First and foremost, I would like to thank my wife, Aboli, for always being there for me and my family. Although I piss her off sometimes with my incessant questions, I admire her decision-making skills and insightful answers. Hopefully, I'll learn from her one day. She even let me take almost a year off from work while she was the earning partner. I hope to return the favor soon. Thanks also to my kids for being patient with me while I was writing and for doing their own studies too—I'll certainly spend more time with them after this book is done.

I am lucky to have not just loving and supportive parents but also a caring and trustworthy extended family, because of my upbringing in a joint family (which is rare these days). Life would certainly be less fun without my uncles, aunts, and dear cousins. Thanks to my many friends for sharing their good (and bad) thoughts, learning, and insights.

Thanks are also due to all my teachers from the schools and colleges I attended for sharing their knowledge and making me capable in this journey of life. Special thanks to my illustrious uncle, Dr. Ganesh Tarey, for teaching me mathematics and physics (the two dreaded subjects) and my brilliant cousin, Anil Bhatnagar, for teaching me many fun math techniques—I started liking math and computers because of you both.

Countless thanks to the creators/maintainers and contributors of excellent open source software/languages/frameworks—software development would be utterly boring without your selfless efforts. Thanks also to all the wonderful authors from whose books I've learned so much—finishing a book is such a Herculean effort in itself.

Thanks to Packt Publishing for giving me the chance to become an author and the entire team at Packt Publishing who endured with me throughout this journey. Special thanks to Meeta Rajani, Arwa Manasawala, and Shruti Rawool for being patient with me and pushing me gently to finish chapter after chapter. This book wouldn't be in your hands without their efforts and help.

My sincerest and heartfelt thanks to the reviewers: Mark, Pavlo, Mourad, and Arvind. They not only pointed out some errors in the code, but also gave excellent suggestions to improve the code and the content. This book is in a much better shape because of you all.

Thanks to the entire IDFC team at Indus software, where I learned the tricks of the trade. Thanks to HCL technologies for my first ever trip to USA and also to the entire team at SunGard Offshore Services, Pune, India, and SunGard Investran, USA, with whom I've spent some fruitful years of my career. I would also like to thank my entire team at PJM Interconnection, USA, for one of the best projects and probably the best work culture. Last but not least, thanks to Intelliheads Technology and my boss, Daniel Niasoff, for letting us use AngularJS—you are the root cause of this book.