Errors in counter hashes- section

App Academy Open Curriculum Feedback
#1

without a default value

dog_breeds = {“corgi”=>“short and sweet”, “labrador”=>“labradorable”}
dog_breeds[“Australian cattle dog”] #=> nil

with a default value

default_cuties = Hash.new(“cutie”)
dog_breeds[“vizsla”] #=> “cutie”

accessing a nonexistent key doesn’t alter the hash

dog_breeds #=> {}

default_cuties is a new variable that is otherwise referenced no where. I am sure I will figure out how to use Hash.new on my own but this tutorial does not teach it. If you run this code in your terminal you will see that the example code returns nil not cutie as the tutorial says it will.

1 Like
#2

def most_common_vowel(string)
vowels = %w(a e i o u)
counts = Hash.new(0) # Give the hash a default value of 0

string.each_char do |character|
counts[character] += 1 if vowels.include?(character)
end

counts.sort_by {|k, v| v}.last.first
end

Is an answer as given in the lessons on that alpha course: However this does not satisfy the alphabetical order caveat of the problem.

1 Like