Let's say you had a file "a.data" that contained
("This" "is" "a" "test")
Note that there is no initial quote.
One way would be
(display (read (open-input-file "a.data")))
but this doesn't explicity close the file "a.data" right after the call, which
might be an issue if you are opening a lot of files.
One step up could be
(call-with-input-file "a.data" (lambda (p) (display (read p))))
This will explicity close the file after it is read.
Note that this specifically reads exactly one s-expression from the top of the
file, as you requested. It might be simpler to have an "a.data" that contained
a bunch of (define) statements, like so
(define a '("This" "is" "a" "test"))
Then you could (load "a.data") that file, and the defined variables would be
available.
Hope this helps,
Mike Gran
----- Original Message ----
From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
To: guile-user@gnu.org
Sent: Saturday, October 21, 2006 11:48:04 PM
Subject: newbie: read, load and eval
This seems like the simplest thing which guile ought to be able to do
in a snap, but I can't for the life of me work out how to do it.
I have a file called a.data which contains some data as a scheme
expression, such as
'("This" "is" "a" "test")
and I want to use these data in a program, so I want to write a line
like
(display (load "a.data"))
but it doesn't work; nor does
(with-input-from-file "a.data" (lambda () (display (read))))
What is the way to do this?
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