Ruby Practice

readme.md

Some Ruby Exercises

1.) Fizzbuzz ("Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”.")

2.) Array manipulation (sort, plucking uniq values, checking existence of a value)

3.) Iterating over a Hashmap and an array

4.) Write a ruby script that takes a person's age in an integer and spits out their estimated birth date

5.) Write a ruby script that uses a nested conditional or case statement to output certain text based on input

array.rb

# Given this array of Animals,
array = ['cow', 'sheep', 'sheep', 'pig', 'tiger', 'pig', 'lion', 'bear', 'cat']

# We can be sure we return only the unique values
animals = array.uniq

# Let's loop through and print them out
animals.each do |animal|
  puts animal
end

# We want to get the first result in the array
puts animals[0] + " or " + animals.first

# We can last get the last value or others 
puts animals.last

# We can sort our array
puts animals.sort

# We can also check to see if the array includes a value we want
# include? will return true or false
puts "the array has a cow" if animals.include? 'cow'
puts "the array does not have a fish" unless animals.include? 'fish'

birthday_estimator.rb

require 'date'

puts "Hello, I'm going to guess a year timeframe in which you were born."
puts "Please enter your age in numbers. (Example: 32)"
age = gets.chomp.to_i

if age > 0
  puts "You entered that you were #{age} years old"
else
  puts "Please try entering your age again."
  age = gets.chomp.to_i
end

# We know their age, so let's grab the current date
current_date = Date.today

# Find out how many months old they are
# We need to add 12 months to account for the year gap
# Because the user just enters an age, their bday could have been today for all we know
month_age = (age * 12) + 12
estimated_birth_date = current_date >> -month_age

puts "Your estimated birthdate is between #{estimated_birth_date} and #{estimated_birth_date.next_year}"

dogs.rb

# Write a ruby script that uses a nested conditional or case statement to output certain text based on input

class Dog
  attr_accessor :breed
  attr_accessor :size

  def initialize(breed, size)
    @breed = breed
    @size = size
  end
end

puts "Hello, please enter information about your dog."

print "What breed is your dog (labrador, bulldog, poodle): "
breed = gets.chomp.to_s.downcase

print "What size is your dog? (small, medium, large): "
size = gets.chomp.to_s.downcase

dog = Dog.new(breed, size)
puts "------------------------"

case dog.breed
when "lab", "labrador"
  puts "Labradors have a estimated lifespan of 10 to 12 years on average."

  if dog.size == "small"
    puts "Your #{dog.breed} is just a puppy, and has a lot of growing to do!"
  elsif dog.size == "medium"
    puts "Your #{dog.breed} will grow to be bigger still!"
  elsif dog.size == "large"
    puts "Your #{dog.breed} is an adult."
    puts "Many adult female Labradors reach a weight of 55-75lbs and stand 21-22 inches high at the shoulder."
    puts "Many adult male Labradors reach a weight of 65-85lbs and stand 22-23 inches at the shoulder"
  else
    puts "Sorry it appears you mistyped the size"
  end


when "poodle"
  puts "Poodles have an estimated life span of 12-15 years on average."

  if dog.size == "small"
    puts "Your #{dog.breed} is just a puppy, and has a lot of growing to do!"
    puts "While poodles are one of the smaller dog breeds, they make fantastic companions."
  elsif dog.size == "medium"
    puts "Your #{dog.breed} is most likely under 5lbs."
  elsif dog.size == "large"
    puts "An average adult poodle can be anywhere between 5lbs and 8lbs."
  else
    puts "Sorry it appears you mistyped the size"
  end

when "bulldog", "bull"
  puts "Bulldogs have an estimated life span of 8 to 10 years on average."

  if dog.size == "small"
    puts "Your #{dog.breed} is just a puppy, and has a lot of growing to do!"
  elsif dog.size == "medium"
    puts "Your #{dog.breed} will grow to be bigger still!"
  elsif dog.size == "large"
    puts "Your #{dog.breed} is an adult."
  else
    puts "Sorry it appears you mistyped the size"
  end


else
  puts "I've never heard of that dog breed before!"
end

fizzbuzz.rb

#  Write a program that prints the numbers from 1 to 100.
# But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”.
# For numbers which are multiples of both three and five print “FizzBuzz”.

(1..100).each do |i|
  if i % 3 == 0 && i % 5 == 0
    puts "FizzBuzz"
  elsif i % 3 == 0
    puts "Fizz"
  elsif i % 5 == 0
    puts "Buzz"
  else
    puts i
  end
end

# Because most of the community prefers each or map instead of for loops I went with the answer above
# But for is another way of doing it with basically the same code. 
for i in 1..100
  if i % 3 == 0 && i % 5 == 0
    puts "FizzBuzz"
  elsif i % 3 == 0
    puts "Fizz"
  elsif i % 5 == 0
    puts "Buzz"
  else
    puts i
  end
end

hashmap.rb

hashmap = { :face => "big", :shoulders => "wide", :legs => "tall" }

hashmap.each do |key,value|
  puts key
  puts value
end

# If you only wanted the key you could do
hashmap.each_key do |key|
  puts key
end

# If you only wanted the values you could use
hashmap.each_value do |v|
  puts v
end

# Checking to see if the key is there can be done with
hashmap.include?(:face)
hashmap.key?(:face)

# You can add a new key/value pair to the hash with
# You can also use this to update values
hashmap[:feet] = "wide"
hashmap[:face] = "skinny"

puts hashmap

# You can delete data from the hash by
hashmap.delete(:legs)

puts hashmap

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