Yoriki Yamaguchi y13i

Rustのパターンマッチの話

既に穴だらけですが、やれるだけやっていきます。今回はパターンマッチの話です。

TL;DR（経験者向け）

はい、あなたのよく知るパターンマッチです。ガードも使えますが、他の言語でガードを使うパターンの一部はOCamlのorパターンと同等の機能や範囲を表す機能によって置き換えることができます。

Markdownで画像を表示する

Markdownでは文書中に画像ファイルを表示することができる。GitHubでReadmeに使うと見栄えがいい。

Markdown記法で書くならこんな感じ。"サンプル"の部分は省略可能。

![エビフライトライアングル](http://i.imgur.com/Jjwsc.jpg "サンプル")

Ruby の HTTP クライアントライブラリ Faraday が便利そう

API ラッパの開発には [RestClient gem][rest_client_gem] だとか
OAuth の必要なものは [Net/HTTP][net_http] + [OAuth gem][oauth_gem] を使ってた

[Twitter gem][twitter_gem] や [Instagram gem][instagram_gem] など API ライブラリのソースを読んでみると
[Faraday gem][faraday_gem] というものがよく使われてた

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real

	-- based on http://stackoverflow.com/questions/21767780/how-to-find-size-of-database-schema-table-in-redshift
	SELECT name AS table_name, ROUND((COUNT(*) / 1024.0),2) as "Size in Gigabytes"
	FROM stv_blocklist
	INNER JOIN
	(SELECT DISTINCT id, name FROM stv_tbl_perm) names
	ON names.id = stv_blocklist.tbl
	GROUP BY name
	ORDER BY "Size in Gigabytes" DESC

	class List < Array
	undef_method %w(inject map size at index select reject detect all? any? one? none? min max minmax take_while grep include? partition group_by count join assoc zip reverse values_at compact take flat_map product) # !> `' interpreted as argument prefix

	def inject(init, &blk)
	return init if empty?
	(drop 1).inject( yield(init, first), &blk)
	end

	def map
	inject([]) { \|m, x\| m << yield(x) }

	diff -c sl/sl.c sl_kq/sl.c
	*** sl/sl.c 1998-07-22 23:01:01.000000000 +0900
	--- sl_kq/sl.c 2011-12-02 21:34:09.540165908 +0900
	***************
	* 33,73 **
	#include "sl.h"

	int ACCIDENT = 0;
	int LOGO = 0;
	int FLY = 0;