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Help with string append added by sepuku on Tue May 1 13:49:12 2012

; A dummy file-exists?

(define my-file-exists?
  (lambda (file)
    (let ((command
           (string-append "test -e" "file")))
           (system command))))
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Given a list, which one-argument R5RS procedure returns the element at index 0?
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