Konstantin Ivanov logrusorgru

Rails - How to check for online users? Redis.

Init Redis

   # config/initializers/redis.rb
    
   $redis_onlines = Redis.new
   # it's the simplest way, but i'd recommend:
   # $redis_onlines = Redis.new path: "/tmp/redis.sock", db: 15, driver: :hiredis

Rails 3

has_many  :active_events, :through => :event_users, 
          :class_name => "Event", 
          :source => :event, 
          :conditions => ['event_users.active = ?',true]

Rails 4

Nokogiri does not understand the dollar sign `$` in selectors.

Some example:

require 'nokogiri'

html = %Q{
  <!DOCTYPE html>

ActiveRecord Serialize

serialize :column, JSON realy faster then standart YAML serialize

Small benchmark

class Some &lt; ActiveRecord:Base

Colorized Golang output

Get package from here

// import "golorize"

fmt.Println( golorize.Red("[FAIL] Some Errors Occurred") )

	all: clean build run

	build:
	gcc -nostdlib -Wall -shared -fPIC hello_exit.S -Wl,-soname,libhelloexit.so.1 -o libhelloexit.so.1.0
	ln -sv libhelloexit.so.1.0 libhelloexit.so.1
	ln -sv libhelloexit.so.1.0 libhelloexit.so
	gcc -nostdlib -Wall -L. -I. hello.c -lhelloexit -Wl,-rpath,. -o hello
	@echo Done

	run:

	/*

	// Creates a router without any middleware by default
	r := gin.New()

	r.Use(gin.Recovery())
	r.Use(logger.Logger()) // use this logger without colors

	*/
	package logger


	-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
	-- --
	-- mysql --
	-- --
	-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

	--
	-- mysql <http://sqlfiddle.com/#!9/91afb5/2>
	-- note: sqlfiddle is very stupid

	package pool

	import (
	"sync"
	"testing"
	"time"
	)

	// perform:
	// go test -bench syncPool

	%YAML 1.2
	---
	# See http://www.sublimetext.com/docs/3/syntax.html
	file_extensions:
	- S
	scope: source.S
	contexts:
	main:

	# comment multiline

Konstantin Ivanov logrusorgru

Rails - How to check for online users? Redis.

Rails 3

Rails 4

Nokogiri does not understand the dollar sign $ in selectors.

ActiveRecord Serialize

Colorized Golang output

Nokogiri does not understand the dollar sign `$` in selectors.