shtakai

require "active_record"

namespace :db do

  db_config       = YAML::load(File.open('config/database.yml'))
  db_config_admin = db_config.merge({'database' => 'postgres', 'schema_search_path' => 'public'})

  desc "Create the database"
  task :create do
    ActiveRecord::Base.establish_connection(db_config_admin)

shtakai

function createStore(reducer) {
    const store = {
        state: {},
        reducer,
        dispatch(action) {
            this.state = this.reducer(action, this.state)
        }
    }

    store.dispatch({})

shtakai

How to create small, unique tokens in Ruby

That is is basically a "fork" of blog article i'm constantly returning to. It seems that the blog is down:

• Original article
• Internet Archives

My choice: Dave Bass’s rand().to_s() trick

Dave Bass proposed this which I picked up for my implementation (here for an 8-chars token):

shtakai

def fizz_buzz_1(max)
  arr = []
  (1..max).each do |n|
    if ((n % 3 == 0) && (n % 5 == 0))
      arr << "FizzBuzz"
    elsif (n % 3 == 0)
      arr << "Fizz"
    elsif (n % 5 == 0)
      arr << "Buzz"
    else

shtakai

Tips for Money Related Arithmetic in Ruby

1. Never use float for performing arithmetic calculations relating to money.

   Floating numbers can sometimes show funky behaviour. It is not Ruby’s fault but the very implementation of floating numbers raises precision issues.

Examples of odd behaviour:

shtakai

With options -e, -n, -p, perl can do what grep/awk/sed can, what about ruby?

Let's take the result of ls -l as input and process it with ruby

grep with ruby

\ls -l | ruby -ne 'print if /^d/'

awk with ruby

\ls -l | ruby -ne 'puts split(/\s+/).last if /^d/'

shtakai

RSpec.configure do |config|
  config.before(:all, &:silence_output)
  config.after(:all, &:enable_output)
end

# Redirects stderr and stdout to /dev/null.
def silence_output
  @orig_stderr = $stderr
  @orig_stdout = $stdout

shtakai

Just

r Module

shtakai

arr1 = [[1, 2, [3, 4], 5], 6]
arr2 = [[1, 2], 3]
arr3 = [1, [2]]
arr4 = [[1], 2]
arr5 = ["this", ["is", "that", ["Sushi"]], "car"]
arr6 = [["this"], ["is", "that", ["Sushi"]], "car"]


def flat_arr(arr, new_arr=[])

shtakai

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console