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Learning Elixir

Learning Elixir

By : Kenny Ballou, Kenneth Ballou
5 (1)
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Learning Elixir

Learning Elixir

5 (1)
By: Kenny Ballou, Kenneth Ballou

Overview of this book

Elixir, based on Erlang’s virtual machine and ecosystem, makes it easier to achieve scalability, concurrency, fault tolerance, and high availability goals that are pursued by developers using any programming language or programming paradigm. Elixir is a modern programming language that utilizes the benefits offered by Erlang VM without really incorporating the complex syntaxes of Erlang. Learning to program using Elixir will teach many things that are very beneficial to programming as a craft, even if at the end of the day, the programmer isn't using Elixir. This book will teach you concepts and principles important to any complex, scalable, and resilient application. Mostly, applications are historically difficult to reason about, but using the concepts in this book, they will become easy and enjoyable. It will teach you the functional programing ropes, to enable them to create better and more scalable applications, and you will explore how Elixir can help you achieve new programming heights. You will also glean a firm understanding of basics of OTP and the available generic, provided functionality for creating resilient complex systems. Furthermore, you will learn the basics of metaprogramming: modifying and extending Elixir to suite your needs.
Table of Contents (11 chapters)
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10
Index

Abstract syntax trees


ASTs are not just a concept of your programming language course. They are real and very useful in the real world.

Abstract syntax trees are the representation of our language compilers (or interpreters) used when parsing and translating written code into a new form, bytecode (for example, Elixir, Erlang, Python, and Java), machine code (for example, C/C++ and assembler), or another language (for example, Less, CoffeeScript, and so on). This, typically internal representation is where the majority of the language expression is broken down into its components for translation or evaluation.

Fortunately, for us, José Valim, and those before him with Erlang decided that the AST should be available to the programmer as first-class datatypes. That is, we can view, evaluate, and manipulate the AST of our code at compile time. This access is what enables metaprogramming. With access to the AST and the ability to manipulate it to suit our needs, we are able to write code that writes...

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