How do u remove an entry from a structure

Comments

• Marc Scheibein Posts: 927

  May 16

  In NetLinx, a buffer or array length once defined is always reserved in memory.
  So in your case, the structure array, once defined with a length of 19, has reserved this memory forever.

  volatile _myStruct myStructArray[19] // will have 19 elements of the structure in memory, this is fix reserved

  What you can do is to define how much elements of that array should be "operational" by the string and array operators.

  set_length_array(myStructArray, 17) // the operative length of the array is now 17

  The content of the structure elements 18 and 19 now is still present in memory, but no longer available for any array or string instructions.

  myLengthOfArray = length_array(myStructArray) // the currently operational length is reported 17
  myMemoryLengthOfArray = max_length_array(myStructArray) // reports the length that was created im memory
  
  

  Direct access into the memory cells of array elements 18 and 19 is still possible

  result = myArrayStruct[19].structElementData // reading
  myArrayStruct[19].structElementData = 'hello' // writing
  

  But though writing data into cells of myArrayStruct[19], the length_array() is still 17
  To make them available again for string and array operator, the operative length must be set again to 19

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• johnbonz1 Posts: 28

  May 16

  Thanks, that seems to work. It is a convulated way to remove a array entry. In java all u do is do arry.remove(17) but it seems to work, so thanks again, just need to be aware of how many elements will be added to structure as it is dynamic. so every time I want to add an element I have to do this:

  1) add one to the array length: if prior length was 17, then new length will be 18
  set_length_array(sCalendar_Anniversary, 18);
  2) then set the array structure(18) to new value(s) -- in sTmpCalAnniversary
  sCalendar_Anniversary[18] = sTmpCalAnniversary;

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