User blog comment:Vel!/Ellipsis considered harmful/@comment-27394924-20170605172751/@comment-27516045-20170605181649

I agree, so long as it's well defined.

And this doesn't work all the time. How would you express the following without an ellipsis?

a[0{1}1]b = a[0,...,0,1]a (with b 0's)