walter@vlsivie.tuwien.ac.at (03/09/91)
Does anybbody know how to construct a function
"list->string" for MIT Scheme vers 7.0 ?
It should work as follows:
(list->string '((a 1) (b 2)))
=> "((a 1) (b 2))"
I can find many conversion functions like
number->string, symbol->string etc. but
can't use that for my trivial seeming function.
I would appreciate any comments to that problem
walt
Walter Eder
Dept. of VLSI-Design, University Vienna, Austria
Email: walter@vlsivie.tuwien.ac.at
arthur@altdorf.ai.mit.EDU ("Arthur Gleckler") (03/11/91)
Date: 9 Mar 91 09:38:51 GMT
From: walter@vlsivie.tuwien.ac.at
Organization: Vienna University of Technology, Dept. of VLSI-Design
Newsgroups: comp.lang.scheme.c
Sender: info-cscheme-request@altdorf.ai.mit.edu
Does anybbody know how to construct a function
"list->string" for MIT Scheme vers 7.0 ?
It should work as follows:
(list->string '((a 1) (b 2)))
=> "((a 1) (b 2))"
I can find many conversion functions like
number->string, symbol->string etc. but
can't use that for my trivial seeming function.
I would appreciate any comments to that problem
walt
Walter Eder
Dept. of VLSI-Design, University Vienna, Austria
Email: walter@vlsivie.tuwien.ac.at
The procedure WITH-OUTPUT-TO-STRING is good for this type of problem.
Given a a procedure of no arguments (a "thunk"), it invokes the thunk,
capturing all its output in a string. This string is returned as the
value of the call to WITH-OUTPUT-TO-STRING:
(with-output-to-string
(lambda ()
(display '((a 1) (b 2)))))
;Value 1: "((a 1) (b 2))"markf@altdorf.ai.mit.EDU (03/11/91)
>> >> Does anybbody know how to construct a function >> "list->string" for MIT Scheme vers 7.0 ? >> It should work as follows: >> >> (list->string '((a 1) (b 2))) >> => "((a 1) (b 2))" >> >> I can find many conversion functions like >> number->string, symbol->string etc. but >> can't use that for my trivial seeming function. (write-to-string '((a 1) (b 2))) ;Value "((a 1) (b 2))" -Mark