Module: Enumerable
- Defined in:
- lib/finishing_moves/enumerable.rb
Instance Method Summary collapse
Instance Method Details
#key_map(key) ⇒ Object
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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) ⇒ Object
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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 |