module Enumerable
Public Instance Methods
map_h() { |key| ... }
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Similar to Enumerable#map, but builds a hash of the results using the original value as the key.
['john', 'paul', 'george', 'ringo'].map_h { |name| name.length } # => {'john' => 4, 'paul' => 4, 'george' => 6, 'ringo' => 5}
# File lib/map_h.rb, line 7 def map_h {}.tap do |result| each do |key| result[key] = yield key end end end