Re: [bug-gawk] Can a key in a array be deleted while the array is iterated?

[Andrew J. Schorr]

On Tue, Jan 03, 2017 at 03:56:16PM +0100, Manuel Collado wrote:
> Well, it seems safe to modify the current iterated array element. But
> modifying array elements other then the current one may be troublesome.
> 
> In this particular case, the original code could be modified by iterating
> over the second (unchanged) array instead of the first (been modified) one.
> As follows:
> 
> function arrkeyintersect(x1, x2,    k) {
>     for(k in x2) {
>         delete x1[k]
>         }
>     }
> }

It's not clear to me. Can you please elaborate on why this code is dangerous?

Thanks,
Andy