Wikipedia does not list insertion complexity for arrays in the list of linked-list implementations.

Is this because insertion operations are not defined on the array ADT?

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    $\begingroup$ Please ask only one question per post. I removed the second one (note that it's still available here); please repost on its own -- if it's not already been answered here, here or here. $\endgroup$ – Raphael May 25 '16 at 9:20
  • $\begingroup$ @Raphael - sorry, but your revisions to my question were too heavy-handed IMO. $\endgroup$ – 52d6c6af May 25 '16 at 9:34
  • $\begingroup$ The linked article contains specific values for insertion/deletion complexity in both dynamic and fixed-size arrays. $\endgroup$ – Rick Decker May 25 '16 at 14:58

The array is a fixed-size data structure, and insertions would change its size. Thus they are impossible, which is why Wikipedia says "N/A" for the insertion complexity.

A dynamic array can have its size changed, which is why complexities are given in that column.

  • $\begingroup$ "The array is a fixed-size data structure" - should this be ADT? $\endgroup$ – 52d6c6af May 25 '16 at 16:47

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