.plan

Knowledge, wisdom even, lies in depth, not extension.

• Tim Parks
  Reading Is Forgetting
  

I’ve been working on porting some bitwise logic from Java to Python
and it’s been as awful as that sentence sounds.

The main gotcha that I’ve run into has something to do with the fact
that an int in Java is 32-bits so the logical NOT of an integer is
different in Python vs Java.

So in python you get:

>>> bin(~0x000000ff)
'-0b100000000'

Whereas with java:

public class BitWise {
    public static void main(String[] args) {
	System.out.format("%s\n", Integer.toBinaryString(~0x000000ff));  // Prints: 11111111111111111111111100000000
    }
}

I ran into a problem because I was trying to XOR the output of a
NOT which, obviously, comes out differently if you have different
expecations what comes from NOT, i.e.:

assert(0b11111111111111111111111100000000 != -0b100000000)

The way around this for me, was to AND the NOT output with
0xffffffff. There are probably some weird edge-cases here ¯\_(ツ)_/¯.

I’m always learning and losing dumb git tricks. Here are a few I might
lose if I don’t keep them someplace:

In ancient days, on the computer networks of the Sumerians and
Hittites, people kept .plan files as a way to disseminate useful
and/or amusing information.

– Dave Loffredo

Deep in him, beneath his memory, was the knowledge of hardship and
hunger and endurance and pain. Though he seldom thought of his early
years on the Booneville farm, there was always near his consciousness
the blood knowledge of his inheriteance, give him by forefathers whose
lives were obscure and hard and stoical and whose common ethic was to
present to an oppressive world faces that were expressionless and hard
and bleak

– John Williams, Stoner

I burrowed into RFC 5322’s Address Spec for a long time today. This
resulted in a fun side-trip into Augmented BNF for Syntax
Specifications: ABNF.

Email addresses break down to their Core Rules like this:

addr-spec       =   local-part "@" domain

addr-spec       =   dot-atom / quoted-string / obs-local-part
		    @
		    dot-atom / domain-literal / obs-domain

addr-spec       =   [CFWS] dot-atom-text [CFWS] / [CFWS]  DQUOTE *([FWS] qcontent) [FWS] DQUOTE [CFWS] / word *("." word)
		    @
		    [CFWS] dot-atom-text [CFWS] / [CFWS] "[" *([FWS] dtext) [FWS] "]" [CFWS] /  atom *("." atom)

addr-spec       =   [(1*([FWS] comment) [FWS]) / FWS] 1*atext *("." 1*atext) [(1*([FWS] comment) [FWS]) / FWS] /
		    [(1*([FWS] comment) [FWS]) / FWS] DQUOTE *([([*WSP CRLF] 1*WSP) /  obs-FWS] qtext / quoted-pair) [([*WSP CRLF] 1*WSP) /  obs-FWS] DQUOTE [(1*([FWS] comment) [FWS]) / FWS] /
		    (atom / quoted-string) *("." (atom / quoted-string))
		    @
		    ...
		    /me dies

The density of local-part "@" domain weighs on me.

What was impressed upon me is how viscous all communication is: a
means to deliever a message becomes a dense message of its own.

A valid domain is:

atext           =   ALPHA / DIGIT /    ; Printable US-ASCII
		    "!" / "#" /        ;  characters not including
		    "$" / "%" /        ;  specials.  Used for atoms.
		    "&" / "'" /
		    "*" / "+" /
		    "-" / "/" /
		    "=" / "?" /
		    "^" / "_" /
		    "`" / "{" /
		    "|" / "}" /
		    "~"

dtext           =   %d33-90 /          ; Printable US-ASCII
		    %d94-126 /         ;  characters not including
		    obs-dtext          ;  "[", "]", or "\"

domain          =  dot-atom / domain-literal / obs-domain

domain          =  ([CFWS] dot-atom-text [CFWS]) /                 ; dot-atom
		   ([CFWS] "[" *([FWS] dtext) [FWS] "]" [CFWS]) /  ; domain-literal
		   (atom *("." atom))                              ; obs-domain

domain          =  ([CFWS] 1*atext *("." 1*atext) [CFWS]) /                   ; dot-atom
		   ([CFWS] "[" *([FWS] dtext) [FWS] "]" [CFWS]) /             ; domain-literal
		   (([CFWS] 1*atext [CFWS]) *("." ([CFWS] 1*atext [CFWS])))   ; obs-domain

