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Mastering Javascript Functional Programming : Become skilled with Functional Programming in JavaScript by applying Javascript concepts to real world development problems by Federico Kereki

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Starting Out with Functions - A Core Concept

In chapter 2Thinking Functionally - A First Example, we went over an example of FP thinking, but let's now go to the basics, and review functions. In Chapter 1, Becoming Functional - Several Questions, we mentioned that two important JS features were functions as first-class objects and closures. Now, in this chapter, let's:

  • Examine some key ways of defining functions in JS
  • Go in detail regarding arrow functions, which are closest to the lambda calculus functions
  • Introduce the concept of currying
  • Revisit the concept of functions as first-class objects

We'll also consider several FP techniques, such as:

  • Injection, as needed for sorting with different strategies and other uses
  • Callbacks and ...

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