The Original Jelani Harris The one and only

if ($.pluginFunction) {
  // Function exists, do your plugin stuff here.
} else {
  // Plugin does not exist, use alternatives or do nothing in here.
}

class Author > ActiveRecord::Base
  has_attached_file :avatar,
    :styles => {
      :thumb => "75x75#",
      :small => "100x100#",
      :medium => "150x150>"
    }
end

class AddAvatarToAuthor > ActiveRecord::Migration
  def self.up
    add_column :author, :avatar_file_name, :string
    add_column :author, :avatar_content_type, :string
    add_column :author, :avatar_file_size, :integer
  end
  def self.down
    remove_column :author, :avatar_file_name
    remove_column :author, :avatar_content_type
    remove_column :author, :avatar_file_size
  end
end

<% form_for :author, :html => {:multipart => true} do |f| %>
  <%= f.label :avatar %><br />
  <%= f.file_field :avatar %>
  <%= f.submit %>
<% end %>

<%= image_tag @author.avatar.url %>
<%= image_tag @author.avatar.url(:thumb) %>

Installing Ruby on Rails 3 in Windows

So last week I got a little tired of having to reboot my computer to dual-boot in a linux environment so that I could work on Rails stuff. Then I decided to try using Rails in Windows. Here's a step by step guide on how to install rails in Windows.

Install Ruby 1.9

To install ruby on our windows machine we will be using RubyInstaller. RubyInstaller is the easiest way to install ruby in windows. It includes the Ruby execution environment and documentation.

First download and install The RubyInstaller.  Installing it to C:\Ruby192 is perfectly fine. I would not recommend installing Ruby to a place that has spaces in it, like the Program Files folder.

From here you can also download the DevKit as well. It allows you to have RubyGems build C-based gems. If you decide to get the DevKit, just install it to the C:\Ruby192\devkit folder for now.

So as you're installing the RubyInstaller, Be sure to select, "Add Ruby Executables to your Path"

Now let's verify that Ruby has been correctly installed. Get to your command prompt (Via Start -> Run -> type in cmd). Then type in:

ruby -v

Then it should reply with something similar to:

ruby 1.9.2p180 (2011-02-18) [i386-mingw32]

Now with your command prompt still open, let's check to see that RubyGems was installed as well:

gem -v

Hey that wasn't so difficult was it? I told you that RubyInstaller was easy

Install SqlLite3

So when running rails we would like to have a database to start off with without having to set up a local database connection. And of course, Windows does not support SqlLite right out of the box. Thus we will have to get it ourselves.

Go to the SQLite download page and find the precompiled binaries for windows section and download the sqlite-dll-win32-x86-3070603.zip

After unzipping that file, you should end up with the files sqlite3.dll and sqlite3.def. Copy both of those files into the C:\Ruby192\bin directory.

Also, while you're still at the SqlLite download page you should pick up the shell file (sqlite-shell-win32-x86-3070603.zip) as well. The command line shell is useful for looking around in your sqlite3 databases. Copy the executable in the zip also to the C:\Ruby192\bin directory. You can verify that this is installed by typing:

sqllite3 -version

Now we should install the ruby bindings to SQLite3

gem install sqlite3

 

Install Rails 3

Rails is distributed by RubyGems. When you install Ruby, the RubyGems system is also installed. This makes it really easy to install Rails.

Install Rails by typing:

gem install rails

This should take a few minutes because it is installing several of the Rails dependencies (ActiveRecord, ActionPack, ActiveSupport, etc).

When that is done installing, verify that the correct version of Rails was installed by typing

rails -v

And it should respond with 3.0.7 or higher

 

Creating a Rails application

Go into your development directory and type in:

rails new project_name

Replace the project_name with the name of your new application. You should see it create a bunch of new directories and files

Now we need to install the gems we are going to use with this project. You can install the gems using:

bundle install

Once those gems are installed, we need to create the sqlite3 database in your project directory by typing in:

rake db:migrate

Once that is done, start your rails server by using the commands

rails server

And then navigate to http://localhost:3000/ to view your application. It should look something similar to this:

 

Now get out there and start working on your web projects!

if ($filepointer = fopen("http://banditrevolvers.com", "r")) {
     $site_content = "";
 
     //While we still have content to read, append it
     //1k at a time
     while ($line = fread($filepointer, 1024) {
          $site_content .= $line;
     }
 
} else {
     //Error occured while trying to read the url
}
 
fclose($filepointer);

if ($filehandle = fopen("http://banditrevolvers.com", 'r') {
 
     while(!feof($filehandle)) {
          $readline = fgets($filehandle, 1024);
          if (eregi("<title>(.*)</title>", $readline, $output) {
               $title = $output[1];
               break;
          }
     }
} else {
     //Error occured while trying to read the url
}
 
echo "Title of the page is: " . $title;
 
fclose($filehandle);

$content = file_get_contents("http://banditrevolvers.com");
 
if ($content !== false) {
     //Do something with the content
} else {
     //An error occurred
}

if (function_exists('curl_init')) {
     //Initialize a new resource for curl
     $ch = curl_init();
 
     //Set the url the retrieve
     curl_setopt($ch, CURLOPT_URL, 'http://banditrevolvers.com');
 
     //Return the value instead of outputting to the browser
     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 
     $contents = curl_exec($ch);
     curl_close($ch);
 
     if ($contents) {
          //Do stuff with the contents
     } else {
          //Show error message
     }
 
}

//These are properties of the MovieClip class
targetMc.buttonMode = true;
targetMc.useHandCursor = true;

import flash.display.MovieClip
 
package com.jelaniharris {
     class ButtonMovieClip extends MovieClip {
          //Override the default constructor and make this movieclip indicate it's a button to the user
          public function ButtonMovieClip (): void {
               this.buttonMode = true;
               this.useHandCursor = true;
          }
     }
}

//Bind this keypress function to all of the input tags
$("input").keypress(function (evt) {
//Deterime where our character code is coming from within the event
var charCode = evt.charCode || evt.keyCode;
if (charCode  == 13) { //Enter key's keycode
return false;
}
});

    foreach ($my_array as $key => $value) {
      //We check to make sure that the value is either null or just an empty string
      if (is_null($value) || $value=="") {
        unset($my_array[$key]);
      }
    }

   //This prunes out 'false', '0', 'null' or ''
   $my_array = array_filter($my_array);

   var my_array = [1,2,3,'4','', 0, null, 'false'];
   function emptyElement(element) {
	//Removes nulls, zeros (also falses), text version of false, and blank element
	if (element == null || element == 0 || element.toString().toLowerCase() == 'false' || element == '')
		return false;
		else return true;
	}
 
	var my_array = [0,'false',1,null, 2,'',3,'4',false];
	my_array = my_array.filter(emptyElement);
   }