If we get rid of the Content Folding White Space which has a lot of rules and seems to be everywhere and is a context-free grammar we get something like:

(?:(?:[a-z0-9!#$%&'*+\/=?^_`{|}~-]+[a-z0-9.!#$%&'*+\/=?^_`{|}~-]*)|(?:\[(?:[\x21-\x5A]|[\x5E-\x7E]|\[\\\])\]))

“rock ‘n’ roll 7"s from the ‘80s”

Variadic Function – a function of indefinite airity.
Considered complimentary to the apply function which
is central to languages derived from lambda calculus.

Use in ES2015:

var printAwards = function(...places) {
    for (var place of places) {
	console.log(place);
    }
}

Never thought about it:

• x >> 2 == x / 2
  
• x << 2 == x * 2
  

“Finding RFCs for a particular topic is an art.”

‘’;!–"<XSS>=&{()}

I Didn’t particuarly enjoy this talk, but this quote was good:

Good judgment comes from experience, and experience comes from bad judgment.
So if things aren’t going well, it probably means you’re learning a lot
and things will go better later.

Randy Pausch
Time Management
https://youtu.be/oTugjssqOT0

Security at the expense of usability comes at the expense of security.

AviD
http://security.stackexchange.com/questions/6095/xkcd-936-short-complex-password-or-long-dictionary-passphrase/6116#6116

The Magic Words are Squeamish Ossifrage

You held your head like a hero
On a history book page
It was the end of a decade
But the start of an age

• Taylor Swift, Voice of Our Age
  

A complex system that works is invariably found to have evolved from a simple
system that worked. A complex system designed from scratch never works and
cannot be patched up to make it work. You have to start over with a working
simple system.

– John Gall (Systemantics: How Systems Really Work and How They Fail.)

• Manfrotto MTPIXI-B PIXI Mini Tripod, Black
  
• Leuchtturm Master Notebook, Squared, 8.75 x 12.5 Inch (LBM12)
  
• Zeiss Pre-Moistened Lens Cleaning Wipes, 200 Count
  

Hardware I have:

• Lenovo ThinkPad x230t
  
• Vortex Poker II
  
• Evoluent Vertical Mouse
  
• HRT Music Streamer II
  
• RockIt Sounds R-50
  
• Baratza Virtuoso
  
• DJI Phantom II Zenmuse H4-3D Gimbal
  

Hardware I think about:

• Purism Librem 13 Laptop
  
• Kenisis Advantage
  
• Nikon D800
  
• Mahlkonig Guatemala Lab
  

1. Solar Calculation Details
   http://www.esrl.noaa.gov/gmd/grad/solcalc/calcdetails.html
   
2. Diceware passphrase
   http://world.std.com/~reinhold/diceware.html
   
3. Receiving NOAA Weather Satellite Images
   http://www.rtl-sdr.com/rtl-sdr-tutorial-receiving-noaa-weather-satellite-images/
   
4. George Washington’s Rules of Civility and Decent Behavior: in Company and Conversation
   https://archive.org/stream/georgewashington00unse/georgewashington00unse_djvu.txt
   
