A new relevant package, not yet registered, is CollectAs.jl. Use it like:
using CollectAs: collect_as
collect_as(Memory, any_iterator)
collect_as(Memory{Float32}, any_iterator)
However collect_as is not just for Memory, it’s basically for any collection type (as long as there’s an implementation). In that way it generalizes collect, which only allows specifying the element type.
The package currently resides on my personal Github namespace, but I hope to be able to move it to JuliaCollections before registering it.
EDIT: it’s still not registered, still in the process, currently it’s named Collects.jl, and there’s a dedicated topic here on the forum: New package: Collects.jl - meant to improve upon and generalize the interface of collect