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#!/usr/bin/env python
import ssl
import json
import socket
import struct
import binascii


def send_push_message(token, payload):
    # the certificate file generated from Provisioning Portal

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package main

import (
	"crypto/rand"
	"flag"
	"log"
	mrand "math/rand"
	"net"
	"os"
	"os/signal"

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Rails Migration

http://guides.rubyonrails.org/migrations.html

Migrations methods:

• add_column
• add_index
• change_column
• change_table
• create_table
• drop_table

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class A
  def disp : String
    "call A"
  end
end

class B
  def disp : String
    "call B"
  end

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abstract class Parent #同じシグネチャなので、abstractを通して、制約をつける
  abstract def disp
end

class A < Parent
  def disp : String
    "call A"
  end
end

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module Indexable(T)
  def threadpool_map(workers : Int = 8, chunk_size : Int? = nil, &func : T -> R) forall T, R
    mutex = Thread::Mutex.new
    cs = chunk_size || (self.size**0.5).ceil.to_i
    Array(R).build(self.size) do |result|
      index = 0
      threads = Array.new(workers) {
        Thread.new do
          a = b = 0
          loop do

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EHSIZE = 0x34
PHSIZE = 0x20
PH_FILESZ_OFF = 0x10
PH_MEMSZ_OFF = 0x14
CODE_OFF = EHSIZE + PHSIZE
REAL_CODE_OFF = 0x08000000 + CODE_OFF

elf_header =
  # e_ident[0] = 0x7F                # EI_MAGIC1
  # e_ident[1] = "E"                 # EI_MAGIC2

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#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <net/route.h>
#include <sys/types.h>
#include <sys/ioctl.h>

int main(char** args) {
  int sockfd;

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; ModuleID = 'hello'

@.str = private constant [14 x i8] c"Hello, World!\00"

declare i32 @puts(i8* nocapture) nounwind

define i32 @main() {
  %1 = call i32 @puts(i8* getelementptr inbounds ([14 x i8]* @.str, i32 0, i32 0))
  ret i32 0
}

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# Based on http://matthiaseisen.com/articles/graphviz/

import graphviz as gv


styles = {
    'graph': {
        'label': 'Network Map',
        'fontsize': '16',
        'fontcolor': 'white',