why $ is need to access array [negative index]?

IGotD- nise at nise.com
Fri Sep 18 21:31:53 UTC 2020

On Friday, 18 September 2020 at 20:46:00 UTC, mw wrote:
> Currently we have range check on every single indexing 
> operation already; so the trade-off here is: adding one more 
> check v.s. the convenience it buys.

We want as few range checks as possible because indexing arrays 
are not too seldom done it loops. Adding an extra check could 
affect performance in this case.

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