In <[EMAIL PROTECTED]>, on
11/04/2008
at 11:40 AM, Itschak Mugzach <[EMAIL PROTECTED]> said:
>Look at this:
>A='**'
>Say Value(A)
REXX is not CLIST. An unquoted token that is not a keyword or lite4ral is
treated as a variable name. If you want to look up the value of A, use
value('A'); the code you give is asking for the value of **.
How can I stop REXX from interprate variable A?
Wrong question; you need to prevent REXX from treating the string A as a
variable. You do the by quoting it: 'A' or "A".
>CLIST has this function, BTW.
CLIST has the opposite problem; it swallows ampersands and apostrophes,
and you have to go through contortions to tell it that ' means ' and &
means &. With REXX there's no need for, e.g., STR().
In <[EMAIL PROTECTED]>, on
11/04/2008
at 12:29 PM, Itschak Mugzach <[EMAIL PROTECTED]> said:
>I read a record from a dataset. A field named A holds the string value of
>'ABCD**'. I then pass the name of the variable to a routine.
REXX doesn't have call by name; you need to pass an expression whose value
is the variable name, e.g. 'A'.
>The routine resolved the value by name using VALUE(A).
That asks REXX to return the variable whose name is the value of A; if you
want the value of A, then you must pass the name of A, e.g., VALUE('A').
>In Clist, you can limit the number of
>levels it will interprate the variable.
In REXX it is automatically limited to one level. You use value() when one
level isn't enough.
>I want REXX to return value by name
In REXX everything is a string. If you want to pass the name of A, use 'A'
or "A".
>without trying to resolve it and reference it like a string variable.
Then pass a literal and REXX will treat it as a literal.
See my Safe REXX article at REXLA.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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