June 2022
Intermediate to advanced
130 pages
2h 45m
English
Content preview from Programmer Passport: ElixirBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Your Turn
Elixir macros are a rarely used but important feature. They’re used to write both Elixir code and beautiful APIs called domain specific languages.
Macros
Underneath, Elixir code is represented within the abstract syntax tree, or AST. A macro is code that writes code. Macros take a bit of the AST and translate it into other ASTs. The quote function lets developers convert Elixir code into the AST format, and the unquote function allows interpolation of Elixir code. Together, they can make existing Elixir code do new and interesting things.
A DSL is a domain specific language. While Elixir is a general-purpose programming language, a DSL uses the features of Elixir, especially macros, to represent other concepts. For example, the Ecto ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.