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#
msgid ""
msgstr ""
msgid "title: Debit Reading Session - SICP solutions pt.1"
msgstr ""
msgid "date: 2021-06-08"
msgstr ""
msgid "layout: post"
msgstr ""
msgid "lang: en"
msgstr ""
msgid "ref: debit-reading-session-sicp-solutions-pt-1"
msgstr ""
msgid ""
";; 1.41\n"
"(define (double f)\n"
" (lambda (x)\n"
" (f (f x))))\n"
"\n"
"\n"
":;; 1.42\n"
"(define (compose f g)\n"
" (lambda (x)\n"
" (f (g x))))\n"
"\n"
"\n"
";;; 1.43\n"
"(define (repeated f n)\n"
" (if (= 1 n)\n"
" identity\n"
" (comp (repeated f (dec n)))))\n"
"\n"
"\n"
";;; 2.27\n"
"(define (map-tree node-fn leaf-fn tree)\n"
" (cond\n"
" ((null? tree) tree)\n"
" ((not (pair? tree)) (leaf-fn tree))\n"
" (else\n"
" (node-fn\n"
" (cons (map-tree node-fn leaf-fn (car tree))\n"
" (map-tree node-fn leaf-fn (cdr tree)))))))\n"
"\n"
"(define (map-nodes f tree)\n"
" (map-tree f identity tree))\n"
"\n"
"(define (deep-reverse x)\n"
" (map-nodes reverse x))\n"
"\n"
"\n"
";;; 2.28\n"
"(define (flatten tree)\n"
" (define (rec acc t)\n"
" (cond\n"
" ((null? t) acc)\n"
" ((not (pair? t)) (cons t acc))\n"
" (else\n"
" (rec (rec (cdr t) acc)\n"
" (car t)))))\n"
" (rec nil tree))\n"
"\n"
"\n"
";;; 2.30\n"
"(define (square-tree tree)\n"
" (map-leaves square tree))\n"
"\n"
"\n"
";;; 2.31\n"
"(define square-tree map-leaves) ; ha!\n"
"\n"
"\n"
";;; 2.32\n"
"TODO\n"
msgstr ""
msgid "FYI: I just typed those in, I didn't yet test them yet."
msgstr ""
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