vdeemann

#lang racket
(require racket/trace)

(define (leap-year? year)
  (if (and (and (div-by-4? year) (div-by-100? year)) (div-by-400? year)) #t 
      (if (and (div-by-4? year) (not (div-by-100? year))) #t #f)))

(define (div-by-4? year)
  (if (= (modulo year 4) 0) #t #f))

vdeemann

brew install elixir

mix archive.install hex phx_new
mix phx.new demo

################
# postgresql development environment setup
# https://www.highgo.ca/2023/06/23/setup-postgresql-development-environment-on-macos/
brew install git
brew install icu4c

vdeemann

(+ 1 2)

(+ 1 (+ 1 (+ 1 1) 2) 3 4 5)

(+ 3 4)

;; Play with your computer’s mouse to find the menu that changes the
;; fraction into decimal expansion.
;; https://stackoverflow.com/a/76037629/8706936
;; Language > Choose Languages > "Beginning Student" > "Show Details"

vdeemann

#lang racket
(require racket/trace)

(define o+
  (lambda (n m)
    (cond
      ((zero? m) n)
      (else (add1 (o+ n (sub1 m)))))))

;(trace o+)

vdeemann

#lang sicp
;#lang racket

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

(define (sum-of-squares x y)
  (+ (square x) (square y)))

(define (sum-two-largest a b c)
  (cond

vdeemann

#lang racket
(require racket/trace)

;(*) Find the last box of a list.
; my recursive length of a list
(define (len lst)
  (if (eq? lst null)
      0
      (+ 1 (len(cdr lst)))
      ))

vdeemann

1.) create a .vimrc file if none exists
https://stackoverflow.com/~/10921485


2.) install pathogen

mkdir -p ~/.vim/autoload ~/.vim/bundle && \
curl -LSso ~/.vim/autoload/pathogen.vim https://tpo.pe/pathogen.vim

vdeemann

# ------------------------------------[FILTERS]-------------------------------------
0.0.0.0 
0.0.0.0 
0.0.0.0 
0.0.0.0 
0.0.0.0 
0.0.0.0 
0.0.0.0 
0.0.0.0 
0.0.0.0 

vdeemann

1.) Open your current Firefox Profile folder
    a.) On the Firefox address bar type about:support
    b.) Folder path is in “Profile Folder” section, use that and navigate to it
2.) create a folder called chrome
3.) go into created folder and create a userChrome.css file
4.) In userChrome.css paste in code from:
        
        (use the gist snippet below)
        
5.) activate custom stylesheets in Firefox: