Issue #6727 has been updated by Eregon (Benoit Daloze). tsion (Scott Olson) wrote: > On top of that, I think #first and #rest make a nice pair, like head and tail from Haskell or any language with cons lists. An Array is not a cons list. #rest is O(n) here, compared to O(1) with cons. So, doing ary[1..-1] or tail is something not very efficient, which you probably do not want most of the time (at least, not in a loop taking one element at a time with #first/#rest). If it is for removing the first items, because for example, the Array is a set of lines and the first is a header, I'm fine with drop(1). @duckinator: Could you show us a real use case for Array#rest ? ---------------------------------------- Feature #6727: Add Array#rest (with implementation) https://bugs.ruby-lang.org/issues/6727#change-28003 Author: duckinator (Nick Markwell) Status: Rejected Priority: Normal Assignee: Category: Target version: =begin I run into many instances where I end up using (({arr[1..-1]})), so I decided to add (({arr.rest})) to make that a bit less hideous. Branch on github: ((<URL:https://github.com/duckinator/ruby/compare/feature/array_rest>)) Patch: ((<URL:https://github.com/duckinator/ruby/compare/feature/array_rest.patch>)) Diff: ((<URL:https://github.com/duckinator/ruby/compare/feature/array_rest.diff>)) =end -- http://bugs.ruby-lang.org/