June 2022
Intermediate to advanced
130 pages
2h 45m
English
Content preview from Programmer Passport: Elixir
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Pattern Matching and Lists
Matching tuples is easy in Elixir because tuples have fixed sizes. For example, our points all have two elements. Lists are a bit trickier to match because they can be any length. Let’s match a few lists.
| | ie> list |
| | [1, 2, 3] |
| | ie> [head|tail] = [1, 2, 3] |
| | [1, 2, 3] |
| | iex> head |
| | 1 |
| | iex> tail |
| | [2, 3] |
| | iex> [] = [1, 2, 3] |
| | ** (MatchError) no match of right hand side value: [1, 2, 3] |
| | (stdlib) erl_eval.erl:453: :erl_eval.expr/5 |
| | (iex) lib/iex/evaluator.ex:257: IEx.Evaluator.handle_eval/5 |
| | (iex) lib/iex/evaluator.ex:237: IEx.Evaluator.do_eval/3 |
| | (iex) lib/iex/evaluator.ex:215: IEx.Evaluator.eval/3 |
| | (iex) lib/iex/evaluator.ex:103: IEx.Evaluator.loop/1 |
| | (iex) lib/iex/evaluator.ex:27: IEx.Evaluator.init/4 |
| | iex> ... |
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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.