giannisp

After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

Database files have to be updated before starting the server, here are the steps that had to be followed:

# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
brew unlink postgresql
brew install postgresql@9.6
brew unlink postgresql@9.6
brew link postgresql

yossorion

What I Wish I'd Known About Equity Before Joining A Unicorn

Disclaimer: This piece is written anonymously. The names of a few particular companies are mentioned, but as common examples only.

This is a short write-up on things that I wish I'd known and considered before joining a private company (aka startup, aka unicorn in some cases). I'm not trying to make the case that you should never join a private company, but the power imbalance between founder and employee is extreme, and that potential candidates would

varyonic

web:
  build: .
  volumes:
    - .:/opt/myapp
  ports:
    - '3000:3000'
  links:
    - db
    - redis
    - selenium

wvengen

Finding a Ruby memory leak using a time analysis

When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.

There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the

craigweston

module ActiveRecord
  module Querying
    delegate :or, :to => :all
  end
end

module ActiveRecord
  module QueryMethods
  	 # OrChain objects act as placeholder for queries in which #or does not have any parameter.
    # In this case, #or must be chained with any other relation method to return a new relation.

glamp

Modifying an Existing Docker Image

To install a custom package or modify an existing docker image we need to

1. run a docker a container from the image we wish to modify
2. modify the docker container
3. commit the changes to the container as a docker image
4. test changes made to image

1.) Running a docker container from an image

maxivak

Integrate Gem/Engine and main Rails app

Overview

• Paths
• Routes
• Add functionality to controller
• Improving (Extending or overriding) Engine functionality
• Helpers
• Assets

olivierlacan

This guide assumes that you recently run brew upgrade postgresql and discovered to your dismay that you accidentally bumped from one major version to another: say 9.3.x to 9.4.x. Yes, that is a major version bump in PG land.

First let's check something.

brew info postgresql

The top of what gets printed as a result is the most important:

dior001

Authors:

Abstract

Vehicula Tortor Ipsum

Materials

Equipment

Procedure

dior001

Aut accusantium nisi quia veniam. Quia distinctio in quaerat praesentium molestias illo. Et corporis facere. Unde atque debitis perferendis eos cupiditate. Minima eaque voluptas quam.