http://qs1969.pair.com?node_id=1007690


in reply to Idiom to return 0 or random number of array elements

just include the possibility of @array[0..-1] which returns an empty list.

try something like: @array[0 .. (int rand (@array+1)) -1]

  DB<130>  @array=a..c
 => ("a", "b", "c")
 
  DB<131> @array[0 .. -1 + int rand 1+ @array]
 => ()
  
  DB<132> @array[0 .. -1 + int rand 1+ @array]
 => ("a", "b")
 
  DB<133> @array[0 .. -1 + int rand 1+ @array]
 => ("a")
 
  DB<134> @array[0 .. -1 + int rand 1+ @array]
 => ("a", "b", "c")
 
  DB<135> @array[0 .. -1 + int rand 1+ @array]
 => ("a", "b")

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Cheers Rolf

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