Module: Enumerable

Defined in:
lib/rubyc/core_extensions.rb

Instance Method Summary collapse

Instance Method Details

#count_by ⇒ Object 



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# File 'lib/rubyc/core_extensions.rb', line 2

def count_by
  self.inject({}) do |memo, elem|
    key = yield elem
    memo[key] ||= 0
    memo[key] += 1
    memo
  end
end

#uniq_by ⇒ Object 



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# File 'lib/rubyc/core_extensions.rb', line 11

def uniq_by
  each_with_index.inject({}) do |memo, (obj, index)|
    val, data = yield obj
    memo[val] ||= data
    memo
  end.values
end