In the section of Chapter 4 that discusses the Hash class / data structure and iteration over hashes, under the subheading Blocks and Enumeration, the example given is of the form myHash.each { |index| ...}. Specifically, it’s:
top_five.each do |i|
word = top_five[i][0]
count = top_five[i][1]
puts "#{word}: #{count}"
end
… which doesn’t work, because each passes each key-value pair as an array to the block in that case, not an index.
The example is also not the code previously encountered, as alleged, which was:
top_five.reverse_each do |word, count|
puts "#{word}: #{count}"
end
As a Ruby nuby, I had to investigate and demonstrate to myself what the each method pases to a block that takes a single parameter. At first, I thought it would pass key alone, but no, it’s [key, value]. Good to know. Maybe that should be mentioned explicitly. If the book contained exercises (I haven’t seen any yet), it would be a good exercise for the reader to go to replit.com or irb etc. and find out, given that I don’t recall the point having been made prior to the mentioned subheading.
I imagine this is what was intended, fwiw:
top_five.each_pair do |pair|
word = pair[0]
count = pair[1]
puts "#{word}: #{count}"
end
It works, but obviously can be rendered more elegant.