Knowing where you are: custom array indices in Julia

I really like how Julia handles arrays.

I remember being really intrigued when I ran into Fortran programs that used negative array indices. It's pretty handy in a lot of situations.

Interesting. It would be nice to surface this approach as a simple spreadsheet app so people could develop an intuitive feel for the concept.

This is very interesting to me but not really revolutionary since I am so used to languages like javascript where array indices don&#x27;t matter the same way they do in C. However, I do see the utility in being able to generate new &quot;views&quot; of an existing array by offsetting all indices by a set amount.<p>First thing that comes to mind is time-series data - like a sliding window based on some concept of &quot;now&quot; where indices can be offset by the current date&#x2F;time. (e.g. timeSeries[0] == now, timeSeries[-1] == one second ago, timeSeries[1] == one second in the future, etc.)<p>I actually find these linear-algebra based languages even more mind-bending than functional based languages.

This is possible in ruby too, probably in a lot of languages.<p>I&#x27;ve rewritten someobject#[] plenty of times to have cleaner code.