cljs.math/floor-div

function

since v1.11.50

Edit

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Source docstring:

Integer division that rounds to negative infinity (as opposed to zero).
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#floorDiv-long-long-

(defn ^number floor-div
  {:added "1.11.10"}
  [x y]
  (if-not (and ^boolean (js/Number.isSafeInteger x) ^boolean (js/Number.isSafeInteger y))
    (throw (ex-info "floor-div called with non-safe-integer arguments"
                    {:x-int? (js/Number.isSafeInteger x) :y-int? (js/Number.isSafeInteger y)}))
    (let [r (long (/ x y))]
      (if (and (xor (< x 0) (< y 0)) (not (== (* r y) x)))
        (dec r)
        r))))

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