Elegant way of exclusive indexing

General Usage
,
16

These are my takes:

Preserving the original array:

julia> function f(x,inds)
           y = Vector{eltype(x)}(undef,length(x) - length(inds))
           j = 0
           for i in Iterators.filter(!in(inds),eachindex(x))
               j += 1
               @inbounds y[j] = x[i]
           end
           return y
       end
f (generic function with 1 method)

julia> x = collect(1:10); inds = [3,5,6];

julia> @btime f($x,$inds)
  72.919 ns (1 allocation: 112 bytes)
7-element Vector{Int64}:
  1
  2
  4
  7
  8
  9
 10

Modifying the original array:

julia> function f!(x,inds)
           for i in Iterators.reverse(Iterators.filter(in(inds),eachindex(x)))
               deleteat!(x,i)
           end
           return x
       end
f! (generic function with 1 method)

julia> @btime f!(x,$inds) setup=(x=copy($x)) evals=1
  121.000 ns (0 allocations: 0 bytes)
7-element Vector{Int64}:
  1
  2
  4
  7
  8
  9
 10