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rayway30419/default_proc.rb

Created March 1, 2018 16:00
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Hash#default_proc
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default_proc.rb
deep_hash = Hash.new { |h,k| h[k] = Hash.new(&h.default_proc) }
deep_hash[:a][:b][:c][:d] = 'Hello World'
puts deep_hash
# {:a=>{:b=>{:c=>{:d=>"Hello World"}}}}
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