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1848 :: How do you pass in an array to a function without specifying length?

• enjoysmath (orginal) [2015-12-06T08:29:25+01:00] view original

  Nim says array[] expects two type paremters usually meaning the 0..n and the type. How can this be?

  What do I do?

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• bluenote (orginal) [2015-12-06T09:24:44+01:00] view original

  I guess you actually want a seq? Arrays have a fixed size at compile time, which is why the size is a type parameter. In contrast, seqs are dynamic. Alternatively, you could use a generic proc.

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• Arrrrrrrrr (orginal) [2015-12-06T09:57:45+01:00] view original

  'Nim By Example' has a chapter for seqs: http://nim-by-example.github.io/seqs/

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• jyapayne (orginal) [2015-12-06T17:09:55+01:00] view original

  You can use the openarray specifier for procs.

  proc doSomething(arr: openArray[int])=
    for x in arr:
      echo x
  
  var
    myArr: array[4, int] = [1,2,3,4]
    mySeq: seq[int] = @[5,6,7,8]
  
  doSomething(myArr)
  doSomething(mySeq)
  
  # Outputs:
  #  1
  #  2
  #  3
  #  4
  #  5
  #  6
  #  7
  #  8
  Run

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