Live Free: Open Source Software indexes

1. OS Living - Great index, cut into categories.
2. Wikipedia - List of free open source software.
3. OpenSourceList - Anthoer category based list, some of the stuff here are Close Source, but still free to use.
4. 50 Apps to manage your Office with open source - This list consists over linux based programs, but i think that Ubunut is anyway the number #1 replacement for windows in offices (except mine where everyone got a mac, haha).
5. 5 Business free applications - why pink?! :)
   

140 Characters Web applications

This is a nice one. i came across this Final wrap-up of The 140 Characters Webapp Challenge and got curious, "What kind of application most people will try to do?".
I guess it right, you too i guess. "Twitter".

Startup Thoughts: Realty and a Dream

Everyone wants to be a big bad rock star entrepreneur, wake up to that morning when your bank account is flooded by plain cold cash, you are making millions while sitting at home and watching the download meter of your software or user count of your web site flying sky high every day.
Well, it's possible, many people have done that, and the nice thing about the web/internet world, is that there will be always, always, enough to share.
But it's a long way, and as the nature of things that take long, they tend to break our spirit, get us bored and insecure and afraid of competition.
I have gathered around a few misconceptions about startups and entrepreneurship, misconceptions that most people around this business seems to posses, but those who won't, these are the ones who break forward.

Misconception #1 - "Fast, Fast, Fast"
Well, shortly.. NO!
Nothing is more important than keeping your startup organized, Clear and planned ahead. Programming fast does not guarantee a better product, Designing, looking around a bit and gathering the baseline on which your consist your product, does guarantee a better product.
Get yourself a clear milestone plan, point out Alpha version (Standalone POC), private beta (for users you self pick) and a public beta, and stick with this plan!.


Misconception #2 - "We'll grow with it"
Scaling... people seem to forget about it, more like avoid it until the "twitter/dzone/digg affect" hit's their home page.
Web application tend to collect more users in a period of time than a downloaded software, web applications are also a single point of service (in case of SaaS), so you'd better get your system infrastructure ready and available for a user boost one day or another, viral marketing can be a dangerous thing.

Misconception #3 - "I've had enough"
i've heard people say "if this project doesn't go public in 5 months, i am out" or "i can't work with this people, i'm out". There's a word for people like that.
quitters.
and quitters don't get rich.
The people you work with may be annoying as hell, stupid as hell or useless as hell, if you truly believe in the concept of the idea, don't let anyone else's negligence to take what is yours and do everything you can (and you ALWAYS can) to get the startup up and running.

Misconception #4 - "We need more money"
Sometimes you do, sometimes you don't.
In order to get a website up and running these days, ready and eager to handle thousands of users, you only need AWS, which if you exaggerate like hell with your configuration, you'll get to 1000$ a month.
So following my previous post, you should know that one or more of your partners must be able to supply you with technical solutions (system administration, coding) so this should almost never be counted as an expense.
Most of the most successful startups were not founded, ever. keep that in mind.

Rails Conditional Eager Loading

Rails's eager loading (ScreenCast) is an important practice that saves some requests and queries when dealing with table relations in rails.
Up until now, using a condition hash to specify query was a little tricky if you use the eager loading method:
User.find(:all, :include => :jobs, :conditions => ["jobs.salary > ?",1000])

or using a hash (without eager loading)
User.find(:all, :conditions => {:name => 'eizesus'})

Using a conditions array/hash isn’t always my favorite way to write finds in Rails, but in certain cases must have when you deal with complex queries (like and "Advanced Search" feature).

In my current work,I needed to run conditions on an associated table in just such an "Advanced search" feature, so i came up with this simple and easy way to use a condition hash for eager loading methods:
User.find(:all, :include => :jobs, :conditions => {:name => 'eizesus', :jobs => {:position => 'Manager'})


or you can prepare the condition hash on the fly:
conditions = {}
conditions[:first_name] = params[:first_name] unless params[:first_name].blank?
conditions[:last_name] = params[:last_name] unless params[:last_name].blank?
conditions[:jobs] = {:position => params[:position]} unless params[:position].blank?

