reduce

taman9333 · @taman9333 · about 4 years

Functional way for implementing reduce.

it invokes function for each element in the enumerable with the accumulator.


def reduce(enum, acc, func)

  reduce_aux = lambda do |acc, enum|

    if enum.empty?

      acc

    else

      reduce_aux.call(func.call(acc, enum.first), enum.drop(1))

    end

  end

  reduce_aux.call(acc, enum)


end




# Example



# irb> reduce([1,2,3], 2, -> (x, y) {x+y})



# => 8
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