/Ruby/Difference between Hash.new and Hash.new { |h, k| h[k] = [] }

Difference between Hash.new and Hash.new { |h, k| h[k] = [] }

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]}

0

Source: stackoverflow.com

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