Array and Hashes

Question 1

how to access the 3rd element in an array?

Answer 1

array_name[2]

Question 2

how to access a hash value?

Answer 2

hash_name[“key”]

Question 3

create a new hash called pets, and add dog > daisy to it.

Answer 3

pets = Hash.new
pets["dog"] = "daisy"

Question 4

iterate through the array called my_array and the hash called my_hash.

Answer 4

my_array.each { |x| puts “#{x}” }

my_hash.each { |x, y| puts “#{x} : #{y}” }

Question 5

how to access mina in this array: my_array = [[sara, mina], [fady, nancy]]

Answer 5

my_array[0][1]

Question 6

how to create an empty hash with a default value?

Answer 6

my_hash = Hash.new(“The default value”)

so when you call a non existed key, you will get the default value.

Question 7

sort a hash into an array of arrayes

Answer 7

my_array = my_hash.sort_by do |key, value|
value
end
my_array.reverse! #to order it higher to lower