Igor Zubkov biow0lf

Instachat

The Phoenix Framework was built with realtime communication as a first class priority. Using its built in socket handling and channels we can implement a basic, realtime chat application with little effort.

For this video we’re going to assume that you already have Elixir and Phoenix Setup. You will not need a database as the messages will not be persisted. This tutorial is taken pretty much directly from the Phoenix Documentation.

Setting up the app

To start let’s generate a standard phoenix application:

$> mix phoenix.new instachat

Finding a Ruby memory leak using a time analysis

When developing a program in Ruby, you may sometimes encounter a memory leak. For a while now, Ruby has a facility to gather information about what objects are laying around: ObjectSpace.

There are several approaches one can take to debug a leak. This discusses a time-based approach, where a full memory dump is generated every, say, 5 minutes, during a time that the memory leak is showing up. Afterwards, one can look at all the objects, and find out which ones are staying around, causing the

Английская версия: https://evilmartians.com/chronicles/bootstrap-an-intervention

Вводная часть

У CSS есть несколько базовых проблем, которые позволяют очень быстро отстрелить себе ногу при неправильном использовании:

Глобальный неймспейс – в серверном программировании все что написано в файле, в файле и остается. Все же что написано в css и js засирает глобальное пространство имен со всеми вытекающими. В JS эту проблему сейчас побороли всякими модульными системами, а вот с css сложнее. В идеальном мире это должен починить Shadow DOM и настоящие Web Components, но пока их нет единственный способ с этим бороться – следовать какой-то системе именований селекторов, которая по возможности уменьшает и исключает возможные конфликты.
Каскадность – если на один элемент может сработать несколько правил, то они все и сработают последовательно. Если есть элемент h1.title, на него сработают все правила для тегов h1 и все правила для класса .title. Так как весь html состоит из тегов, то правил которые п

Firefox bullshit removal

Updated: Just use qutebrowser (and disable javascript). The web is done for.

When should you use DateTime and when should you use Time?

It's a common misconception that [William Shakespeare][1] and [Miguel de Cervantes][2] died on the same day in history - so much so that UNESCO named April 23 as [World Book Day because of this fact][3]. However because England hadn't yet adopted [Gregorian Calendar Reform][4] (and wouldn't until [1752][5]) their deaths are actually 10 days apart. Since Ruby's Time class implements a [proleptic Gregorian calendar][6] and has no concept of calendar reform then there's no way to express this. This is where DateTime steps in:

>> shakespeare = DateTime.iso8601('1616-04-23', Date::ENGLAND)
=> Tue, 23 Apr 1616 00:00:00 +0000
>> cervantes = DateTime.iso8601('1616-04-23', Date::ITALY)
=> Sat, 23 Apr 1616 00:00:00 +0000

	#!/usr/bin/env bash

	git ls-files db/migrate/*.rb \| sort \| tail -1 \| \
	ruby -e "schema_version=STDIN.read[/\d+/]; init_schema=%(db/migrate/#{schema_version}_init_schema.rb);
	%x(git rm -f db/migrate/*.rb;
	mkdir db/migrate;
	git mv db/schema.rb #{init_schema};
	rake db:migrate;
	git add db/schema.rb; git commit -m 'Squashed migrations')"

	* {
	font-size: 12pt;
	font-family: monospace;
	font-weight: normal;
	font-style: normal;
	text-decoration: none;
	color: black;
	cursor: default;
	}

	#!/usr/bin/env ruby

	# If you get "unknown OID 705: failed to recognize type of '<field>'. It will be treated as String."
	# it probably means that type of column could not be identified when retriving records

	# Example
	User.where("'something' as something")

	# Will results in unknown OID. However doing this:

	Homebrew build logs for git on OS X 10.7.5
	Build date: 2015-12-31 03:42:37

	source "https://rubygems.org"

	gem "rspec", ">= 3.5.0.beta2"