empijei

package csrf

import "errors"

// This is just an example on how to reduce redundant code in Go
// Original file: https://github.com/gofiber/csrf/blob/dde96da6711a2cc01709a66730c2e16328b22047/main.go

// csrfFromExtractor returns a function can be used to bind to a parameter name to extract a csrf token from a Ctx.
func csrfFromExtractor(errMessage string, extractor func(c *fiber.Ctx, param string) string) func(string) func(c *fiber.Ctx) (string, error) {
	return func(param string) func(c *fiber.Ctx) (string, error) {

ProGM

Arel Cheatsheet on Steroids

A (more) complete cheatsheet for Arel, including NamedFunction functions, raw SQL and window functions.

Tables

posts = Arel::Table.new(:posts)
posts = Post.arel_table # ActiveRecord

Table alias

rushilgupta

INTRO

Concurrency is a domain I have wanted to explore for a long time because the locks and the race conditions have always intimidated me. I recall somebody suggesting concurrency patterns in golang because they said "you share the data and not the variables".

Amused by that, I searched for "concurrency in golang" and bumped into this awesome slide by Rob Pike: https://talks.golang.org/2012/waza.slide#1 which does a great job of explaining channels, concurrency patterns and a mini-architecture of load-balancer (also explains the above one-liner).

Let's dig in:

Goroutines

bastman

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

dhh

# Original Rails controller and action
class EmployeesController < ApplicationController
  def create
    @employee = Employee.new(employee_params)
    
    if @employee.save
      redirect_to @employee, notice: "Employee #{@employee.name} created"
    else
      render :new
    end

bokmann

# Thee will be more information here when I share the entire problem space I'm working on, but
# in short, this is preview material for my second talk in a series called "What Computer Scientists Know".
# The first talk is on recursion, and goes through several examples., leading up to a problem based
# on a simple puzzle that initial estimates based on performance of a previous puzzle would take years
# to solve on modern computers with the techniques shown in Ruby. That sets the stage for improving the
# performance of that problem with threading, concurrency, and related tuning.
#
# The second talk is on threading and concurrency, touching on algorithmic performance as well.
# Using some knowledge of the problem (board symmetry, illegal moves, etc), we reduce the problem space
# to about .5% of what we initially thought it was.  Still, the initial single threaded solution took more

rafer

# coding: utf-8

# Can ruby have method names have newlines/be crazy?

class BadKitty
  FACE = "
    |\\_/|
   / @ @ \\
  ( > º < )
   `>>x<<´

bkeepers

def dress(dog_or_dogs)
  dressed_dogs = Array(dog_or_dogs).map {|dog| DogSweater.new(dog) }
  dog_or_dogs.respond_to?(:each) ? dressed_dogs : dressed_dogs.first
end

one_dog = dress(Dog.new)
all_my_dogs = dress([Dog.new, Dog.new, Dog.new])

jcoglan

require 'json'

class JsonFormatter
  METHODS = %w[start close stop start_dump dump_pending dump_failures dump_summary]
  METHODS.each { |m| define_method(m) { |*a| } }

  def initialize(out)
    @output    = out
    @event_id  = 0
    @passed    = true

dqminh

require "rspec/core/formatters/progress_formatter"

class ApplauseFormatter < RSpec::Core::Formatters::ProgressFormatter
  def initialize(output)
    super(output)
    unless File.exists? "/tmp/applause.mp3"
      p "Downloading applause for awesomeness"
      system "wget http://www.soundjay.com/human/applause-1.mp3 -O /tmp/applause.mp3"
    end
  end