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divmod 

        # Float.divmod

(from ruby core)
---
    divmod(other) -> array

---

Returns a 2-element array `[q, r]`, where

    q = (self/other).floor      # Quotient
    r = self % other            # Remainder

Examples:

    11.0.divmod(4)              # => [2, 3.0]
    11.0.divmod(-4)             # => [-3, -1.0]
    -11.0.divmod(4)             # => [-3, 1.0]
    -11.0.divmod(-4)            # => [2, -3.0]

    12.0.divmod(4)              # => [3, 0.0]
    12.0.divmod(-4)             # => [-3, 0.0]
    -12.0.divmod(4)             # => [-3, -0.0]
    -12.0.divmod(-4)            # => [3, -0.0]

    13.0.divmod(4.0)            # => [3, 1.0]
    13.0.divmod(Rational(4, 1)) # => [3, 1.0]

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