ArthurZheng

Keybase proof

I hereby claim:

• I am arthurzheng on github.
• I am junzheng (https://keybase.io/junzheng) on keybase.
• I have a public key ASBjSqeSkrMbZ6s8W8f6OkDU_G6QLOZbl8tybTUg8REEvwo

To claim this, I am signing this object:

ArthurZheng

Commands to keep your app healthy, Ruby and Rails gems wise.

Open new Terminal, note the gemsets showing:

rvm gemset list

You will see you are using the (default) gemset.
Keep your system up to date with rvm and brew:

rvm get head

ArthurZheng

Setup

Replace IRB with Pry (in your Gemfile) and Byebug with pry-byebug.

gem 'pry-rails', group: [:development, :test]
gem 'pry-byebug', group: [:development, :test]

Using PRY

ArthurZheng

apiVersion: v1
kind: ConfigMap
metadata:
  name: example
  namespace: default
data:
  APPLICATION_HOST: example.com
  LANG: en_US.UTF-8
  PIDFILE: /tmp/server.pid
  PORT: "3000"

ArthurZheng

Last year I started playing around with using memoized private helper methods in my controllers instead of the traditional instance variable assigns we see in RoR controllers. Here's an example:

class PostsController < ApplicationController
  helper_method :new_post, :post, :posts
  
  def new; end
  def show; end
  def edit; end
 def index; end

ArthurZheng

Default

Powerlevel10k

ArthurZheng

This is a fork of original gist https://gist.github.com/nrollr/3f57fc15ded7dddddcc4e82fe137b58e, with slight changes on pointing to 5.7 version branch, instead of 8 (latest default of MySQL in Hombrew).

Install MySQL 5.7 on macOS

This procedure explains how to install MySQL using Homebrew on macOS (Sierra 10.12 and up)

Install Homebrew

• Installing Homebrew is effortless, open Terminal and enter :
  $ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
• Note: Homebrew will download and install Command Line Tools for Xcode 8.0 as part of the installation process.

ArthurZheng

How to break long lines up in Ruby

This page lists the options for breaking single-line expressions into multiple lines in Ruby.

Developers and teams need to come to their own decisions about which guideline(s) they prefer (preferences below are just my personal choices and I encourage you to disregard them).

# With trailing parens
x = [1, 2, 3].join(
 '-'

ArthurZheng

Using Rspec with Rails 4 patch method

In Rails 4 PATCH is the new HTTP methode for an update action. You can find the details here: http://weblog.rubyonrails.org/2012/2/25/edge-rails-patch-is-the-new-primary-http-method-for-updates/

Using PATCH in your specs

As you can imagine you need to use the PATCH method to test the update action in your controller. Because of how the users controller in this example works you need to specify the id and user. This particular spec tests whether the user gets redirected if it's not logged in.

(./spec/controllers/users_controller_spec.rb)

require 'spec_helper'

ArthurZheng

#!/usr/bin/env python
##### USE ON YOUR OWN RISK - THIS IS GOING TO DEREGISTER AMI OLDER THAN 30 DAYS

import boto3
from dateutil.parser import parse
import datetime
age = 30
aws_profile_name = 'prod'
def days_old(date):
    get_date_obj = parse(date)