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WEIRD !!!
ime, on PI, that particular sequence would have given three
attributes.
The only time " A<-1> = '' " should have no effect is
when A == '' initially.
Cheers,
Wol
Sorry for jumping in without checking my facts
first.
You are right the sequence
A = 'abc'
A<-1> = ''
A<-1> = 'def'
results in A having TWO attributes NOT three. The second
statement has no effect. This is as it
works on Windows XP Prof
and the Personnel version of UniVerse. If
my memory serves me
this is also how it works on UV9.6 on Unix
(HPUX). Again I think
the statement A<-1>='' is always ineffective. UV without over-
riding options etc will never insert a null at
the end of a string variable.
My experience is mainly with Pick
flavour.
Louis
----- Original Message -----
Sent: Tuesday, February 03, 2004 5:34
PM
Subject: Re: [UV] VARIABLE<-1> = ""
and Basic Compile "$OPTIONS EXTRA.DELIM"work "consistently"
The same documentation goes on to say:
In INFORMATION and IN2 flavor accounts, if _expression_ is an empty string
and the new element is appended to the end of the dynamic array,
the end of
a field, or the end of a value, a delimiter is appended to the
dynamic array,
field, or value. Use the -EXTRA.DELIM option of the
$OPTIONS statement
to make the REPLACE function work as it does in IDEAL, PICK,
and
REALITY flavor accounts.
In my opinion this behaviour is still unexpected and here
is why I say so:
If Information behaves the same as PICK as you say, then the
behaviour is still contrary to documentation because in the example I gave
below, a @FM was still appended even if the string to be added was empty: i.e.
A = 'abc'
A<-1> = ''
A<-1> = 'def'
will result in 3 fields. According to the REPLACE extract
you quoted, A<-1> = '' should not add a field mark regardless of
whether A is empty or not for PICK flavour.
Marco
Marco,
As
some previous replies were saying, the behaviour you describe is
normal
and documented. The explanation for this is found in the "REPLACE"
Basic
function, which is the equivalent for the angle brackets notation
at the
left of an assignment operator ("=") for dynamic arrays
handling.
For more information, please refer to the Basic documentation
manual (File
"BASIC.pdf" in the CDROM library)
Here is an excerpt
of the documentation :
----
REPLACE function
Syntax
REPLACE
(_expression_, field#, value#, subvalue# { , | ; } replacement)
REPLACE
(_expression_ [ ,field# [ ,value#] ] ; replacement)
variable < field# [
,value# [ ,subvalue#] ] >
.../...
In IDEAL, PICK, PIOPEN, and REALITY flavor accounts, if replacement is an
empty string and an attempt
is made to append the new element to the end
of the dynamic ar ray, field, or value, the dynamic array, field, or value
is left
unchanged;
additional delimiters are not appended. Use the EXTRA.DELIM
option of the
$OPTIONS statement to make the REPLACE function append
a delimiter to the
dynamic array, field, or value.
.../...
----
The fact is that
"UniVerse" is mainly designed to reproduce the behaviour
of legacy products in the "Pick" family. In this case, the implementation
of the
"INFORMATION" and "IDEAL" flavour followed the default behaviour
in
"Pick" native products.
I hope this answered your
question.
Regards,
Hervé BALESTRIERI
Support Technique
Avancé - IBM Data Management - Produits "U2"
----- Forwarded by Herve
Balestrieri/France/IBM on 03/02/2004 09:35 -----
Marco Manyevere
<[EMAIL PROTECTED]
.com> cc:
Sent by:
Subject: VARIABLE<-1> = '' Inconsistent behaviour
u2-users-bounces@
oliver.com
03/02 /2004 05:55
Please respond to
U2 Users
Discussion List
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
BT Yahoo! Broadband - Free modem offer, sign up online today and save
£80
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