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Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}'

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

ByteDecoder

p ="password"
#according to PKCS#5, should be at least 8 bytes. Public information, can be stored along with the pwd.
s = OpenSSL::Random.random_bytes(16) 
c = 20000 # varies depending on how fast the system is, tweak until it takes "long enough"
digest = OpenSSL::Digest::SHA256.new
#should be >= the output size of the underlying hash function, but ">" doesn't improve security (says PKCS#5)
dk_len = digest.digest_length

#store the result for new passwords 
value = OpenSSL::PKCS5.pbkdf2_hmac(p, s, c, dk_len, digest)

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Rails naming conventions

General Ruby conventions

Class names are CamelCase.

Methods and variables are snake_case.

Methods with a ? suffix will return a boolean.

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In test/test_helper.rb...

### Bullet (N+1 queries)

if ENV['BULLET']
  Bullet.enable = true

  require 'minitest/unit'

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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

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# Download codeclimate test reporter
curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./codeclimate-test-reporter
chmod +x ./codeclimate-test-reporter

# Install dotnet tools to generate test report
dotnet tool install --global coverlet.console 
dotnet add package coverlet.msbuild

# Start codeclimate process
./codeclimate-test-reporter before-build

ByteDecoder

This blog post has helped me clean up my postgres development environment on Mac. So making a copy!

How completely uninstall PostgreSQL 9.X on Mac OSX

This article is referenced from stackoverflow:

If installed PostgreSQL with homebrew , enter brew uninstall postgresql

If you used the EnterpriseDB installer , follow the following step.

ByteDecoder

This blog post has helped me clean up my postgres development environment on Mac. So making a copy!

How completely uninstall PostgreSQL 9.X on Mac OSX

This article is referenced from stackoverflow:

If installed PostgreSQL with homebrew , enter brew uninstall postgresql

If you used the EnterpriseDB installer , follow the following step.

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Install dependencies

brew install cmake
brew install python
sudo easy_install pip

Add powerline bin to your path. In your zshrc file (or the paths files sourced in zshrc) add the following line

PATH="/usr/local/share/python/:$PATH"

Reinstall MacVim with brew

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