Re: [bug-gawk] Is there a way to assign to a hash via the -v option

[Aharon Robbins]

Hi.

As noted, there is no way to directly assign to an array element using -v.
This isn't going to change, since the general case would require being
able to parse any arbitrary expression as the subscript.

David's suggestion is one option. Another is simply to mix the -e and -f
command line options and do the assignment in a BEGIN rule suppplied
on the command line.  Shell quoting tricks can be used if you need to
assign a dynamically computed value.

Arnold

> Date: Fri, 4 Mar 2016 15:22:33 -0700
> From: david kerns <address@hidden>
> To: Peng Yu <address@hidden>
> Cc: address@hidden
> Subject: Re: [bug-gawk] Is there a way to assign to a hash via the -v option
>
> how about this:
>
> awk -v l="10,20" 'BEGIN{split(l,x,","); print x[1]; print x[2]}'
>
> On Fri, Mar 4, 2016 at 1:56 PM, Peng Yu <address@hidden> wrote:
>
> > Hi, I want to assign to a hash via the -v option. But the following
> > does work. Is there anyway I can do it with -v?
> >
> > $ awk -v "x[1]=10" -v "x[2]=20" 'BEGIN{print x[1]; print x[2]}'
> > awk: fatal: `x[1]' is not a legal variable name
> >
> > --
> > Regards,
> > Peng