I have been looking at a bit of scheme in my free time. Not strangely, most of the code I seem to write seems to be very C like.

(define rev1 (lambda (ls)

        (let loop ((res ()) (ls ls))

                (if (null? ls) res

                        (begin

                                (set! res (cons (car ls) res))

                                (loop res (cdr ls)))))))

(define rev2 (lambda (ls)

        (let loop ((left ls)(right ())(temp ()))

                (cond ((null? left) right)

                        (else

                                (set! temp (cdr left))

                                (set-cdr! left right)

                                (loop temp left ()))))))

(print (rev2 '(1 2 3 4 5)))

I understand that learning the language is very different from learning to program with it. For now I am learning the language from Dorai Sitaram’s “Teach Yourself Scheme in Fixnum Days”

Annie’s song is playing right now.

The sky looks gray now, like the color of old memory.

Annie's Song

You fill up my senses

Like a night in a forest

Like the mountains in springtime

Like a walk in the rain

Like a storm in the desert

Like a sleepy blue ocean

You fill up my senses

Come fill me again

Come let me love you

Let me give my life to you

Let me drown in your laughter

Let me die in your arms

Let me lay down beside you

Let me always be with you

Come let me love you

Come love me again

You fill up my senses

Like a night in a forest

Like the mountains in springtime

Like a walk in the rain

Like a storm in the desert

Like a sleepy blue ocean

You fill up my senses

Come fill me again

John Denver