module Enumerable
Public Instance Methods
key_map(key)
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# File lib/finishing_moves/enumerable.rb, line 3 def key_map(key) map { |h| h[key] } end
key_map_reduce(key, arg = :+, &block)
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# File lib/finishing_moves/enumerable.rb, line 7 def key_map_reduce(key, arg = :+, &block) if block_given? # arg is the initial value of memo key_map(key).reduce(arg, &block) else # arg is a named method raise ArgumentError.new "arg must be a method symbol" unless arg.is_a? Symbol key_map(key).reduce(arg) end end