6 lines
225 B
Common Lisp
6 lines
225 B
Common Lisp
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(with-open-file (in #p"input.txt" :direction :input)
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(with-open-file (out #p"output.txt" :direction :output)
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(loop for line = (read-line in nil 'foo)
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until (eq line 'foo)
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do (write-line line out))))
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