How to index all but select indices?

Question

I have an array a=rand(100), I want to get every value except the values at the indices notidx=[2;50]. Is there a clean way to get a a

Answer 1

I don't have anything super clean, but you can do

a[setdiff(1:end, notidx)]

which is slightly cleaner than what you had, or

ind = trues(length(a))
ind[notidx] = false
a[ind]

which is pretty verbose but very clear.