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Tail {:  _

{: selects the last item of its argument.
 		     

   ]y=: a.{~ (a.i.'A') + i.4 5
ABCDE
FGHIJ
KLMNO
PQRST

   f=: }: ; {:
   f y
+-----+-----+
|ABCDE|PQRST|
|FGHIJ|     |
|KLMNO|     |
+-----+-----+

   g=: }: ,.@; {:
   g y
+-----+
|ABCDE|
|FGHIJ|
|KLMNO|
+-----+
|PQRST|
+-----+

   h=: {. ,.@; }.
   h y
+-----+
|ABCDE|
+-----+
|FGHIJ|
|KLMNO|
|PQRST|
+-----+

   {:"1 y
EJOT


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