Problem 1505. Perl 4: unshift

This is part of a series of perl function which were very helpful for many perl programmers. Could you implement it in Matlab?

Prepends list to the front of the array, and returns the number of elements in the new array. The output vector should be of the same type (column or row array) as the input vector x regardless of the list append type. Example:

x=[1 2 3 4 5]
[x,num]=unshift(x, [6 7 8])

then

x=[6 7 8 1 2 3 4 5]
num=8