@users = User.find(:all, :conditions => conditions, :include => :jobs)


2 Useful CSS tips

"Don't look for water when something burns, just don't play with fire" - My Mom.

Preventing bugs before they happen, that's the key.
If you don’t prevent bug, they will start a snow ball that will force you on and on with ridiculous patch-work and what i basically call the "fire extinguishing loop", there will be a lot of them interacting with each other, making it difficult to figure out what’s what, and were it all began from.
The majority of bugs reside in JS differences between browsers and CSS and DOM interpretation, so i'll try to specify some methods and techniques we use here at my company, who make our lives a lot more easier.

CSS Resets

asterisk CSS selector:

* {margin: 0; padding: 0;}

But, it's too rough. Using this technique cause my forms to get messy and got me upset since i had to define every single padding and margin specification.
ince then, I’ve been using the popular CSS reset by Eric Meyer, which collects a set of such reset attributes, for several common HTML tags.
Of course i had to tweak it to fully match my needs, but still , it's a must-have baseline for cross browser CSS development.

Clearing floats

IE6 does not like floats too much, IE8RC1 is not a big fan either, especially when those floats are not clear.
Uncleared floats are often the cause of major bugs. however, it’s a bug that is easy to fix.
Setting an HR element with width of %1 and setting it to clear:both, will solve the problem.
<div id="container">
  <div class="floater">
    floating.
  </div>
  <div class="floater">
    floating.
  </div>
  <hr class="clear"/>
</div>
<span>I am below!!</span>

and the CSS:
#container{
}
.floater{float:left, width:60px; margin:6px; padding:6px; border:2px solid #888;}
hr.clear{clear:both;width:1%;}


ther clear:both definition orders the HR element to go down one line if the is any other element on it's left or on it's right, read more on the clear CSS attribute.

Deploying Ruby on Rails on EC2 - Deploying Oracle

Well, generally i use Oracle for my large scale applications.
Some people might say that it's not too-competible with Rails, but using the oracle_enhanced_adapter didn't pop up any special issues (it even supports Oracle's bind variables technique).
The Oracle Cloud Deployment tutorials on Oracle's website contains explanations, PDFs, tutorials and demos on how and when to deploy Oracle DB in the cloud.
Extra guides include backup and recovery practices.

Tools of the Trade: Web development tools list

Well, it's not mine, but it's great.
Dion Almaer's Web resources page includes a shiny list of web resources/tools/tips he uses when developing web applications (on PHP though, baaah.).
He indicates that some of the links are outdated, but promises to fix it. as soon as possible.

All Browsers Online Preview

Great tool, shows you how your website looks in many browsers and OS's, including screen shots.
Visit at browsershots.org

NETTUTS: JQuery for beginners

http://nettuts.com/articles/web-roundups/jquery-for-absolute-beginners-video-series/
great great tutorial, although i am (currently) a MooTools fan, i think this is a very good guide collection for JQuery.

NETTUS: Best tutorial of 2008

NETTUS just published a great tutorial roundup for 2008.
Great web development resource.

Ajaxian: YQL - converting the web to JSON with mock SQL

Yahoo! now enables us to query a web page just like we would in sql. give it a try at YQL - converting the web to JSON with mock SQL

attachment_fu and minimagick resize bug

In one of my latest projects i was using the attachement_fu plugin to handle image uploads.
The attachement_fu plugin enables the option to select an image processor engine between ImageScience, Rmagick add MiniMagick:

1. Rmagick
   Kinda bulky, leaking but fully functional
   
2. MiniMagick
   Simple version of Rmagick, simple and small.
3. ImageSceince
   Small, nice, and quick.

i decided to use MiniMagick as my processor, i installed the gem:

 sudo gem install mini_magick

and added a specific :processor option to my Logo model.

has_attachment :content_type => :image, 
                   :storage => :file_system, 
                   :max_size => 2.megabytes,
                   :resize_to => 'x100',
                   :processor => :mini_magick

but when i was uploading an image, i was was expecting it to be resized based on the options i specified in the model. imagine how surprised i was when i found out that the image is not being resized.

checking the log found the following error:

