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

[Peng Yu]

On Sunday, March 6, 2016, Aharon Robbins <address@hidden> wrote:
> 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.
>

Can you provide an example for the above one?

 

>   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


-- 
Regards,
Peng