How do I iterate over an array of hashes, so that I get the following type of list:
title[0]
description[0]
description[1]
title[1]
description[2]
description[3]
@example =
[
{title: "chapter1", description: "Hello all"},
{title: "chapter1", description: "This is an example"},
{title: "chapter2", description: "This is chapter 2"},
{title: "chapter2", description: "Another example"},
]
<% @example.each_with_index do |item, index| %>
<h1><%= item[:title] %></h1>
<p><%= item[:description] %></p>
<% end %>
How do I modify the above code so that if item[:title] == "chapter1", then it loops over the descriptions, and after that it goes through item[:title] == "chapter2" descriptions? I would like to show only the descriptions that belong to the title. Do I have to use a case...when statement, or is there a nicer way to do it?
To use the above example, I would like it to be:
<h1>Chapter 1</h1>
<p>Hello all</p>
<p>This is an example</p>
<h1>Chapter 2</h1>
<p>This is chapter 2</p>
<p>Another example</p>
>Solution :
You can achieve this by using group_by:
<% @example.group_by{|item| item[:title]}.each do |title,array| %>
<h1><%= title %></h1>
<% array.each do |item| %>
<p><%= item[:description] %></p>
<% end %>
<% end %>