Using generalized array indexes

question

#1

After reading through the PR below, and some blog posts about generalized indexing in AbstractArrays, I am wondering if the code below is the right way to iterate through the rows of a matrix:

"Check if argument is a probability vector."
isprobvec{T}(v::AbstractVector{T}) = all(x->x ≥ 0, v) && sum(v) ≈ one(T)

"Check if argument is a probability (stochastic) matrix."
isprobmat(m::AbstractMatrix) = all(i->isprobvec(view(m, i, :)), indices(m, 1))