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November 23, 2017 08:54
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Initializing hashes and subhashes
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# Initialize missing values for subhashes | |
h = Hash.new { |h,k| h[k] = Hash.new(&h.default_proc) } #=> {} | |
h['a']['b']['c'] = 'd' | |
h #=> {"a"=>{"b"=>{"c"=>"d"}}} | |
# Initialize values for hash, for specific given keys | |
list = %w[ a b c ] | |
hash = Hash[list.collect { |i| [ i, 0 ] }] | |
# Initialize hash with default value of 0 for any given key | |
hash = Hash.new { |h, k| h[k] = 0 } |
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