Naoto Yokoyama builtinnya

なぜ Erlang/OTP を使い続けるのか

更新:	2017-04-03
作者:	@voluntas
バージョン:	1.0.6
URL:	https://voluntas.github.io/

2017 年 4 月 1 日に行われた Elixir Conf Japan 2017 の発表者用のメモです。

- Inexplicable perversity of human nature.
- The clever machinations of MongoDB's marketing people.
- The AGPL license killed it.
- We spent too long development before monetizing.
- Bad performance.
- Numeric types limited to a 64-bit `float`.
- Great product, but didn't/couldn't translate to revenue.
- Bad business model.
- Failure in timezones/timestamp nuances.

この記事はGoogle Cloud Platform(1) Advent Calendar 2016の3日目となります！

Google Cloud Platform（以下、GCP）のサービスも一部はTokyoにようやくRegionが来たことだし、そろそろ利用してみたいと思った人も多いのではないでしょうか。今回は、Google Compute Engine(以下、GCE）をTerraformを利用して構成管理をしてみます。

特に意味はないですが、気づいたら文字ばかりだったので、下記に今回利用するサービスのロゴを載せます。

GCP	Terraform

Execution order of Jest/Jasmine test code

While tests run in source order, surrounding code does not which can lead to hard to debug issues.

Compare the test file below with the sample output below that and note the order of the log messages.

Key points

Any code not inside of it, beforeAll, afterAll, beforeEach or afterEach runs immediately on initialisation.
This means code at the end of your file runs before even your before hooks.

Recently CSS has got a lot of negativity. But I would like to defend it and show, that with good naming convention CSS works pretty well.

My 3 developers team has just developed React.js application with 7668 lines of CSS (and just 2 !important). During one year of development we had 0 issues with CSS. No refactoring typos, no style leaks, no performance problems, possibly, it is the most stable part of our application.

Here are main principles we use to write CSS for modern (IE11+) browsers:

SUIT CSS naming conventions + SUIT CSS design principles;
PostCSS + CSSNext. Future CSS syntax like variables, nesting, and autoprefixer are good enough;
Flexbox is awesome. No need for grid framework;
Normalize.css, base styles and variables are solid foundation for all components;

Example Usage

Users

id	name
1	Jane
2	Max
3	John
4	Scott

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

Why Uber Engineering Switched from Postgres to MySQL - Uber Engineering Blog のまとめ

Posgresqlだと

pgは追記型なので少しの更新でも多くのdiskへのwriteがおきる
カラムを一つ更新しただけで多くのindexの書き換えが起こる
よって、replicationはWALを送るので更新が多いとWALが大量に送られる
repcliationでは物理的なdiskの変更を送る
DC間でレプリするときつい
bugがあってreplica間でMVCCの不整合が起きる

	{
	"emojis": [
	{"emoji": "👩‍👩‍👧‍👧", "name": "family: woman, woman, girl, girl", "shortname": ":woman_woman_girl_girl:", "unicode": "1F469 200D 1F469 200D 1F467 200D 1F467", "html": "👩&zwj;👩&zwj;👧&zwj;👧", "category": "People & Body (family)", "order": ""},
	{"emoji": "👩‍👩‍👧‍👦", "name": "family: woman, woman, girl, boy", "shortname": ":woman_woman_girl_boy:", "unicode": "1F469 200D 1F469 200D 1F467 200D 1F466", "html": "👩&zwj;👩&zwj;👧&zwj;👦", "category": "People & Body (family)", "order": ""},
	{"emoji": "👩‍👩‍👦‍👦", "name": "family: woman, woman, boy, boy", "shortname": ":woman_woman_boy_boy:", "unicode": "1F469 200D 1F469 200D 1F466 200D 1F466", "html": "👩&zwj;👩&zwj;👦&zwj;👦", "category": "People & Body (family)", "order": ""},
	{"emoji": "👨‍👩‍👧‍👧", "name": "family: man, woman, girl, girl", "shortname": ":man_woman_girl_girl:", "unicode": "1F468 200D 1F469 200D 1F467 200D 1F467", "html": "👨&zwj;👩&z

	"""
	pybble.py

	Yup, you can run Python on your Pebble too! Go thank the good folks who
	made Transcrypt, a dead-simple way to take your Python code and translate
	it to very lean Javascript. In our case, instead of browser, we run it
	on Pebble using their equally dead-simple Online IDE and Pebble.js library.

	Here's a working example, it runs on a real Pebble Classic.