[StefanKarpinski]

And Fortran, where it works fine. Perl lets you change the array index offset but everyone warns you that your computer will reach out and slap you in the face if you do. As is often the case, the devil is in the details.

[Avshalom]

In perl is it APL style where it changes the index for the entire world (until changed again) or is it Fortran/Pascal style where you are expected to declare the lowest/highest index per array?

[PeCaN]

APL-style with a global index origin ($[ in Perl, à la ⎕IO in most APLs).