Re: CSV extension status

[Manuel Collado]

El 19/05/2021 a las 15:44, Andrew J. Schorr escribió:
> On Wed, May 19, 2021 at 09:03:36AM -0400, Andrew J. Schorr wrote:
> >          _csv_nf = csvsplit($0, _csv_ff)
> >          _csv_record = ""
> >          _csv_sep = ""
> >          for (k=1; k in _csv_ff; k++) {
> >              _csv_record = _csv_record _csv_sep csvunquote(_csv_ff[k])
> >              _csv_sep = OFS
> >          }
> >          $0 = _csv_record
>
> Why is this written as:
>
>         for (k=1; k in _csv_ff; k++) {
>
> instead of:
>
>         for (k=1; k <= _csv_nf; k++) {
>
> Unless I'm confused, the latter ought to be faster (simple arithmetic
> comparison instead of a hash lookup).

Right. It is a matter of style. The former can be used when the number 
of elements is not explicitly stated. Well, it would suffice to call 
length(array). Not available in older awks.

Regards.
--
Manuel Collado - http://mcollado.z15.es