[vector] #21: Add another form of unfoldr

[vector]

#21: Add another form of unfoldr
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Reporter:  Khudyakov    |        Owner:        
    Type:  enhancement  |       Status:  closed
Priority:  major        |    Milestone:  0.8   
 Version:  0.7          |   Resolution:  fixed 
Keywords:               |  
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Changes (by rl):

  * status:  new => closed
  * resolution:  => fixed


Comment:

 Actually, since `unfoldrN` is inlined, there should be no performance
 difference between `unfoldrN n . Just` and `unfoldrN2 n` so I don't think
 it's necessary to add the latter. Please shout if you think otherwise!

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Ticket URL: <http://trac.haskell.org/vector/ticket/21#comment:8>
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