Hashes

Question 1

What is a hash?

Question 2

what is a key in a hash?

Answer 2

in a hash there are “keys” that must be unique and cannot be duplicated. we use keys to store data in a hash.

Question 3

explain .has_key?()

Answer 3

this method is used to find if there is a certain key inside a hash. you must call the key in the parameters. dog.has_key?(“name”)

Question 4

explain .has_value?()

Answer 4

this used to find the value in a hash and it will return a boolean

Question 5

explain hash.keys[] and hash.values[]

Answer 5

hash.keys is used to get all keys in an array. since its turned into an array you can call each array by providing an index.
hash.keys[1]

hash.values works exactly the same just targeting the values.

Question 6

explain .each_key and .each_value

Question 7

explain =>

Answer 7

this is what programmers call the rocket. it used to give value to a key in a hash

Question 8

explain .Hash.new()

Question 9

explain my_hash[“a”] => “yes”
what does this do?