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7593 :: How to make an object mutable in recursion?

• jasonfi (orginal) [2021-03-09T07:15:49+01:00] view original

  An example:

  MyExample = object
    field: name
    my_examples: seq[MyExample]
  
  proc updateMyExample(old_name: string,
                       new_name: string,
                       my_example: var MyExample) =
    
    if my_example.field == old_name:
      my_example.field = new_name
    
    for my_example_i in my_example.my_examples:
      updateMyExample(old_name,
                      new_name,
                      my_example_i)
  Run

  What I found is that the field remains unchanged after the call to updateMyExample(). The for loop seems to remove mutability.

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• xigoi (orginal) [2021-03-09T07:24:46+01:00] view original

  for my_example_i in my_example.my_examples.mitems:

  Run

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• jasonfi (orginal) [2021-03-09T07:54:52+01:00] view original

  Thanks, that worked.

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