Beginning Functional JavaScript. Functional Programming with by Anto Aravinth

By Anto Aravinth

Learn practical programming techniques utilizing JavaScript ES6. you'll examine techniques corresponding to currying, partial capabilities, higher-order capabilities, and monads.

Programming languages have developed from concentrating on systems to things and now on function. JavaScript supports sensible programming and permits builders to write down well-crafted code.

What you'll Learn:   

  • Master useful programming concepts
  • Identify how features are handled in JavaScript
  • Understand real-world sensible libraries and create a sensible library that mimics underscore.js
  • Perform pure-error dealing with strategies akin to functors and monads
  • Discover ES6 practical gains reminiscent of unfold operators and generators

Who This e-book Is For:

JavaScript builders (or rookies) who are looking to comprehend practical programming thoughts and the sensible nature of the language.

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Extra info for Beginning Functional JavaScript. Functional Programming with JavaScript using EcmaScript 6

Example text

Let’s get started! Chapter 3 ■ Higher-Order Functions ■■Note We will be creating few higher-order functions and adding it to our library. We are doing this for understanding how things work behind the scenes. The library is good for learning the current resources but they are not production ready for the library. So keep that in mind. :) Understanding Data As programmers we know our programs act on data. Data is something that is very important for the consumption of our written program to execute.

Later we will be moving to see more real-world examples of how HOC can help a programmer to solve complex problems easily. As before, we will be adding the HOC functions that we are creating in the chapter in our library. Let’s get started! Chapter 3 ■ Higher-Order Functions ■■Note We will be creating few higher-order functions and adding it to our library. We are doing this for understanding how things work behind the scenes. The library is good for learning the current resources but they are not production ready for the library.

The important point to note here is that we have declared a variable called done and set it to false initially. The returned function will have a closure scope over it; hence it will access it to check if done is true, if return undefined else set done to true (thus preventing next time execution) and calling the function with necessary arguments. 52 Chapter 4 ■ Closures and Higher-Order Functions ■■Note The apply function will allow us to set the context for the function and also pass on the arguments for the given function.

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