cljs.math/decrement-exact

function

since v1.11.50

Edit

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Source docstring:

Returns a decremented by 1, throws ArithmeticException on overflow. 

(defn ^number decrement-exact
  {:added "1.11.10"}
  [a]
  (if (or (<= a js/Number.MIN_SAFE_INTEGER) (> a js/Number.MAX_SAFE_INTEGER))
    (throw (ex-info "Integer overflow" {:fn "decrement-exact"}))
    (dec a)))

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