- ideque-find-right pred ideque #!optional failureprocedure
Returns the first/last element of ideque that satisfies pred. If there is no such element, returns the result of invoking the thunk failure; the default thunk is (lambda () #f).
Returns the first/last element of ideque that satisfies pred. If there is no such element, returns the result of invoking the thunk failure; the default thunk is (lambda () #f).