On Sun, Nov 8, 2015 at 8:11 PM, andrew cooke <and...@acooke.org> wrote: > I'd like to be able to use take() and all the other iterator tools with a > stream of data backed by an array (or string). > > By that I mean I'd like to be able to do something like: > >> stream = XXX([1,2,3,4,5]) >> collect(take(stream, 3)) > [1,2,3] >> collect(take(stream, 2)) > [4,5] > > Is this possible? I can find heavyweight looking streams for IO, and I can > find lightweight iterables without state. But I can't seem to find the > particular mix described above.
Jeff's conclusion @ JuliaCon is that it seems impossible to implement this (stateful iterator) currently in a generic and performant way so I doubt you will find it in a generic iterator library (that works not only on arrays). A version that works only on Arrays should be simple enough to implement and doesn't sound useful enough to be in an exported API so I guess you probably should just implement your own. Ref https://groups.google.com/forum/?fromgroups=#!searchin/julia-users/iterator/julia-users/t4ZieI2_iwI/3NTw1k406qkJ > > (I think I can see how to write it myself; I'm asking if it already exists - > seems like it should, but I can't find the right words to search for). > > Thanks, > Andrew >
