박천(Cheon Park) say8425

원제 : 55 Trivia Notations you should know in Ruby
원문 : kyoendo
출처 : http://melborne.github.io/2013/03/04/ruby-trivias-you-should-know-4/
번역 : nacyot [email protected]
라이센스 : cc-by-nc

알아두면 도움이 되는 55가지 루비 기법

Ruby는 즐거운 언어입니다. Ruby를 사용하다보면 매뉴얼에도 나와있지 않은 '작은 발견'을 만나게 됩니다. 이러한 '발견'은 프로그램의 질이나

前書き

AWS SDKを使ったアプリケーションを作る時credentialsの扱いがいつも面倒なので、ベストプラクティス的なものを考えていきたい。

例として、

$ ruby myec2.rb list

Rails naming conventions

General Ruby conventions

Class names are CamelCase.

Methods and variables are snake_case.

Methods with a ? suffix will return a boolean.

Configuring AWS ECS to have access to AWS EFS

If you would like to persist data from your ECS containers, i.e. hosting databases like MySQL or MongoDB with Docker, you need to ensure that you can mount the data directory of the database in the container to volume that's not going to dissappear when your container or worse yet, the EC2 instance that hosts your containers, is restarted or scaled up or down for any reason.

Don't know how to create your own AWS ECS Cluster? Go here!

New Cluster

Sadly the EC2 provisioning process doesn't allow you to configure EFS during the initial config. After your create your cluster, follow the guide below.

New Task Definition for Web App

If you're using an Alpine-based Node server like duluca/minimal-node-web-server follow this guide:

	// UIImage+Alpha.h
	// Created by Trevor Harmon on 9/20/09.
	// Free for personal or commercial use, with or without modification.
	// No warranty is expressed or implied.

	// Helper methods for adding an alpha layer to an image
	@interface UIImage (Alpha)
	- (BOOL)hasAlpha;
	- (UIImage *)imageWithAlpha;
	- (UIImage *)transparentBorderImage:(NSUInteger)borderSize;

	t = 236 # seconds
	Time.at(t).utc.strftime("%H:%M:%S")
	=> "00:03:56"

	# Reference
	# http://stackoverflow.com/questions/3963930/ruby-rails-how-to-convert-seconds-to-time

	# because i can never remember exactly how and when to use concat
	# when building content in helpers
	def nested_content
	content_tag 'div' do
	concat(content_tag 'span', 'span block')
	concat(tag 'br')
	concat(link_to 'root link', root_path)
	concat(tag 'br')
	concat(link_to('#') do
	concat(content_tag 'h2', 'Head \'em off')

	class MyJob < ActiveJob::Base
	queue_as :urgent

	rescue_from(NoResultsError) do
	retry_job wait: 5.minutes, queue: :default
	end

	def perform(*args)
	MyService.call(*args)
	end

	.git
	.gitignore
	/doc
	.yardoc
	coverage
	jsdoc
	/tmp
	/log
	Dockerfile
	Dockerfile.prod

	#!/bin/bash
	if [ -f ~/Library/KeyBindings/DefaultkeyBinding.dict ]; then
	echo "~/Library/KeyBindings/DefaultkeyBinding.dict already exists"
	exit -1
	fi

	mkdir -p ~/Library/KeyBindings
	cat << EOF > ~/Library/KeyBindings/DefaultkeyBinding.dict
	{
	"₩" = ("insertText:", "\`");