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Date:         Mon, 19 Oct 1998 11:47:48 -0400
Reply-To:     Douglas Dame <dougdame@HPE.UFL.EDU>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         Douglas Dame <dougdame@HPE.UFL.EDU>
Subject:      Re: macro question
Comments: To: hwang@ZSASSOCIATES.COM
In-Reply-To:  <862566A2.00497CE1.00@zsserver3.zsassociates.com>
Content-Type: text/plain; charset="iso-8859-1"

Hongjie Wang wrote: > > > Dear friends, I have a macro question, do the following two segments of > code equivalent? > > (1). %macro test(datset); > data _null_; > if &datset eq " " then call symput('datset,', '_LAST_'); > run; > ... > ... > > (2). %macro test(datset); > %if %datset eq %str() %then %let datset=_LAST; > ... > ...

So why not do

(3) %macro test(dataset=_LAST_);

That way the macro just defaults to using _LAST_, unless it's invoked with something different specified.

i.e.,

%TEST; ==> uses _LAST_ but %TEST(dataset=PERM.CUSTOMRS); ==> uses PERM.CUSTOMRS

HTH

Douglas Dame Shands HealthCare Gainesville FL ---------------------------------------- "The greatest dangers to liberty lurk in insidious encroachment by men of zeal, well-meaning but without understanding." Judge Louis Brendeis, 1928

(sort of like my SAS coding, in fact.)


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