MATLAB: Summing few sequences in a vector

Question

How can I sum few sequences in a vector? For example, if I have the vector:

A = [1 1 0 4 1 1 0 2 1 1 1]

I want to get the vector:

B = [2 6 5]

Which is the sum of sequences separated by zero.

Of curse I wand to do it without any for/while loops.

Thank you.

Answer 1

t1 = cumsum(A);
B = diff([0,t1(A==0),B(end)]);