Kengo Nakajima kengonakajima

なぜ2段階認証を有効にするのか

githubの設定変更はGithubの二段階認証を設定しようにまとまっています。

2段階認証を有効にした場合のhttp/https経由のpush/pull操作

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

CPU Price Performance: DigitalOcean vs Linode

On DigitalOcean, as you go up the plan, you get higher per-core price as well.

https://www.digitalocean.com/pricing

$5 1 core     - $5/core
$10 1 core - $10/core

MessagePack for Ruby version 5

Today, I released the new version of MessagePack for Ruby!

Even faster
New API
API reference

Even faster

I rewrote all the code and achieved significant performance improvement, especially for serialization. I compared the new version to the old version (v4) using ruby-serializers benchmark, and the new version is faster for all data sets including Twitter, Image, Integers, Geo and 3D model.

how to compile

$ gcc -g -Wall -I /path/to/libuv/include /path/to/libuv/uv.a -framework CoreServices server.c -o server
$ gcc -g -Wall -I /path/to/libuv/include /path/to/libuv/uv.a -framework CoreServices client.c -o client

	XX( -1, UNKNOWN, "unknown error") \
	XX( 0, OK, "success") \
	XX( 1, EOF, "end of file") \
	XX( 2, EADDRINFO, "getaddrinfo error") \
	XX( 3, EACCES, "permission denied") \
	XX( 4, EAGAIN, "resource temporarily unavailable") \
	XX( 5, EADDRINUSE, "address already in use") \
	XX( 6, EADDRNOTAVAIL, "address not available") \
	XX( 7, EAFNOSUPPORT, "address family not supported") \
	XX( 8, EALREADY, "connection already in progress") \

	/*
	* rle.c -- by David Henry
	* last modification: dec. 28, 2004
	*
	* this code is free.
	*
	* cc -Wall -ansi rle.c -o $@
	*/

	#include <stdio.h>

	/**
	* Converts the player inventory to a String array of Base64 strings. First string is the content and second string is the armor.
	*
	* @param playerInventory to turn into an array of strings.
	* @return Array of strings: [ main content, armor content ]
	* @throws IllegalStateException
	*/
	public static String[] playerInventoryToBase64(PlayerInventory playerInventory) throws IllegalStateException {
	//get the main content part, this doesn't return the armor
	String content = toBase64(playerInventory);

	# 私が考える安全なプログラムを書くために必要なこと

	今も昔も「入力によって挙動が大幅に変わるAPI」が世の中には多数存在していて、プログラマが本来意図した挙動と異なる動作を引き起こしている。

	- ファイルを開こうとしたらコマンドを実行できてしまったり
	- CSSセレクタを書いてるつもりがHTMLタグを生成してしまったり
	- SELECT文を発行するつもりがDELETE文を発行できてしまったり

	こういったときに
	- 入力値検証をしないと危険になる

	#include <stdio.h>
	#include <uv.h>

	static void on_close(uv_handle_t* handle);
	static void on_connect(uv_connect_t* req, int status);
	static void on_write(uv_write_t* req, int status);

	static uv_loop_t *loop;

	static uv_buf_t alloc_cb(uv_handle_t* handle, size_t size) {