Checks if the try is a failure. Returns false if try is not an instance of scala.Try.

Returns the value from try if it is a Success or throws the exception if it is a Failure.

If an or-else form is provided, it will be evaluated in the event the try is a failure instead of throwing the exception. This can be used to recover from failure or to throw a better error.

Example:

(defn my-div
  [n d]
  (get (scala-try (/ n d))
       (throw (ex-info "Failed division!" {:numerator n :denominator d}))))

(my-div 3 0)
; => clojure.lang.ExceptionInfo: Failed division! {:numerator 3, :denominator 0}

Checks if the try is a success. Returns false if try is not an instance of scala.Try.