Dhananjay Ghanwat

Dhananjay Ghanwat

Software Enthusiast

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A list of all the posts and pages found on the site. For you robots out there is an XML version available for digesting as well.

Pages

Posts

Taking Initiative at work

3 minute read

Published:

People who have initiative and make things happen are highly valued in the workplace. But, what is it? And how can you develop it? Read more

Switching on, before you are on

1 minute read

Published:

This is also one of the many stories of a batting great, which puzzled me initially, but later on convinced me of how beneficial it can be to switched on before you are on Read more

Self Discipline: Key to Personal Success

3 minute read

Published:

This is one of the many stories of a batting great, which has stayed with me and shows how self discipline can he key to personal success. There are something which we can learn from great achievers of our time, especially how they overcome their failures by doing small things. Sachin Tendulkar arrived in Sydney with 82 runs from 5 innings, Read more

The R.I.S.E decision-making framework

1 minute read

Published:

Tensions inevitably arise between goodness and an imperfect world – but how should we act when they do? Well, there’s a four-step decision-making process we can use to untangle our reasoning and make sense of difficult, complex situations. It’s called the R.I.S.E framework. Read more

Choosing right over easy

3 minute read

Published:

When faced with a decision about what to do it is amazing how the easy choice and the “right” choice are rarely ever the same thing. Read more

How to survive as a programmer

6 minute read

Published:

Programming is fun and here are some tips gathered over 18 years of programming experience on how to survive (and excel) as a programmer Read more

Advanced Node.js

less than 1 minute read

Published:

I am starting a series of posts explaining few of Advanced Node.js concepts. Hope you like them Read more

Lord Ganesha - The Original Lateral Thinker

1 minute read

Published:

Two of the important traits of good software developers are “enlightened laziness” and “Out of the box” thinking.There is an ancient tale from Hindu mythology that illustrates lateral thinking Read more

New Skills in New World

3 minute read

Published:

In the quick changing technical world, where we are carrying digital money, shopping online and constantly being online all the time, it is difficult to work without digitization.  To become an outstanding IT professional in this new digital world, we require more skills than before. Read more

Thread Safety Strategies

4 minute read

Published:

Recently I was asked to look into a production issue in a payment application. After going through hours of debugging we could zero into the cause of the problem. Not surprisingly it was due concurrent requests from different users arriving at our server in same instant. Read more

portfolio

publications

talks

AWS: 30,000 feet view

Published:

Amazon Web Services (AWS) is a secure cloud services platform, offering compute power, database storage, content delivery and other functionality to help businesses scale and grow Read more

teaching

OOPS in Scala

chapter, Online, 2016

OOPS in Scala

Classes

  • Classes in Scala are static templates that can be instantiated into many objects at runtime
  • A Class can contain information about:
    • Fields
    • Constructors
    • Methods
    • Superclasses (inheritance)
    • Interfaces implemented by the class, etc.
      // Simple Class
class MyClass {}
  • Class in Scala is very much similar to Java or C++
  • Class contains fields and methods
    class Emp {
private var employeeNumber = 0
var employeeName =null
def display(empNumber: String, empName: String) = {
    println(s"Employee Number is ${empNumber}")
    println(s"Employee Name is ${empName}")
}
}
  • In Scala a class is NOT declared as public.
  • A source file can contain multiple classes.

  • All of the classes could be public

    Classes can be used as
    val emp = new Emp()
emp.display("8597","Dhananjay")
  • Parameter less method could be called with or without parentheses
  • Using any form is programmer’s choice
  • However, as convention
    • Use () for mutator method

    • Use no parentheses for accessor method

      Check your Understanding
  • What is the output of the following code ? ```scala class add { var x:Int=10 var y:Int=20 def add(a:Int,b:Int) { a = x + 1 println(s”Value of a after modification :${+a}”);
Read more

Scala

Workshop, Online, 2016

Scala is a deep and powerful language with many advanced features such as macros, implicits and existential types. This is a collection of basic training of Scala addressed at people who are getting started with Scala language or moving from Java to Scala. Read more

Introduction to Scala

chapter, Online, 2016

Introduction To Scala

Scala is a general purpose programming language, multiparadigm object oriented, functional, scalable Read more

Pattern Matching

chapter, Online, 2016

Pattern Matching

Scala has a built-in general pattern matching mechanism It allows to match on any sort of data with a first-match policy — alt —
  • Here is a second example which matches a value against patterns of different types: alt —

    Enumeration

  • Enumeration allows programmer to define their own data type
  • Often we have a variable that can take one of several values. For instance, a WeekDays field of an object could be either Mon, Tue, Wed, or Thu alt —

    Enumeration (cont’d)

  • Another way alt
  • Gives Error if value is not found alt
Read more

Scala Collections

chapter, Online, 2016

Scala Collections

Scala has a rich set of collection library
  • Collections are containers that hold objects
  • Those containers can be sequenced, linear sets of items like Arrays, List, Tuple, Option, Map, etc alt
Read more

Scala Essentials

chapter, Online, 2016

Scala Essentials

Data Types in Scala

  • A Data type tells the compiler about the type of the value to be stored in a location
  • Scala comes with the following built-in data types which you can use for your Scala variables alt —

    Data Types in Scala (cont’d)

    Few examples alt
Read more

Angular

Workshop, Online, 2017

Angular (2+) is here, and we’re all super excited about it. Let’s explore all the changes coming in Angular 2. If you come from the world of Angular 1, you may have heard that Angular 2 is a complete code change. While this can seem scary, let’s take a step back and look into what exactly is going on with the new version. There are reasons why Angular 2 is so different. In this course, we’ll take a look at how we can get started with Angular 2 and see all the cool new features Angular 2 provides. Read more

Angular: Overview

chapter, Online, 2017

Angular JS is an open source framework built over JavaScript. It was built by the developers at Google. This framework was used to overcome obstacles encountered while working with Single Page applications. Also, testing was considered as a key aspect while building the framework. It was ensured that the framework could be easily tested. The initial release of the framework was in October 2010. Read more

Environment

chapter, Online, 2017

To start working with Angular 2, you need to get the following key components installed. Read more