This chapter will help you put the concept of reactive programming in context with other programming styles, patterns, and paradigms. In the simplest non-jargon description, reactive programming is programming that makes it possible to easily handle modern software projects and apps that are likely to involve multiple users working at the same time with the same data.
Half a century ago it was possible to think of programming in the style of Hello World (the first program many people learned in classes). In Hello World, you type in a few lines of code (one to three, ...
