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