On May 26, 2012, at 10:32 AM, Don Green wrote:
> (with-output-to-file file
> #:exists 'replace
> (lambda ()
> (for ((ch content)) (display ch)))) ;<<<<<<<<<<<<<<<<<<what is ch?
Like all languages, Racket for loops specify a variable _ch_ that run over some
compound data structure, in this case the string in _content_ .
> ;; --- test
> (check-equal? (with-output-to-string
> (lambda ()
> (for ((ln (answer file)))
> (displayln (string-join ln))))) ;<<<<<procedure
> string-join: expects 2 arguments, given 1: '("Do" "you" "think" "it" "is"
> "long" "enough?")
> expected)
I assume you're running a version of DrRacket that's a bit behind. Add " " as
the second argument.
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