Exception working with image: ImageMagick command (identify "/var/folders/Bv/Bvbna8-OH548ZWju8naF4U+++TI/-Tmp-/minimagick11451-0") failed: Error Given 32512

Googling it didn't help me much (except from finding other people with the same problem), so i decided to switch to ImageScience instead (RMagick is out of the question of course).

 sudo gem install image_science

this will include all most all dependencies, the freeImage dependency is also needed.
us mac/darwin users can simply use port:

  sudo port selfupdate
  sudo port install freeimage

now change the processor in the model

has_attachment :content_type => :image, 
                   :storage => :file_system, 
                   :max_size => 2.megabytes,
                   :resize_to => 'x100',
                   :processor => :image_science

and now it's working. yeah!.

Skype Weblinks - Call a skype user or send an IM message in a html page

When the user has installed Skype, one can open Skype directly from a webpage. The protocol is skype:skypename - and some other optional flags.

The example will use my skype username, but i am sure you will be able to get the hang of it.

Call a skype user
The optional flag is call - to force Skype to call somebody. It can also be left out - but if the user changed the default behavior to e.g. chat - Skype will open an IM session instead. So - go the save way and use the call - flag.

Example: call a Skype user

<a href="skype:eladmeidar?call">Call</a>

Send an Skype IM message to a Skype user

The optional flag is chat. See the example below to see the usage in a html page.
Example: send a chat message to a Skype user

<a href="skype:eladmeidar?chat">Chat</a>

Send a voicemail to a Skype user
The optional flag is voicemail - as you might have guessed.
Example: send a voicemail to Skype user

<a href="skype:eladmeidar?voicemail">Voice mail</a>

Create a Skype conference call with multiple users
This is as easy as the examples above - just more usernames before the "?" and call as flag.
Example: create a Skype conference call

<a href="skype:eladmeidar;otherfriend123?call">call 2 friends</a>

Create a conference chat with multiple users
Same as conference call - with chat as flag.
Example: open a conference chat with multiple users - in html

<a href="skype:eladmeidar;otherfriend123?chat">Chat with 2 friends </a>

i am now working on a rails plugin to implement this automated use for Rails applications

Rails date Range

Holy Shmoly! Sometimes Rails and ruby just blows me away,

Let’s assume you are trying to find a bunch of records between a time frame.

  class Call < ActiveRecord::Base
    named_scope :by_month, lambda { |d| { :conditions  => { :date  => d.beginning_of_month..d.end_of_month } } }
  end

simply specify a range

and running (the named_scope )

  this_months_calls = Call.by_month Date.today

And Rails will return all the calls that were recorded during the current month. Love it.

goosh.org: a Google Command Line!

http://goosh.org/ is a command line interface for Google and some other related services such as wikipedia and YouTube.
Goosh (Google Shell) is a google-interface that behaves similar to a unix-shell.
You type commands and the results are shown on this page.
goosh was written by Stefan Grothkopp <grothkopp@gmail.com>
it is NOT an official google product!

CSS Graphs Helper for Ruby on Rails

source: http://nubyonrails.com/pages/css_graphs
A Ruby on Rails helper for making simple graphs. The graphs use only CSS/HTML (and an optional gradient image).
Vertical bar graphs, horizontal bar graphs, and complex bar graphs with an image marker.



Install:

./script/plugin install http://topfunky.net/svn/plugins/css_graphs

Generate:

# No arguments are needed
./script/generate css_graphs

Examples:



Find out more on the source @ Nuby on Rails

Common RJS mistake/error on Ruby on Rails

When you use some of your ajax helpers, such as link_to_remote, with the :update parameter in order to update a specific DOM element AND you specify page.replace_html or any other RJS syntax that handles other DOM ID, it will return the result expected, nothing will be updated on the :update pointer DOM ID.

Simply choose one, if you use :update, return an html or render a partial in your action instead of rendering RJS.
If you require multiple changes, use RJS and no :update parameter.

Google Gmail search tokens

The amazingly simple search within Gmail (Google Apps) enables the option to specify a token in order to make your life a little easier.

