difference between Hash.new and Hash.new { |h, k| h[k] = [] }
h = Hash.new { |h, k| h[k] = [] }
h[:a] # => {:a=>[]}
h[:b] << 123 # => {:a=>[], :b=>[123]}difference between Hash.new and Hash.new { |h, k| h[k] = [] }
h = Hash.new { |h, k| h[k] = [] }
h[:a] # => {:a=>[]}
h[:b] << 123 # => {:a=>[], :b=>[123]}Copyright © 2021 Codeinu
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