jethrokuan

Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

jethrokuan

Keybase proof

I hereby claim:

• I am jethrokuan on github.
• I am jethroksy (https://keybase.io/jethroksy) on keybase.
• I have a public key whose fingerprint is 9A69 81EE 6543 8CBF 592A C3D5 E25D BF2B EE01 EB11

To claim this, I am signing this object:

jethrokuan

Discussion Group Exercises Week 4

Problems

Problem 1

What is the recursive definition of Pascal's triangle? What are the base cases?

1. row == 1
2. column == 1 (first element of each row)
3. column == row(last element of each row)

jethrokuan

// Bookmarklet Usage:
javascript:(function () {
  var audio = new Audio('https://notificationsounds.com/notification-sounds/definite-555/download/ogg');

  var targetNode = document.getElementsByClassName("ng-toast__list")[0];
  var config = {
    childList: true,
    subtree: true 
  };

jethrokuan

Get Clear [0/3]

• [ ] Collect Loose Papers and Materials: Pull out all miscellaneous pieces of paper, business cards, receipts, and so on that have crept into the crevices of your desk, clothing, and accessories. Put it all in your in-tray for processing.
• [ ] Get “IN” to Zero: Review any meeting notes and miscellaneous scribbles on notepaper or in your mobile devices. Decide and list any action items, projects, waiting-fors, calendar events, and someday/maybes, as appropriate. File any reference notes and materials. Get the “in” areas of e-mails, texts, and voice mails to

jethrokuan

{pkgs, ...}:

{
  environment.systemPackages = with pkgs; [
    pass
    isyncUnstable
    msmtp
    notmuch
    pinentry_qt5
  ];

jethrokuan

{pkgs, ...}:

let
  hostsVersion = "1553048103e57638ae653843ae1b8258ece1423a";
in
{
  networking.networkmanager.enable = true;

  networking.extraHosts = builtins.readFile (pkgs.fetchurl {
    url = "https://github.com/StevenBlack/hosts/raw/${hostsVersion}/alternates/fakenews-gambling-porn/hosts";

jethrokuan

with import <nixpkgs> {};

(python36.buildEnv.override {
  extraLibs = with pkgs.python36Packages;
  [
    pip
    scikitlearn
    tensorflow
    numpy
    scipy

jethrokuan

with import <nixpkgs> {};

let
  ocamlPackages = pkgs.recurseIntoAttrs pkgs.ocamlPackages_latest;
  # findlibSiteLib = "${ocamlPackages.findlib}/lib/ocaml/${ocamlVersion}/site-lib";
  # ocamlVersion = (builtins.parseDrvName ocamlPackages.ocaml.name).version;
  # ocamlInit = pkgs.writeText "ocamlinit" ''
  #   let () =
  #     try Topdirs.dir_directory "${findlibSiteLib}"
  #     with Not_found -> ()

jethrokuan

with import <nixpkgs> {};

let
  ocamlPackages = pkgs.recurseIntoAttrs pkgs.ocamlPackages_latest;
  findlibSiteLib = "${ocamlPackages.findlib}/lib/ocaml/${ocamlVersion}/site-lib";
  ocamlVersion = (builtins.parseDrvName ocamlPackages.ocaml.name).version;
  ocamlInit = pkgs.writeText "ocamlinit" ''
    let () =
      try Topdirs.dir_directory "${findlibSiteLib}"
      with Not_found -> ()