Operator	Definition	Example(s)
from:	Used to specify the sender	Example - from:elad Meaning - Messages from Amy
to:	Used to specify a recipient	Example - to:elad Meaning - All messages that were sent to David (by you or someone else)
subject:	Search for words in the subject line	Example - subject:dinner Meaning - Messages that have the word "dinner" in the subject
OR	Search for messages matching term A or term B* *OR must be in all caps	Example - from:amy OR from:david Meaning - Messages from Amy or from David
- (hyphen)	Used to exclude messages from your search	Example - dinner -movie Meaning - Messages that contain the word "dinner" but do not contain the word "movie"
label:	Search for messages by label* *There isn't a search operator for unlabeled messages	Example - from:amy label:friends Meaning - Messages from Amy that have the label "friends" Example - from:david label:my-family Meaning - Messages from David that have the label "My Family"
has:attachment	Search for messages with an attachment	Example - from:david has:attachment Meaning - Messages from David that have an attachment
list:	Search for messages on mailing lists	Example - list:info@example.com Meaning - Messages with the words info@example.com in the headers, sent to or from this list
filename:	Search for an attachment by name or type	Example - filename:physicshomework.txt Meaning - Messages with an attachment named "physicshomework.txt" Example - label:work filename:pdf Meaning - Messages labeled "work" that also have a PDF file as an attachment
" " (quotes)	Used to search for an exact phrase* *Capitalization isn't taken into consideration	Example - "i'm feeling lucky" Meaning - Messages containing the phrase "i'm feeling lucky" or "I'm feeling lucky" Example - subject:"dinner and a movie" Meaning - Messages containing the phrase "dinner and a movie" in the subject
( )	Used to group words Used to specify terms that shouldn't be excluded	Example - from:amy(dinner OR movie) Meaning - Messages from Amy that contain either the word "dinner" or the word "movie" Example - subject:(dinner movie) Meaning - Messages in which the subject contains both the word "dinner" and the word "movie"
in:anywhere	Search for messages anywhere in Gmail* *Messages in Spam and Trash are excluded from searches by default	Example - in:anywhere movie Meaning - Messages in All Mail, Spam, and Trash that contain the word "movie"
in:inbox in:trash in:spam	Search for messages in Inbox, Trash, or Spam	Example - in:trash from:amy Meaning - Messages from Amy that are in Trash
is:starred is:unread is:read	Search for messages that are starred, unread or read	Example - is:read is:starred from:David Meaning - Messages from David that have been read and are marked with a star
cc: bcc:	Used to specify recipients in the cc: or bcc: fields* *Search on bcc: cannot retrieve messages on which you were blind carbon copied	Example - cc:david Meaning - Messages that were cc-ed to David
after: before:	Search for messages sent during a certain period of time* *Dates must be in yyyy/mm/dd format.	Example - after:2004/04/16 before:2004/04/18 Meaning - Messages sent between April 16, 2004 and April 18, 2004.* *More precisely: Messages sent after 12:00 AM (or 00:00) April 16, 2004 and before April 18, 2004.
is:chat	Search for chat messages	Example - is:chat monkey Meaning - Any chat message including the word "monkey".

Ruby on Rails and Oracle on Mac Os Leopard

Overview

The nightmare is over.
Just until the latest Oracle libraries update (finally released a X86 library pack for mac) it was nesecerry to use 2 versions of ruby, a universal and a ppc version. Sadly, when running PPC, the benchmarking were terrible and it had some very annoying freezes and other stuff that would simple make you want to jump off the roof.
BUT! (:) ) times had changed, Oracle (as mentioned) released an X86 Intel compatible library pack for MacOs users and therefore ended my misery,
Woohoo! That makes the entire process of connection Ruby on Rails and oracle on Leopard about as 100 times less complicated than before, so I’ve posted it here to let everyone enjoy.
I assumes that you’re using Rails 2.0 or greater (Why not really?).

IMPORTART!!!

If you already connected Oracle and Ruby on Rails using the old way, please preform the "Cleanup" step first.

