.datasource.student.password=studpassword…

The last month gets new version release Angular 10.0.0 only 4 months after version 9 of Angular, Lets see whats new features are available to use:

Features

1. New Date Range Picker
2. Strict Mode
3. Default browsers changed
4. Typescript Updates
5. Warnings about CommonJS imports

New Date Range Picker

Angular material now includes new date range picker, here you can select start and end date.