gistfile1.txt

# Example Code
# For blog entry about Ruby Arrays and Hashes

# Ruby Arrays #

# define an array with three elements
my_friends = ["James", "Ana", "David"]

# Displays the number of elements in the array (how many friends do I have?)
puts my_friends.length

puts my_friends[0] # the first friend, James
puts my_friends[1]
puts my_friends[2] # the last friend in the array -- David

###

my_friends = ["James", "Ana", "David"]

my_friends.push("Brian")

# check the contents of the array
p my_friends

my_friends.push("Landon")
my_friends.push("Cindy")

# check the contents of the array again
p my_friends

# removes the last item that was added to the array
my_friends.pop

# check the contents of the array
p my_friends

# removes the *first* item that was added to the array
my_friends.shift

# check the contents of the array
p my_friends

# replace the third element in the array with a new one
my_friends[2] = "Mark"	

# check the contents of the array
p my_friends

# Ruby Hashes #

my_favorite_celebrity = {
  "name" => "Anita Greatness", 
  "age" => 32, 
  "height" => 1.66 
}

puts my_favorite_celebrity["name"]
puts my_favorite_celebrity["age"]
puts my_favorite_celebrity["height"]

###

# add a new key-value pair to the hash
my_favorite_celebrity["hometown"] = "San Francisco"

# conveniently check the contents of the hash
p my_favorite_celebrity

# replace an existing key-value pair with a new value
my_favorite_celebrity["name"] = "Anthony Greatdude"

# conveniently check the contents of the hash
p my_favorite_celebrity

###

# picking up from the previous code
p my_favorite_celebrity

my_favorite_celebrity.delete("age")

# check the contents of the hash
p my_favorite_celebrity