benjamintanweihao

require 'complex'
 
RES = 0.03
ESCAPE_RADIUS = ARGV[0].to_f || 2.0
COLORS = [
  "\033[31m",
  "\033[32m",
  "\033[33m",
  "\033[34m",
  "\033[35m",

benjamintanweihao

Channels Are Not Enough

... or Why Pipelining Is Not That Easy

Golang Concurrency Patterns for brave and smart.

By @kachayev

Intro

benjamintanweihao

SPC> +	Function Calls
mcb	alchemist-compile-this-buffer
mel	alchemist-eval-current-line
meL	alchemist-eval-print-current-line
mer	alchemist-eval-region
meR	alchemist-eval-print-region
meb	alchemist-eval-buffer
meB	alchemist-eval-print-buffer
mgt	alchemist-project-open-tests-for-current-file

benjamintanweihao

defmodule HttpRequester do
  use GenServer.Behaviour

  def start_link(_) do
    :gen_server.start_link(__MODULE__, nil, [])
  end

  def fetch(server, url) do
    :gen_server.cast(server, {:fetch, url})
  end

benjamintanweihao

Questions about Distributed systems by @tsantero.

1. explain the life of an http request.
2. what does the FLP result teach us?
3. what is a byzantine failure?
4. explain CRDTs
5. explain linearizability.
6. how does DNS work?
7. crash-stop vs crash-recovery?
8. difference between soft and hard real time

benjamintanweihao

;;; packages.el --- elm Layer packages File for Spacemacs
;;
;; Copyright (c) 2012-2014 Sylvain Benner
;; Copyright (c) 2014-2015 Sylvain Benner & Contributors
;;
;; Author: Sylvain Benner <[email protected]>
;; URL: https://github.com/syl20bnr/spacemacs
;;
;; This file is not part of GNU Emacs.
;;

benjamintanweihao

(defun dotspacemacs/config ()
  (setq racer-rust-src-path "/Users/benjamintan/workspace/rust/src/")
  (setq racer-cmd "/Users/benjamintan/Desktop/racer/target/release/racer")
  (add-to-list 'load-path "/Users/benjamintan/Desktop/racer/editors/emacs")
  (eval-after-load "rust-mode" '(require 'racer))
)

benjamintanweihao

Generated blitzy app
** (UndefinedFunctionError) undefined function: Access.List.get/2 (module Access.List is not available)
    Access.List.get([app: :blitzy, version: "0.0.1", elixir: "~> 1.0", escript: [main_module: Blitzy.CLI], deps: [httpoison: "~> 0.7", timex: "~> 0.19"], aliases: [], build_per_environment: true, build_embedded: false, default_task: "run", deps_path: "deps", elixirc_paths: ["lib"], erlc_paths: ["src"], erlc_include_path: "include", erlc_options: [:debug_info], lockfile: "mix.lock", preferred_cli_env: [], start_permanent: false], :apps_path)
    (mix) lib/mix/project.ex:171: Mix.Project.umbrella?/1
    (mix) lib/mix/tasks/app.start.ex:78: Mix.Tasks.App.Start.start/2
    (mix) lib/mix/tasks/app.start.ex:68: Mix.Tasks.App.Start.run/1
    (mix) lib/mix/tasks/run.ex:63: Mix.Tasks.Run.run/1
    (mix) lib/mix/cli.ex:55: Mix.CLI.run_task/2

benjamintanweihao

function get(url) {
  return Rx.Observable.create(function(observer) {
  
    var req = new XMLHttpRequest();
    req.open('GET', url);
    req.onLoad = function() {
      if (req.status == 200) {
        observer.onNext(req.response);  
        observer.onCompleted();  
      }

benjamintanweihao

// This works!

onView(withId(R.id.drawer)).perform(swipeUp())

// This doesn't.
onView(withId(R.id.drawer))
  .perform( actionOnItemAtPosition(5, click()));

onView(allOf(
      withText(R.string.settings),