MyFunnyDev » Uncategorized

javascript closures

Michał Kuklis — Fri, 25 Jun 2010 05:37:54 +0000

For given content:

  <div id="test0">change mediv>
  <div id="test1">change mediv>
  <div id="test2">change mediv>
  <div id="test3">change mediv>

The code:

 for (var i = 0; i < 4; i++) {
   $('#test' + i).click(function(){
     $(this).html(i);
   });
}

will print (every time any of the elements is clicked):

Here is how this could be solved with the closure:

  for (var i = 0; i < 4; i++) {
    (function (i){
      $('#test' + i).click(function(){
        $(this).html(i);
      });
    })(i);
  }

managing gems with rvm named gem sets

Michał Kuklis — Mon, 31 May 2010 03:20:44 +0000

RVM (Ruby Version Manager) is a tool which lets you install and switch between multiple ruby versions. RVM has also something called Named Gem Sets. This is pretty cool because you can create many different gem sets for different types of apps. Here is how to do it (I assume you have rvm already installed if not check this out):

go to your project folder and create new file called .rvmrc
open .rvmrc and add rvm ruby-version@your-gem-set for example rvm ruby-1.9.1@railsgems
close file and type: rvm gemset create your-gem-set (this will create new set)
type gem list (you should see empty list with no gems installed)

It’s almost as you would start with a fresh system

dfs in ruby :)

Michał Kuklis — Thu, 14 Jan 2010 05:38:42 +0000

I wrote simple dfs in ruby:

def dfs(node, value, queue)
  return false if node.nil?	
  return true if node.data == value
 
  queue.push node.right unless node.right.nil?
  queue.push node.left unless node.left.nil?	
 
  dfs(queue.pop, value, queue)	
end

for node:

class Node
  attr_accessor :left, :right, :data
end

Academia vs. Business

Michał Kuklis — Wed, 18 Nov 2009 17:05:02 +0000

Gemcutter & Jeweler

Michał Kuklis — Sat, 17 Oct 2009 05:03:47 +0000

More about gemcutter & jeweler can be found here.

Here are the steps how to publish patched gem cloned from github:

1. Append username to gem name in .gemspec or if you use jeweler open Rakefile and edit Jeweler::Tasks section save it and run:

rake gemspec

2. Build gem with:

gem build

3. Push new gem to gemcutter

gem push

BDD with Cucumber by Ben Mabey

Michał Kuklis — Sat, 29 Aug 2009 16:16:33 +0000

auto escaping html in Rails to protect from XSS

Michał Kuklis — Thu, 30 Jul 2009 01:24:02 +0000

Tonight I found a plugin to auto escape html in order to protect from XSS attacks. I’m not sure why rails doesn’t do it out of the box (you have to use h() helper). Anyway the plugin is called xss_terminate and it can be found here. The cool thing about it is that now you can forget about h() .

Cron in Ruby

Michał Kuklis — Mon, 27 Jul 2009 06:10:35 +0000

Check out how Whenever gem can simplify cron configuration.

key-value store

Michał Kuklis — Sun, 26 Jul 2009 15:40:56 +0000

daemon_controller + Thinking Sphinx

Michał Kuklis — Wed, 22 Jul 2009 06:13:02 +0000

I’ve created simple rails initiator in order to start Sphinx through daemon_controller based on the Thinking Sphinx configuration. I hope it will help somebody.

require 'daemon_controller'
 
def before_start
  if not ThinkingSphinx.define_indexes?
    config = ThinkingSphinx::Configuration.instance
    cmd = "#{config.bin_path}#{config.indexer_binary_name} --config \"#{config.config_file}\" --all"
    cmd << " --rotate" if ThinkingSphinx.sphinx_running?
    system cmd
  end
end
 
if defined?(ThinkingSphinx)
  if not ThinkingSphinx.sphinx_running? 
    conf_instance = ThinkingSphinx::Configuration.instance
    @controller = DaemonController.new(
      :identifier => 'Sphinx search server',
      :start_command => "#{conf_instance.bin_path}#{conf_instance.searchd_binary_name} --pidfile --config \"#{conf_instance.config_file}\"",
      :before_start => method(:before_start),
      :ping_command => lambda { TCPSocket.new(conf_instance.configuration.searchd.address, conf_instance.configuration.searchd.port) },
      :pid_file => conf_instance.configuration.searchd.pid_file,
      :log_file => conf_instance.configuration.searchd.log)
      @controller.start
  end
end