Dictionary show action for letters, alphabetical links helper

app/controllers/dictionary_controller.rb

@@ -3,4 +3,9 @@ class DictionaryController < ApplicationController
     @parts_of_speech = PartOfSpeech.all
     @words = Word.all
   end
+
+  def show
+    @letter = params[:id]
+    @words = Word.where('substr(word, 1, 1) = ?', @letter)
+  end
 end

app/helpers/dictionary_helper.rb

@@ -1,2 +1,10 @@
 module DictionaryHelper
+  LETTERS = ['i', 'u', 'e', 'o', 'a', 'm', 'n', 'p', 't', 'k', 's', 'w', 'l', 'j'].sort
+
+  def alphabetical_links
+
+    LETTERS.map do |l|
+      link_to l.to_s, dictionary_path(l)
+    end.join("\n")
+  end
 end

app/views/dictionary/index.html.erb

@@ -1,6 +1,8 @@
 <h1>Dictionary#index</h1>
 <p>Find me in app/views/dictionary/index.html.erb</p>
 
+<%= sanitize alphabetical_links, tags: ["a"] %>
+
 <p><%= @parts_of_speech.count %> parts of speech entries in database</p>
 <h1>Parts of Speech</h1>
 <table>

app/views/dictionary/show.html.erb

@@ -0,0 +1,9 @@
+<div>
+  <%= @letter.to_s %>
+</div>
+
+<% @words.each do |word| %>
+  <div>
+    <h1><%= word.word %></h1>
+  </div>
+<% end %>