Paulo Cordeiro

// throw NullPointerException if ar is null int simpleArraySum(int[] ar) { return Arrays.stream(ar).reduce(0, Integer::sum); }

> > ``` > > // throw NullPointerException if ar is null > > int simpleArraySum(int[] ar) { > > return Arrays.stream(ar).reduce(0, Integer::sum); > > } > > ``` >...