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PROMPT='%{%f%b%k%}$(build_prompt)%{$reset_color%}
➜ '

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public class EntityManagerHelper {

    private static final EntityManagerFactory emf; 
    private static final ThreadLocal<EntityManager> threadLocal;

    static {
        emf = Persistence.createEntityManagerFactory("BookStoreUnit");      
        threadLocal = new ThreadLocal<EntityManager>();
    }

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const convertContent = content => {
    const blockMap = content.getBlockMap();
    let newBlockMap = Map();

    blockMap.valueSeq().forEach(block => {
        if (block.getType() === 'code') {
            const data = block.getData().merge({ language: 'javascript' });
            const newBlock = block.merge({ type: 'code-block', data });
            newBlockMap = newBlockMap.set(block.key, newBlock);
        }

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#!/usr/bin/ruby
# Create display override file to force Mac OS X to use RGB mode for Display
# see http://embdev.net/topic/284710

require 'base64'

data=`ioreg -l -d0 -w 0 -r -c AppleDisplay`

edids=data.scan(/IODisplayEDID.*?<([a-z0-9]+)>/i).flatten
vendorids=data.scan(/DisplayVendorID.*?([0-9]+)/i).flatten

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title_page:
  logo_image: image:logo.png[]
page:
  layout: portrait
  margin: [3.2cm, 2cm, 2.2cm, 2cm]
  size: A4
base:
  font_color: #333333
  font_family: Helvetica
  font_size: 12

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# https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html#verify-key-pair-fingerprints

openssl rsa -in ~/.ssh/privatekey -pubout -outform DER | openssl md5 -c
openssl pkcs8 -in path_to_private_key -inform PEM -outform DER -topk8 -nocrypt | openssl sha1 -c

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AWS BeenStalk and Node.JS

Create new ebs application

eb init

Rename EBS environment name

eb config save my-env-name --cfg my-config-name # save the environment config
eb terminate # terminate the environment
eb create my-new-env-name --cfg my-config-name # Create a new cloned environment with a new name

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AWS RDS - Postgres 11

Recreate Database

\c postgres
SELECT pg_terminate_backend(pg_stat_activity.pid)
FROM pg_stat_activity
WHERE pg_stat_activity.datname = 'postgres'
  AND pid <> pg_backend_pid();
\c template1;

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AWS IAM

aws iam create-user --profile <aws-cli-profile> --user-name <username> 
aws iam create-login-profile --profile <aws-cli-profile> --user-name <username> --password '<password>'
aws iam delete-login-profile --profile >aws-cli-profile> --user <username>

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Update fork from upstream

git fetch upstream master
git merge upstream/master

Deploy from branch

Overwrite local staging branch (tracking upstream) with master(upstream fork) :