redsquirrel

(define (cbrt-iter guess x)
  (if (good-enough? guess x)
      guess
      (cbrt-iter (improve guess x)
                 x)))
                 
(define (improve guess x)
  (/ (+ (/ x (* guess guess)) (* 2 guess)) 3))

(define (good-enough? guess x)

redsquirrel

(define (good-enough? guess x)
  (< (abs (- (square guess) x)) 0.001))

;; The good-enough? test used in computing square roots will not be
;; very effective for finding the square roots of very small numbers. Explain.
;;
;; good-enough? is not effective for small numbers because the square
;; of a small number minus the number quickly becomes less than 0.001.

(sqrt 0.00001)

redsquirrel

;; What happens when Alyssa uses new-if is that all of new-if's
;; "arguments" are evaluated and then given to new-if, as opposed
;; to the special form of "if" where the "else" clause is only
;; evaluated if the predicate is false.  Since there is a
;; recursive call in the "else" clause, the call never returns.

redsquirrel

;; SICP 1.5

;; Given:
;;
;;     (define (p) (p))
;;
;;     (define (test x y)
;;       (if (= x 0)
;;           0
;;           y))

redsquirrel

SICP 1.4
Fork me. Solve me.
====

The procedure's 'leading symbol', the thing that is applied to the arguments,
is dynamically determined by an if (aka a ternary expression). Cool, eh?

redsquirrel

SICP 1.3
Fork me. Solve me.
====

(define (square a) (* a a))
(define (sum-of-squares  a b) (+ (square a) (square b)))
(define (square-biggest-two a b c smallest) 
  (cond ((= a smallest) (sum-of-squares b c))
        ((= b smallest) (sum-of-squares a c))
        ((= c smallest) (sum-of-squares a b))

redsquirrel

SICP 1.2
Fork me. Solve me.
====

-71/300 <=
(/ (+ 5 4 (- 2 (- 3 (+ 6 (/ 1 5)))))
  (* 3 (- 6 2) (- 2 7)))

redsquirrel

SICP 1.1
Fork me. Solve me.
====

10 <= 10
12 <= (+ 5 3 4)
8 <= (- 9 1)
3 <= (/ 6 2)
6 <= (+ (* 2 4) (- 4 6))
a <= (define a 3)

redsquirrel

  1) Error:
test_clone_to_users_assigns_promotion_modules_to_new_promotion(PromotionTest):
Errno::ENOENT: No such file or directory - /Users/redsquirrel/Projects/gldl/mimi/repos/trunk/public/system/promotion_images/0000/0001/foo.jpg
    /opt/local/lib/ruby/1.8/ftools.rb:59:in `stat'
    /opt/local/lib/ruby/1.8/ftools.rb:59:in `syscopy'
    /opt/local/lib/ruby/1.8/ftools.rb:89:in `copy'
    /Users/redsquirrel/Projects/gldl/mimi/repos/trunk/app/models/promotion_image.rb:100:in `clone_to_user'
    /Users/redsquirrel/Projects/gldl/mimi/repos/trunk/vendor/rails/activerecord/lib/active_record/associations/association_proxy.rb:177:in `send'
    /Users/redsquirrel/Projects/gldl/mimi/repos/trunk/vendor/rails/activerecord/lib/active_record/associations/association_proxy.rb:177:in `method_missing'
    /Users/redsquirrel/Projects/gldl/mimi/repos/trunk/app/models/promotion.rb:384:in `replace_images_with_new_ones'

redsquirrel

DROP PROCEDURE IF EXISTS mailing_prevent_resend;

DELIMITER //

CREATE PROCEDURE mailing_prevent_resend
(target_mailing_id INT, all_audience_user_id INT, prevent_resend BOOLEAN, target_promotion_id INT, force_reconfirm BOOLEAN)

BEGIN

DROP TEMPORARY TABLE IF EXISTS resulting;