dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

rgs

Falsehoods programmers believe about prices

1. You can store a price in a floating point variable.
2. All currencies are subdivided in 1/100th units (like US dollar/cents, euro/eurocents etc.).
3. All currencies are subdivided in decimal units (like dinar/fils)
4. All currencies currently in circulation are subdivided in decimal units. (to exclude shillings, pennies) (counter-example: MGA)
5. All currencies are subdivided. (counter-examples: KRW, COP, JPY... Or subdivisions can be deprecated.)
6. Prices can't have more precision than the smaller sub-unit of the currency. (e.g. gas prices)
7. For any currency you can have a price of 1. (ZWL)
8. Every country has its own currency. (EUR is the best example, but also Franc CFA, etc.)

MarceloCajueiro

queue = Sidekiq::Queue.new("default")

queue.each do |job|
  if job.klass == "DailyFrequencyCreatorWorker"
    DailyFrequencyCreatorWorker.set(queue: 'daily_frequency_creator').perform_async(*job.args)

    job.delete
  end
end;nil

zakariaf

Rails 7 new features. Before and After

• Add ComparisonValidator
• PostgreSQL generated columns
• PostgreSQL custom enum types
• Add tracking of belongs_to association
• association_previously_changed? method
• Add invert_where method
• Add associated method
• Add missing method
• Active Record Encryption

O-I

One of the many reasons I love working with Ruby is it has a rich vocabulary that allows you to accomplish your goals with a minimal amount of code. If there isn't a method that does exactly what you want, it's usually possible to build an elegant solution yourself.

Let's take the example of simulating the rolling of a die.

We can represent a die as an array of its faces.

die = [*?⚀..?⚅]
# => ["⚀", "⚁", "⚂", "⚃", "⚄", "⚅"]

alassek

I've been doing some work lately with JSON documents in PostgreSQL using jsonb columns. You can query these documents using a GIN index in PG, but the syntax can be a little cumbersome

SELECT "events".* FROM "events" WHERE "events"."body" @> '{"shift":{"user_id":2}}'

You have to construct the right side of the query as a JSON string, which is a bit annoying. So I wondered if I could adapt Arel to do the tedious stuff for me.

olivierlacan

• http://david.heinemeierhansson.com/2014/tdd-is-dead-long-live-testing.html
• http://blog.8thlight.com/uncle-bob/2014/04/25/MonogamousTDD.html
• http://david.heinemeierhansson.com/2014/test-induced-design-damage.html
• http://blog.8thlight.com/uncle-bob/2014/05/01/Design-Damage.html
• http://david.heinemeierhansson.com/2014/slow-database-test-fallacy.html
• http://blog.8thlight.com/uncle-bob/2014/04/30/When-tdd-does-not-work.html
• https://www.destroyallsoftware.com/blog/2014/tdd-straw-men-and-rhetoric
• http://articles.coreyhaines.com/posts/active-record-spec-helper/
• http://martinfowler.com/bliki/UnitTest.html

sunny

# encoding: UTF-8
#
#     $ rake checkout new_branch_name
#
# Via https://gist.github.com/jonlemmon/4076864
#
# 1. Roll back any migrations on your current branch which do not exist on the
#    other branch
# 2. Discard any changes to the db/schema.rb file
# 3. Check out the other branch

frahugo

RouteTranslator gem is wrapping the current locale assignment in an around_filter set_locale_from_url and then resets it to the previous value.

Devise has a FailureApp to deal with unauthenticated requests, and it uses I18n to build the flash message and the redirection URL. But at that stage, the I18n default locale is set and the messages and URL are not localized in the context of the request (i.e. if the request URL is in French, and the default locale of the app is English, Devise will redirect to the English URL with an english flash message).

This is a solution for propagating the application locale to the the Devise middleware.

mislav

#!/bin/bash
# Usage: gh-rename-master <newbranch> [<remote>]
#
# Renames the "master" branch of the current repository both locally and on GitHub.
#
# dependencies: GitHub CLI v0.10
set -e

newbranch="${1?}"
remote="${2:-origin}"