array_practice.rb

# elements = []
#
# (0..5).each do |num|
#   puts "adding #{num} to the list"
#   elements.push(num)
# end
#
# p elements


# In the exercises below, write your own code where indicated
# to achieve the desired result.

# Two examples are already completed. Your task is to complete
# any remaining prompt.




#-------------------
# PART 1: Animals: Array Syntax
#-------------------

# EXAMPLE: write code below that will print an array of animals.
# Store the array in a variable.
# animals = ["Zebra", "Giraffe", "Elephant"];
# p animals
#
# # EXAMPLE: Write code below that will print "Zebra" from the animals array
# # YOUR CODE HERE
# p animals[0]
#
# # YOU DO: Write code below that will print the number of elements in array of
# # animals from above.
# puts animals.count
#
#
# # YOU DO: Write code that will reassign the last item in the animals
# # array to "Gorilla"
# animals[2] = "Gorilla"
# p animals
#
#
# # YOU DO: Write code that will add a new animal (type of your choice) to position 3.
# animals << "Cat"
# p animals

# YOU DO: Write code that will print the String "Elephant" in the animals array


#-------------------
# PART 2: Foods: Array Methods
#-------------------

# YOU DO: Declare a variable that will store an an array of at least 4 foods (strings)
foods = ["pizza", "cheese", "burgers", "cookies"]

# YOU DO: Write code below that will print the number of elements in the array of
# foods from above.
p foods.count


# YOU DO: Write code below that uses a method to add "broccoli" to the foods array and
# print the changed array to verify "broccoli" has been added
def add_broccoli(foods)
  foods.push("broccoli")
  p foods
end
add_broccoli(foods)


# YOU DO: Write code below that removes the last item of food from the foods array and
# print the changed array to verify that item has been removed
def remove_last(items)
  items.pop
  p items
end

remove_last(foods)

# YOU DO: Write code to add 3 new foods to the array.
  # There are several ways to do this - choose whichever you'd like!
# Then, print the changed array to verify the new items have been added

# YOU DO: Remove the food that is in index position 0.
foods.shift
p foods
#-------------------
# PART 3: Where are Arrays used?
#-------------------


# Sometimes we need to hold on to multiple pieces of data, but have it grouped together in a list.
# This is why programming languages have arrays!

# One example of a web/mobile application that uses arrays is Instagram. Each user has a set of posts
# associated with their account. Each post, is one of potentially many, that are grouped together in a list, or, array.

# The post itself likely has more complex data, but here is one way we can think about it:


posts = ["image at beach", "holiday party", "adorable puppy", "video of cute baby"];