zentetsukenz

function pluck (arrayOfObject, property) {
  return arrayOfObject.map(function (item) {
    return item[property];
  });
};

zentetsukenz

ActiveRecord::Base.transaction do
  100.times do |i|
    Item.create({
      name: "item #{i + 1}"
    })
  end
end

zentetsukenz

add_foreign_key :source_table_name, :target_table_name, column: :explicit_column_name

zentetsukenz

array_of_objects.map { |object| object.field_to_sum }.inject(:+)

zentetsukenz

def find_mismatch_value_between_hash(a, b)
  pivot_hash = a
  another_hash = b
  
  result_hash = {}
  
  pivot_hash.keys.each do |k|
    pivot_value = pivot_hash[k]
    another_value = another_hash[k]
    

zentetsukenz

# gem install ascii_charts # if necessary
require 'ascii_charts'
require 'benchmark'
require './test.rb'

include Benchmark

class Runner
  def self.run
    new.run

zentetsukenz

Class A
  attr_accessor :name, :value
  
  def initialize
    @value = rand(10)
    @name = "Mr. #{@value}_#{rand(100)}"
  end
end

a = Array.new(10).collect { |e| e = A.new }

zentetsukenz

Keybase proof

I hereby claim:

• I am zentetsukenz on github.
• I am zentetsuken (https://keybase.io/zentetsuken) on keybase.
• I have a public key whose fingerprint is A806 B364 D7DA 20B7 6823 313B D576 6A02 170C 4847

To claim this, I am signing this object:

zentetsukenz

Docker

Files and Folders.

|
|\_ app
|...
|\_ docker
| |

zentetsukenz

Connect to host database

1. Create new database user with password for docker.
2. Configure postgresql.conf to listen for connection from docker network which usually is 172.17.0.0/16. The file's usually located at /usr/local/var/postgres/postgresql.conf for Mac OS X.

Example, add this entry into postgresql.conf file.

listen_addresses = '172.17.0.0/16, localhost'