1.10 Working with Files and Directories: dir.ss

The teachpack provides structures and operations for working with files and directories:

(struct   dir   (name dirs files))

name : string?

dirs : (list-of dir?)

files : (list-of file?)

(struct   file   (name content))

name : string?

content : (list-of char?)

(create-dir path) → dir?

path : string?

Turns the directory found at path on your computer into an instance of dir?.

Sample: Set teachpack to <code>dir.ss</code> and click RUN:

> (create-dir ".")

(make-dir

'|.|

empty

(cons (make-file 'ball1.gif 1289 empty)

(cons (make-file 'blueball.gif 205 empty)

(cons (make-file 'greenbal.gif 204 empty)

(cons (make-file 'redball.gif 203 empty)

(cons (make-file 'ufo.gif 1044 empty)

(cons (make-file 'gif-test.ss 5811 empty)

empty)))))))

Using “.” usually means the directory in which your program is located. In this case, the directory contains no sub-directories and six files.

Note: Softlinks are always treated as if they were empty files.