true echo '
'; echo isContinuousSequence([10, 11, 12, 14, 15]); // => false echo '
'; echo isContinuousSequence([]); // => false echo '
'; echo isContinuousSequence([0, 1, 2, 3]); // => true echo '
'; echo isContinuousSequence([-5, -4, -3]); // => true echo '
'; echo isContinuousSequence([10, 11, 12, 13]); // => true echo '
'; echo isContinuousSequence([10, 11, 12, 14, 15]); // => false