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Example 14

numbers = [1,2,3]
total = 0
numbers.each do |number|
  total += number
end

p total

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Rails v5.2 Cheatsheet

Updated by: Scott Borecki

[![LinkedIn: scott-borecki][linkedin-badge]][LinkedIn] [![Email: [email protected]][gmail-badge]][gmail] [![GitHub: Scott-Borecki][github-follow-badge]][GitHub]

Please reach out if you have any comments or suggestions for updates!

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Navigating

visit "/projects"
visit post_comments_path(post) # when using `resources` syntax

Clicking links and buttons

click_link "id-of-link" # click_link "#my-id"
click_link "Link Text" # click_link "View Task"

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It's important to note that running this reset will drop any existing data you have in the application

How to reset PG Database on Heroku?

• Step 1: heroku restart
• Step 2: heroku pg:reset DATABASE (no need to change the DATABASE)
• Step 3: heroku run rake db:migrate
• Step 4: heroku run rake db:seed (if you have seed)

One liner

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require "pry"
class Game #This game is called "guess what number the computer is thinking of"
   attr_reader :player_name, :computer_choice, :game_over

   def self.start
      game = Game.new
      game.get_players
 game.start_computer

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Rails v7.1.2 Cheatsheet

Updated by: Chris Simmons, based on the 5.2 Cheatsheet by Scott Borecki.

Please reach out if you have any comments or suggestions for updates!

Notes About this Cheatsheet

• This guide uses Rails version v7.1.2. Run rails -v to check your Rails version number.
• Code snippets in this cheatsheet starting with $:
• Run from the terminal, usually within your project directory.

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SQL & AR Practice Solutions

These prompts taken from this lesson. Highly suggest trying these on your own FIRST before comparing to these solutions.

---

1. Get all songs

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B3 Rails Cheatsheet

Faraday

• Docs

Getting a basic response:

  response = Faraday.get({url})

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Word Cloud in Ruby

You want to build a word cloud, an infographic where the size of a word corresponds to how often it appears in the body of text. For example, if we turn the Gettysburg Address into a word cloud, it might look like this.

To do this, you'll need data!

Write code that takes a long string and builds its word cloud data into a hash (or JSON object), where the keys are the words and the values are the number of times the words occurred.

Thinking it Through

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Return the nth Fibonacci

The Fibonacci series is a numerical series where each item is the sum of the two previous items. It starts off like this:

0, 1, 1, 2, 3, 5, 8, 13, 21 ...

Write a method called fib() that takes an integer n and returns the nth Fibonacci.