zcaceres

How to Eyeball Your ‘This’ Context in Javascript

by zach.dev

The early programmer struggles with the Javascript keyword this. But understanding your this context is easier than it seems.

This is all about where a function is invoked. Often, early programmers worry about where the function was declared. Perhaps the function was declared in a specific file or a particular object. Surely this changes it's this!

Nope.

namuol

rage-quit support for bash

HOW TO INSTALL

Put flip somewhere in your $PATH and chmod a+x it.

Copy fuck into ~/.bashrc.

jonah-williams

test:
  override:
    - bundle exec rspec spec

deployment:
  acceptance:
    branch: master
    commands:
      - ./script/heroku_deploy.sh <ACCEPTANCE_HEROKU_APP>:
          timeout: 300

perplexes

Buildpacks

Heroku uses buildpacks to compile your application into a slug that is used across dynos for scaling horizontally quickly. A slug is a tar.gz archive of your app’s repository with certain pre-deploy features baked into the filesystem. Since everything to run your application is included in the archive, scaling becomes a simple matter of transferring it to a dyno, unpacking, and running the appropriate process. This is how Heroku achieves scaling-by-moving-a-slider.

For example, the Ruby buildpack will:

• install ruby locally
• install the jvm/jruby (if you’re using it)
• install/run bundler and install your gems to Rails.root/vendor
• create your database.yml (which ends up reading from your app’s environment variables)

yellow5

namespace :model_record_updates do
  desc 'Convert all datetimes to UTC values'
  task :convert_datetime_to_utc => :environment do
    puts "Environment: #{Rails.env}\n\n\n"

    #
    # This should be run only once, since it will adjust the database values every time it is run!
    #

    adjust_by   = '+05:00' # How much to alter datetime value by. This is case-by-case, and mine was CST!

dhh

class ActionDispatch::Routing::Mapper
  def draw(routes_name)
    instance_eval(File.read(Rails.root.join("config/routes/#{routes_name}.rb")))
  end
end

BCX::Application.routes.draw do
  draw :api
  draw :account
  draw :session

mislav

burke

ruby-1.9.3-p327 cumulative performance patch for rbenv

This installs a patched ruby 1.9.3-p327 with various performance improvements and a backported COW-friendly GC, all courtesy of funny-falcon.

Requirements

• rbenv
• ruby-build

You will also need a C Compiler. If you're on Linux, you probably already have one or know how to install one. On OS X, you should install XCode, and brew install autoconf using homebrew.

tenderlove

Fibur

Fibur is a library that allows concurrency during Ruby I/O operations without needing to make use of callback systems. Traditionally in Ruby, to achieve concurrency during blocking I/O operations, programmers would make use of Fibers and callbacks. Fibur eliminates the need for wrapping your I/O calls with Fibers and a callback. It allows you to write your blocking I/O calls the way you normally would, and still have concurrent execution during those I/O calls.

Example

Say you have a method that fetches data from a network resource:

ahoward

#! /usr/bin/env ruby

# ClassMethods/InstanceMethods as modules are nice.  but procs are mo betta.  you can't do any of the following via modules.
#

module M
  ClassMethods = proc do
    class << self
      alias_method 'bar', 'foo'
    end