5. Catchup
   http://boardgamegeek.com/boardgame/68199/catchup
   

NICK BOSTROM
SUPERINTELLIGENCE
Paths, Dangers, Strategies

1. Why artist payment rises without productivity increases:
   
2. Nick Bostrom’s Simulation Hypothesis:
   
3. Seven Bridges of Königsberg:
   
4. Gombe Chimpanzee War
   
5. Cisgender
   
6. 2147483647
   
7. Monkey Selfie
   
8. Erdős–Bacon number
   
9. Dolgopolsky list
   
10. Bus Factor
    
11. Graham’s number
    
12. Alexander Stepanov
    
13. Mojibake
    
14. Fool’s Gold Loaf
    
15. Sturgeon’s Law
    
16. Project West Forward
    
17. Mammalian diving reflex
    
18. Lists of lists of lists
    

If nature has made any one thing less susceptible than all others of
exclusive property, it is the action of the thinking power called an idea,
which an individual may exclusively possess as long as he keeps it to
himself; but the moment it is divulged, it forces itself into the
possession of every one, and the receiver cannot dispossess himself of it.

– Thomas Jefferson

If make his point clear, Yoda could, give a shit about Oxford commas,
nobody should.
– Peter Huntwelch

Nobody Understands Punctuation

The programmer, like the poet, works only slightly removed from pure
thought-stuff. He builds his castles in the air, from air, creating by
exertion of the imagination. Few media of creation are so flexible, so easy
to polish and rework, so readily capable of realizing grand conceptual
structures… Yet the program construct, unlike the poet’s words, is real
in the sense that it moves and works, producing visible outputs separate
from the construct itself. […] The magic of myth and legend has come
true in our time. One types the correct incantation on a keyboard, and a
display screen comes to life, showing things that never were nor could be.

– Fred Brooks

Movies

Art

TV Shows

There ain’t no rules around here. We’re trying to accomplish something.

– Thomas Edison

Poetry is like a curvy slide in a playground - an odd object, available
to the public - and, as I keep explaining to my local police force,
everyone should be able to use it, not just those of a certain age.

– Lemony Snicket

http://www.poetryfoundation.org/poetrymagazine/article/246328

The first man who, having fenced in a piece of land, said ‘This is mine,’
and found people naïve enough to believe him, that man was the true
founder of civil society. From how many crimes, wars, and murders, from
how many horrors and misfortunes might not any one have saved mankind, by
pulling up the stakes, or filling up the ditch, and crying to his fellows:
Beware of listening to this impostor; you are undone if you once forget
that the fruits of the earth belong to us all, and the earth
itself to nobody.

– Jean-Jacques Rousseau, Discourse on Inequality, 1754

http://www.constitution.org/jjr/ineq.txt

The following block of characters is an ASCII “Magic Eye” Random-Dot Stereogram.
Stare at it with your eyes focused at infinity and you will eventually see a
diamond suspended between two rows of columns.

               O               O               O               O
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MGB9q+s^{O!do5NEq+s^{OO!do5NNEq+s^^{OO!djo5NNEq+s^{OO!dj5NNEq+^{OO!d5NNEq+^Zq+^
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_i-lSmj$\b0e`mx=Smj$\bb0e`mxx=Smj$$\bb0eA`mxx=Smj$\bb0eAmxx=Sm$\bb0emxx=Sm$?Sm$
MtfCG_L{55Zk\6$"G_L{555Zk\6$$"G_L{{555Zk,\6$$"G_L{555Zk,6$$"G_{555Zk6$$"G_{.G_{
$I,1j%n09|iYzOkbj%n09||iYzOkkbj%n009||iYazOkkbj%n09||iYaOkkbj%09||iYOkkbj%0vj%0
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                                               (created by helder@ci.ua.pt)

A - Alpha    G - Golf    N - November  U - Uniform
B - Bravo    H - Hotel   O - Oscar     V - Victor
C - Charlie  I - India   P - Papa      W - Whiskey
D - Delta    J - Julia   Q - Quebec    X - X-Ray
E - Echo     K - Kilo    R - Romeo     Y - Yankee
F - Foxtrot  L - Lima    S - Sierra    Z - Zulu
             M - Mike    T - Tango