I worked on an application that had:

A=INSERT(A,1,-1;NEWVAL:@VM)

and it was tricky. You should develop your own best approach to this concept
of managing manual delimiters.

BTW, is the -1 necessary with A=A[2,LEN(A)-1]. For that matter, could you
use A=A[2,10000000]. My question is if the second value in [] exceeds the
length of A are there any surprising trailing characters? I've used
A=A[2,100000] (or some knowingly high number) with no consequences over the
years.

my 1 cent.
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, February 03, 2004 2:09 AM
Subject: RE: VARIABLE<-1> = '' Inconsistent behaviour


One easy way I sometimes use is to just concatenate a field mark along with
the new value and then remove the first field mark at the end... eg.

A = ""
LOOP
   INPUT B
   A := @FM:B
UNTIL condition
REPEAT
A = A[2,LEN(A)-1]

AdrianW

-----Original Message-----
From: Marco Manyevere [mailto:[EMAIL PROTECTED]
Sent: Tuesday, 3 February 2004 15:00
To: U2 Users Discussion List
Subject: Re: VARIABLE<-1> = '' Inconsistent behaviour


OK the documentation for REPLACE says something about inserting empty
strings. For information flavour it does say the @FM will be added for empty
strings without making a distinction between adding to an empty or non empty
array.

If this is a feature then it implies major code revisions for me whereever I
use the <-1> construct. What would be the shortest/smartest way of adding
strings including non significant nulls? I hate to do:

A = ''
....
....
INPUT B;  * May be empty
IF LEN(B) THEN
   A<-1> = B
END ELSE
   IF LEN(A) THEN
      A<-1> = B
   END ELSE
      A = @FM
   END
END

I have also tested

A<1> = ''
A<2> = ''
A<3> = 3
A<4> = ''
A<5> = 5

and it inserts the @FM as expected but this involves maintaining a counter
for the dynamic array.

Louis Windsor <[EMAIL PROTECTED]> wrote:

I think this is a "feature".

Universe does NOT insert non-significant nulls.  In other words your first
two
(A<-1> = '') do not do anything!  It is consistent in its' behaviour as you
can
count on it to do the above.  It has done this as long as I remember.

I found this out through bitter experience.

Louis


----- Original Message -----
From: Marco  <mailto:[EMAIL PROTECTED]> Manyevere
To: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
Sent: Tuesday, February 03, 2004 12:55 PM
Subject: VARIABLE<-1> = '' Inconsistent behaviour

Hi All,

Consider the program:

A = ''
A<-1> = ''
A<-1> = ''
A<-1> = 3
A<-1> = ''
A<-1> = 4
PRINT A<3>

I expect it output '3' but it outputs '4'. Whats the explanation? I'm on UV
9.6 [NT] running information flavour.

Regards,
Marco




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