*reifying. Deifying environments might not be the best idea.
On Wednesday, July 8, 2015 at 3:34:53 PM UTC-4, Brandon Taylor wrote: > > I was aware of those packages (though I hadn't read the discussions > referenced). Macros are great but they are incredibly difficult to reason > with concerning issues of scope (at least for me). Deifying environments > could solve all of these issues (and so much more) in one fell swoop. > > On Wednesday, July 8, 2015 at 3:20:00 PM UTC-4, David Gold wrote: >> >> Some of these issues have been thought about fairly extensively by the >> stats community in particular, precisely on account of the use cases you >> cite: >> >> https://github.com/JuliaStats/DataFrames.jl/pull/472 >> https://github.com/JuliaStats/DataFrames.jl/issues/504 >> <https://www.google.com/url?q=https%3A%2F%2Fgithub.com%2FJuliaStats%2FDataFrames.jl%2Fissues%2F504&sa=D&sntz=1&usg=AFQjCNHgUEZP8TyJ_BuUyyFA5SIxneOJTA> >> >> I think that the matter is still very much an open question. I have no >> sense that anything is going to be added to Base Julia itself. Currently, >> the best way (that I know of, anyway) to achieve the delayed evaluation >> effect is via the use of macros. See for instance: >> >> https://github.com/JuliaStats/DataFramesMeta.jl >> https://github.com/one-more-minute/Lazy.jl >> >> I'm hope somebody else will be able to pop in an give a more thorough >> answer, but the above may at least be a place to start. >> >> On Wednesday, July 8, 2015 at 2:03:45 PM UTC-4, Brandon Taylor wrote: >>> >>> Hadley Wickham's lazyeval package in R is pretty cool in that you can >>> attach an environment to an expression, pass it in and out of functions >>> with various modifications, and then evaluate the expression within the >>> original environment (or any other environment that you choose). R in >>> general has the functions like list2env and list(environment()) that allow >>> one to convert an environment into a list and back again (list being the R >>> equivalent of a Dict). Are there any plans to add these kind of features to >>> Julia? >>> >>
