ryanbriones

#!/usr/bin/ruby
#-*-ruby-*-
# A script to run ctags on all .rb files in a project. Can be run on
# the current dir, called from a git callback, or install itself as a
# git post-merge and post-commit callback.

CTAGS = '/opt/local/bin/ctags'
HOOKS = %w{ post-merge post-commit post-checkout }
HOOKS_DIR = '.git/hooks'

ryanbriones

1) Put terminal_clone_tab.sh somewhere in 
   your path and make sure it is executable
     chmod u+x terminal_clone_tab.sh
2) Then add the following alias (~/.bash_profile or something)
     alias nt='terminal_clone_tab.sh'
3) Then you can hit nt (for new tab) anywhere
   and a new tab will open up in same directory.

If there is an easier way to do this, let me know nunemaker@gmail.com.

ryanbriones

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

;; I wasn't completely clear on the point of this exercise
;; so I tried doing them in my head before running them in the repl

10 ;; => 10
(+ 5 3 4) ;; => 12
(- 9 1) ;; => 8

ryanbriones

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

(/ (+ 5 4 (- 2 (- 3 (+ 6 (/ 4 5)))))
   (* 3 (- 6 2) (- 2 7)))

;; => -37/150

ryanbriones

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

(define (square x) (* x x))

(define (sum-of-squares a b) (+ (square a) (square b)))

(define (sum-two-largest-squares a b c)
  (cond ((and (< a b) (< a c))

ryanbriones

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

(define (a-plus-abs-b a b)
  ((if (> b 0) + -) a b))

(a-plus-abs-b 1 2)
;; ((if (> 2 0) + -) 1 2)
;; (+ 1 2)

ryanbriones

;; SICP 1.5

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

ryanbriones

;; SICP 1.6
;; Fork me. Solve me.

;; if is a special form that only evaluates the arguments after the predicate has been evaluated.
;; since new-if evaluates it's arguments immediately, the program is sent into an infinite loop
;; evaluating sqrt-iter with an improved guess

ryanbriones

;; SICP 1.8
;; Fork me. Solve me.

(define (cube x) (* x x x))

(define (improve y x)
  (/ (+ (/ x (* y y)) (* 2 y)) 3))

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

ryanbriones

# getting more power out of Enumerable
# this is to convert an RGB data structure, into RGBA

RGB_WIDTH = 3

raw_data = [1,1,1,2,2,2,3,3,3,4,4,4]

# returns an enumerable object with the raw data split up into chunks of 3
pixels = raw_data.enum_slice( RGB_WIDTH )