vu3rdd

#lang racket
(require rackunit)

(define (distinct? xs)
  (= (set-count (list->set xs)) (length xs)))

(check-equal? (distinct? '()) #t)
(check-equal? (distinct? '(1)) #t)
(check-equal? (distinct? '(1 2)) #t)
(check-equal? (distinct? '(1 1)) #f)

vu3rdd

• You don't have to be perfect.
• Try to do a 80-90% solution. Make it better as you go or when a customer demands it.
• Stick to your strengths.
• Try your best to work for yourself, life is short.
• Maximize happiness by reducing the unhappy experiences.
• avoid contacts with people you don't like or will make you unhappy.
• start something on your own, as early as possible in your career.
• If there are constraints (like family, financial etc), try to do consulting.

vu3rdd

#lang racket
(require rackunit)

;; map :: (a -> b -> c) -> [a] -> [b] -> [c]
(define (map f . xs)
  (match xs
    [(list (list) ...) (list)]
    [(list (list x xs ...) ...) (cons (apply f x) (apply map f xs))]))

(check-equal? (map sqr '(1 2 3)) '(1 4 9))

vu3rdd

#lang racket

(require rackunit)

(define (interpret expr)
  (match expr
    [`(let ,(? (lambda (b) (or (empty? b) (pair? b))) bindings) ,body ...) 
     (let->combination expr)]
    [`(let* ,bindings ,body ...)
     (let*->nested-lets expr)]

vu3rdd

Some notes on the python scope:

Python has a weird scoping problem, which stems from its intention to create a nice
surface syntax and perhaps to satisfy the imperative programming paradigm. This
affects the semantics of the Python programs in unintuitive ways.

Consider the following code:

A. 

vu3rdd

There's something really liberating about having some corner of your life 
that's *yours*, that no one gets to see except you. It's a little like nudity 
or taking a dump. Everyone gets naked every once in a while. Everyone has to 
squat on the toilet. There's nothing shameful, deviant or weird about either 
of them. But what if I decreed that from now on, every time you went to 
evacuate some solid waste, you'd have to do it in a glass room perched in
the middle of Times Square, and you'd be buck naked?

Even if you've got nothing wrong or weird with your body -- and how many of 
us can say that? -- you'd have to be pretty strange to like that idea. Most

vu3rdd

Context

This tweet explains it all.

I have a huge pile of papers on my computer waiting to be read. Often I read parts of it immediately after I see the paper, but I forget about it until someone points on another article, how awesome that paper is. I then remember to read it more carefully.

One way to fix it is to work with like minded people and have serious (non-hand wavy) discussion around the paper.

The list below will grow. My hard disk has more papers than I can count. I have carefully chosen a list of very readable papers in the list below. Special thanks for the authors for publishing their great ideas.

vu3rdd

http://sprunge.us is a paste service. It is used by the 9front (a fork of plan9) folks (who hangout in the #cat-v channel on irc.freenode.net). To use sprunge from plan9, one could use the commandline http PUT client, hput.

Let us say, you got an error while compiling stuff. This is what I do. I select the area (using mouse key 1, i.e. left key), use mouse key 2 (i.e. middle ket) to "snarf" (plan9 lingo for copy). I then open acme and click the "paste" tag and "put" (acme lingo for save) the file into the disk.

Now to post the file named say "errors.txt", I do this:

term% hpost -u http://sprunge.us -p http://sprunge.us sprunge@errors.txt # hit enter
http://sprunge.us/EUJF

The second line is the response from sprunge.us with the URL.

vu3rdd

#ifndef TEST_DEFINED
#define TEST_DEFINED

#define OFFSET(x, y)  &((x *)0)->y

typedef unsigned int __u32;
typedef int __s32;
typedef long long __s64;
typedef unsigned char __u8;

vu3rdd

• New methods in whole disk encryption
• Matthew Green's practical crypto course -- syllabus
• Matthew Green's practical Crypto -- course page
• Matthew Green's useful crypto resources page
• Thomas Ptacek's review of Cryptography Engineering