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Discussion on: Array Is Not A Linear Data Structure

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iquardt profile image
Iven Marquardt

A linear data structure has a head and a tail and the elements in between have exactly one predecessor and ond successor. This applies to arrays, right? The quality arrays excel in is that you can access them in a non-linear way even though they are linear data structures.

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louy2 profile image
Yufan Lou Author

If you can access the elements in random order, why do you think they have exactly one predecessor and successor? Isn't any element the predecessor and successor of any other element?

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iquardt profile image
Iven Marquardt

..because arrays are indexed data structures and the index says so.

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louy2 profile image
Yufan Lou Author

We need some inevitable structure in the index to describe what we want. But as I demonstrated under "Definition 2", we are free to choose what that structure is. We've agreed on using integer exactly because it is much more powerful than linear, thus convenient for indexing random access.