mdaisuke

counter = 0
flag = true

threads = 10.times.map do
    Thread.new do
        if flag
            puts 'not thread safe' # IOを挟むとGVLが解放される
            counter += 1
            flag = false
        end

mdaisuke

ふりかえりのグランドルール

1． 積極的に参加すること

• 当事者意識を持つ
• 議題に集中すること

２． 一人で話しすぎないこと

• 人の発言をさえぎらない

mdaisuke

#!/usr/bin/env bash

############### USAGE ###############
# 
# 1. Create a new workspace on Cloud9 using the "Blank" template
#
# 2. Run this command in the console:
#    bash <(curl -fsSL https://gist.githubusercontent.com/padde/3c6301f15cbd5025e131740dae33aa95/raw/c9-elixir.sh)
#
# 3. There is no step 3!

mdaisuke

# -*- mode: ruby -*-
# vi: set ft=ruby :

# All Vagrant configuration is done below. The "2" in Vagrant.configure
# configures the configuration version (we support older styles for
# backwards compatibility). Please don't change it unless you know what
# you're doing.
Vagrant.configure("2") do |config|
  # The most common configuration options are documented and commented below.
  # For a complete reference, please see the online documentation at

mdaisuke

#include <stdio.h>

int main(int argc, char **argv) {
  int i;
  for (i = 1; i < argc; i++) {
    printf("%c", argv[i][0]);
  }
  printf("\n");
  return 0;
}

mdaisuke

# LVDB - LLOOGG Memory DB
# Copyriht (C) 2009 Salvatore Sanfilippo <[email protected]>
# All Rights Reserved

# TODO
# - cron with cleanup of timedout clients, automatic dump
# - the dump should use array startsearch to write it line by line
#   and may just use gets to read element by element and load the whole state.
# - 'help','stopserver','saveandstopserver','save','load','reset','keys' commands.
# - ttl with milliseconds resolution 'ttl a 1000'. Check ttl in dump!

mdaisuke

package main

import (
	"encoding/csv"
	"fmt"
	"io"
	"log"
	"os"
	"strconv"
	"strings"

mdaisuke

fn take_ownership(v: Vec<i32>) {
}

fn borrow_ref(v: &Vec<i32>) {
}

fn main() {
    //
    // Ownership
    // https://doc.rust-lang.org/stable/book/ownership.html

mdaisuke

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

mdaisuke

Docker 虎の巻

• Fork from Docker cheat sheet
• 実際にコマンドを試したい場合は、すぐにDockerを試したい人のための基礎コマンドを参照

何故Dockerを使うべきか

Why Should I Care (For Developers)

"Dockerが面白いのはシンプルな環境に隔離性と再現性をもたらしてくれることだ．ランタイムの環境を一度作れば、パッケージにして別のマシンでも再利用することできる．さらに，すべてはホスト内の隔離された環境で行われる（VMのように）．最も素晴らしい点は，シンプルかつ高速であることだ．"