Oracle Libraries

The new Intel Mac versions are available from the Oracle downloads site. Install them in /Library/Oracle/.
You can do side-by-side installations in folders with whatever names you want, since apps find them by using the $ORACLE_HOME environment variable (and it’s friends). I’ve got mine in /Library/Oracle/instantclient_10_2.
Also make sure that you’ve got the files required to run sqlplus and the sdk along with the basic. You can drop those in the same directory.

Symlink the libraries

In the directory where you’ve installed the instant client, run this:

ln -s libclntsh.dylib.10.1 libclntsh.dylib

Set the environment variables correctly

You’ll probably want to put these lines in your /etc/profile , but they also must be run from the command line to take effect (you can also "source /etc/profile"):

export ORACLE_HOME=/Library/Oracle/instantclient_10_2 <= Change to your library!
export TNS_ADMIN=$ORACLE_HOME
export LD_LIBRARY_PATH=$ORACLE_HOME
export DYLD_LIBRARY_PATH=$ORACLE_HOME
export PATH=$PATH:$ORACLE_HOME

Oracle! giddie up!

First you'll need to install the Active Record Oracle adapter,

sudo gem install activerecord-oracle-adapter --source http://gems.rubyonrails.org

which is how ActiveRecord deals with Oracle.
It doesn’t, however, install the Ruby oci8 driver, which is how Ruby talks to Oracle (yeah, annoying).

Important!!!

Have you installed the Oracle Instant Client SDK ?
good.


Get the lastest the oci8 library. Download it and unpack the file in the finder: it should unzip into ~/Downloads/ruby-oci8-x.x.x.

Now we can finish configuring the environment before we compile the library.

cd ~/Downloads/ruby-oci8-x.x.x
export SQLPATH=$ORACLE_HOME
export RC_ARCHS=i386
ruby setup.rb config
make
sudo make install

oh joy, scrolling lines of doom will pass in front of you and hopefully you'll see no errors and burst into tears.

Show me!

At this point, we’re almost done. Let's see it working.

irb
require 'oci8'
==> true

or

irb
require 'rubygems'
==> []
require 'oci8'
==> true

Configure your database.yml

In your database.yml, use the following to make it work:

development:
adapter: oracle
database: your_instance_name
username: your_user_name
password: your_password

The database name = > comes straight out of your tnsnames.ora file. You don’t need to specify any other connection information in database.yml, since the tnsnames.ora file has everything you need.

if you are using the oracle Express edition, it should look something like that.

development:
  adapter: oci
  host: //db_hostname:db_port/xe <== Oracle port is usually 1521
  username: username
  password: password
  cursor_sharing: similar
  prefetch_rows: 100

note: last 2 lines are some tweaking for a better Oracle performance.

Cleanup: Fix the ruby_fat and ruby_ppc setup

if you have installed Oracle libraries using the old way, you'll be happy to remove the mess it made out of your ruby installation and happily, it’s quite simple.
Just remove the ruby_ppc files, and the symlinks to them (called ruby, and rename ruby_fat as ruby:

cd /usr/bin <== or wherever you put them.
sudo rm ruby
sudo rm ruby_ppc
sudo mv ruby_fat ruby

and

cd /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin
sudo rm ruby
sudo rm ruby_ppc
sudo mv ruby_fat ruby

Then, you should also remove the 2 management scripts:

sudo rm /usr/bin/ppc_ruby.sh
sudo rm /usr/bin/fat_ruby.sh

And that’s enough for the cleanup.

TextMate Bundle of Bundles: getBundle

From Macroomates
There are 124 bundles for TextMate where only 36 are included by default. Until recently, the way to get more bundles has been to install subversion and then do a checkout of the bundles needed (from the shell.) or download a .tmbundle file.

Now there is a much easier way: the GetBundle bundle by Sebastian Gräßl. All you need to do is download and double click it to get an “Install Bundle” command which you can invoke from inside TextMate (hint: use ⌃⌘T and enter “install”.)

There is also an “Update all Bundles” command which you can use to update your custom installed bundles to the latest version. A future version of the bundle is likely to offer a launchd Daemon that you can install to have updating taken care of automatically.

All bundles installed via the GetBundle end up in ~/Library/Application Support/TextMate/Pristine Copy/Bundles.


Get it here, since the original repo isn't working.