ByteDecoder

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)

ByteDecoder

Rails naming conventions

General Ruby conventions

Class names are CamelCase.

Methods and variables are snake_case.

Methods with a ? suffix will return a boolean.

ByteDecoder

def lookup(words, letter)
  words.drop(1).each { |word| return false unless word.include?(letter) }
  true
end

def char_sequence(words)
  sorted_words = []
  pattern = []
  words.each { |word| sorted_words << word.chars.sort(&:casecmp).join }
  sorted_words[0].chars.each { |letter| pattern << letter if lookup(words, letter) }

ByteDecoder

In test/test_helper.rb...

### Bullet (N+1 queries)

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

  require 'minitest/unit'

ByteDecoder

git config --global alias.lol "log --oneline --graph --decorate"

ByteDecoder

-- User Table
CREATE TABLE user (
id serial PRIMARY KEY,
account_id int not NULL,
name varchar(10)
);

-- Purchase Table
CREATE TABLE purchase (
id SERIAL PRIMARY KEY,

ByteDecoder

$ git rm -r --cached .
$ git add .
$ git commit -m ".gitignore fix"

ByteDecoder

const timeFuncRuntime = funcParameter => {
   let t1 = Date.now();
   funcParameter();
   let t2 = Date.now();
   return t2 - t1;
}

const addOneToOne = () => 1 + 1;

timeFuncRuntime(addOneToOne);

ByteDecoder

{
    "extends": "tslint:recommended",
    "rulesDirectory": "./custom-ts-rules",
    "rules": {
        "copyright-required": true,
        "max-line-length": {
            "options": [120]
        },
        "new-parens": true,
        "no-arg": true,