Re: seeking golfing advice

[Steve Fink]

On Thu, May 17, 2012 at 3:14 AM, Aristotle Pagaltzis pagalt...@gmx.de wrote:
 * Mike Erickson m...@quidquam.com [2012-05-16 15:45]:
 If you don't care about order, but just want those elements, you can
 also do:

 keys%{{@a}}

 There is more than order that gets lost. If you use `keys` you also get
 everything back stringified – undefs are lost and references break. If
 you use `values` these problems go away… except that to get the odd-
 index elements from it you have to `reverse` the array, at which point
 a not-especially-golfed grep is shorter.

So you'd want

  values%{{1,@a}}

then

Re: seeking golfing advice

[Aristotle Pagaltzis]

* Steve Fink sph...@gmail.com [2012-05-18 10:25]:
 On Thu, May 17, 2012 at 3:14 AM, Aristotle Pagaltzis pagalt...@gmx.de wrote:
  * Mike Erickson m...@quidquam.com [2012-05-16 15:45]:
   If you don't care about order, but just want those elements, you
   can also do:
  
   keys%{{@a}}
 
  There is more than order that gets lost. If you use `keys` you also
  get everything back stringified – undefs are lost and references
  break. If you use `values` these problems go away… except that to
  get the odd-index elements from it you have to `reverse` the array,
  at which point a not-especially-golfed grep is shorter.

 So you'd want

  values%{{1,@a}}

 then

D’oh!

Re: seeking golfing advice

[John Douglas Porter]

 From: Aristotle Pagaltzis pagalt...@gmx.de
 Subject: Re: seeking golfing advice
 To: fwp@perl.org
 Date: Friday, May 18, 2012, 5:29 AM
 * Steve Fink sph...@gmail.com
 [2012-05-18 10:25]:
  On Thu, May 17, 2012 at 3:14 AM, Aristotle Pagaltzis
 pagalt...@gmx.de
 wrote:
   * Mike Erickson m...@quidquam.com
 [2012-05-16 15:45]:
If you don't care about order, but just want
 those elements, you
can also do:
   
keys%{{@a}}
  
   There is more than order that gets lost. If you
 use `keys` you also
   get everything back stringified – undefs are
 lost and references
   break. If you use `values` these problems go
 away… except that to
   get the odd-index elements from it you have to
 `reverse` the array,
   at which point a not-especially-golfed grep is
 shorter.
 
  So you'd want
 
   values%{{1,@a}}
 
  then
 
 D’oh!


D::oh is right.  You get an unwanted extra undef at the end of such list.