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#scan_left: A lazy, incremental alternative to Ruby’s #inject
scanleft: A Lazy, Incremental Alternative to #inject — The major difference here is scanleft returns an array of the value change per iteration versus a single, scalar result.
scanleft: A Lazy, Incremental Alternative to #inject — The major difference here is scanleft returns an array of the value change per iteration versus a single, scalar result.