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felipec/scanl.rb

Created January 12, 2018 01:21
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Simple scanl implementation
Raw
scanl.rb
class Array
def scanl(init)
self.reduce([init]) { |a, e| a.push(yield(a.last, e)) }
end
end
accum = [5, 10, 15].scanl(0) { |a, b| a + b }[1..-1]
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