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Elixir Cookbook

Elixir Cookbook

By : Paulo Pereira
4.5 (2)
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Elixir Cookbook

Elixir Cookbook

4.5 (2)
By: Paulo Pereira

Overview of this book

This book is intended for users with some knowledge of the Elixir language syntax and basic data types/structures. Although this is a cookbook and no sequential reading is required, the book’s structure will allow less advanced users who follow it to be gradually exposed to some of Elixir’s features and concepts specific to functional programming. To get the most out of this book, you need to be well versed with Erlang.
Table of Contents (11 chapters)
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10
Index

Joining strings


As we mentioned in the introduction, strings are binaries. In this recipe, we will use the binary concatenation operator (<>) to join strings.

Getting ready

In this recipe, we will use an IEx session, so let's start it by entering iex in our command line.

How to do it…

To join (concatenate) two strings, follow these steps:

  1. Define string_one:

    iex(1)> string_one = "Hello"
    "Hello"
    
  2. Define string_two:

    iex(2)> string_two = "World"
    "World"
    
  3. Join both strings:

    iex(3)> string_one <> string_two
    "HelloWorld"
    
  4. Make it look a lot better:

    iex(4)> string_one <> " " <> string_two <> "!"
    "Hello World!"
    

How it works…

The Kernel module defines a macro to concatenate two binaries. Think of this macro as a <> operator that works by appending the binary defined on the right-hand side to the binary defined on the left-hand side. In step 3, we used previously defined strings and concatenated them using <>.

The operation is associative. In step 4, we concatenated...

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