Date:         Fri, 3 Mar 2000 20:51:31 GMT
Reply-To:     xzhou80@MY-DEJA.COM
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         xzhou80@MY-DEJA.COM
Organization: Deja.com - Before you buy.
Subject:      Re: Strange variable behaviour

Try this one !
I guess the default of length for stuff is $8.

Thanks!
zhou

data data4;
  length stuff $3.;
  if _n_=1 then set data1;
  set data2;
  array search(3) $ a b c;
  do i=1 to 3 until(hit);
    stuff=trim(left(search{i}));
    stuff2="*****"||stuff||"*****";
    hit=index(names,stuff);
  end;

proc print;
run;





In article
<BD12CBAE6A73D211B00300A0C99D6E49011E611D@EXCHANGE5.CSMC.EDU>,
  "Philp, Stephen R." <Stephen.Philp@CSHS.ORG> wrote:
> Okay, I'll admit my array processing is in its infancy, but for the
life of
> me, I can not work this one out in my head.  I would love to know the
why
> behind the works.
> *First set up a little data;
> data data1;
> input a $ b $ c $;
> cards;
> it of ash
> ;
>
> data data2;
>   infile cards truncover;
>   input names $40.;
> cards;
> angelas ashes
> star wars
> let it ride
> ;
> *now do some processing;
> *this construct works and hit gets populated correctly;
> data data3;
>   if _n_=1 then set data1;
>   set data2;
>   array search(3) $ a b c;
>   do i=1 to 3 until(hit);
>      hit=index(names,trim(left(search{i})));
>   end;
> proc print data=data3;
> run;
> *this construct does not work and hit never gets populated;
> data data4;
>   if _n_=1 then set data1;
>   set data2;
>   array search(3) $ a b c;
>   do i=1 to 3 until(hit);
>      stuff=trim(left(search{i}));
>      hit=index(names,stuff);
>   end;
> proc print data=data3;
> run;
>
> I believe that stuff is not inheriting the correct attributes, and
some
> padding with spaces is happening?  But if I left and trim stuff after
just
> assigning it:
> stuff=search{i};
> stuff=trim(left(stuff));
> It still doesn't work.  I suspect a length statement would have
solved this
> but would not be easily facilitated in this piece of code (production
code
> is dynamic).
> Anyone care to pass on some Guru knowledge on this?
> Thanks again,
> Stephen
>


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