[GHC] #10084: Data.List should have a takeLastN function

[GHC]

#10084: Data.List should have a takeLastN function
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        Reporter:  leonbaum2         |                   Owner:
            Type:  feature request   |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  libraries/base    |                 Version:  7.8.4
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by nomeata):

 Heh, nice to see my blog cited here :-)

 One could argue that obviously, when you do `takeLastN` on a list, you are
 using the wrong data structure. But we also have `last` and `isSuffixOf`
 in `Data.List`, and maybe leaving it out for that reason is too much
 patronizing...

 In general, I’m in favor of adding that function.

 Did you have a real, practical need for the function, or are you bringing
 this up for other reasons?

 If you want this to become real, I suggest you follow the process in
 https://wiki.haskell.org/Library_submissions, i.e. send your proposal to
 the libraries mailing list.

 Possible issues to consider in the proposal and following discussion:
  * What is a good name for this?
  * If we have `takeLastN`, do we need `dropLastN`? How would that be
 implemented?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10084#comment:1>
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