• Switch to the screen that you wan to to do screen capture
• Hold down Apple key ⌘ + Shift + 3 and release all
• then use your mouse to click on the screen
• Done. You will see a picture file in at your desktop. That’s the screen capture picture.

You can also do a screen capture for a portion of your screen.

• Switch to the screen that you wan to to do screen capture
• Hold down Apple key ⌘ + Shift + 4 and release all key
• Now, You will see the mouse cursor will change to +
• You can start to drag your mouse to select the portion you wish to capture.
• Once finish, you will see a picture file in at your desktop. That’s the screen capture picture!

If you want to do a screen capture for a particular application window, you can follow this:-

• Switch to the screen that you wan to to do screen capture
• Hold down Apple key ⌘ + Shift + 4 and release all key
• Now, You will see the mouse cursor will change to +
• Press the space bar once
• You will see the mouse cursor change to a camera
• Now you can use the camera to select which application window to screen capture
• Once finish, you will see a picture file in at your desktop. That’s the screen capture picture!

before_filter :find_post, nly => [:show, :edit, :update, :destroy]

where find_post is a private method of the current class and show, edit, update, destroy are the actions for whome find_post will be fired for.

class PostsController < ApplicationController

def show

@post = Post.find(params[:id])

end

def edit

@post = Post.find(params[:id])

end

def update

@post = Post.find(params[:id])

end

def destroy

@post = Post.find(params[:id])

end

end

Four instances of the exact same line of code doesn’t seem very DRY. Rails provides filters as a way to address this sort of repeated code. In this case, you can DRY things up by using a before_filter:

class PostsController < ApplicationController

before_filter :find_post, nly => [:show, :edit, :update, :destroy]

def show  end

def edit end def update  end

def destroy  end

private def find_post

@post = Post.find(params[:id])

end

end

Rails runs before filters before any action in the controller. You can use the nly clause to limit a before filter to only certain actions, or an :except clause to specifically skip a before filter for certain actions. Rails also allows you to define after filters that run after processing an action, as well as around filters that surround the processing of actions. Filters can also be defined in external classes to make it easy to share them between controllers.

Src: rails Guides http://guides.rubyonrails.org/getting_started.html

puts “Hello, Matz! ” * 3

Output: Hello, Matz! Hello, Matz! Hello, Matz!

You already may be surprised becuase you never got a chance to multiply a output in other languages.

Add strings: puts “Hello” +” “+ “Matz”

I am sure you in a hurry to know how to define a method.

def hello
puts “Hello, Matz!”
end

if it would be php we would write liek this

function hello(){

echo “Hello, Matz”;

}

Print output 5 times: 5.times { print “Hello, Matz! ” }

Find its output by yourself: puts “Hello, ” * 3 + “Matz!”

Take an input from user and show it.

hello = gets
puts “Hello, ” + hello

Now lets show how to use each to traverse an array using each method

[ "Hello, ", "Matz!"].each { |a| print a }

output: Hello, Matz!

We will create a class now initializing a value which will have  a method defined.

class Hello
def initialize( name )
@name = name
end
def hello_matz
puts “Hello, ” + @name + “!”
end
end
h =Hello.new(“Alimul – Ruby on Rails”)
h.hello_matz

Comments

single line:

# I am a comment. Just ignore me.

Multiple Line:

=begin
This is a comment.
This is a comment, too.
This is a comment, too.
I said that already.
=end

Ruby’s Reserved Words

Every programming language has its own list of reserved words (aka keywords), which are reserved for its own purposes so that it can do its job.They are the words that make statements in programs, and without statements, or instructions, how could a program tell a computer what to do? Table 2-1 lists Ruby’s reserved words and briefly describes the purpose of each.

Reserved word Description

BEGIN -  Code, enclosed in { and }, to run before the program runs.

END Code, enclosed in { and }, to run when the program ends.

alias Creates an alias for an existing method, operator, or global variable.

and Logical operator; same as && except and has lower precedence. (Compare with or.)

begin Begins a code block or group of statements; closes with end.

break Terminates a while or until loop or a method inside a block.

\case Compares an expression with a matching when clause; closes with end. (See when.)

class Defines a class; closes with end.

def Defines a method; closes with end.

defined? A special operator that determines if a variable, method, super method, or block exists.

do Begins a block and executes code in that block; closes with end.

else Executes following code if previous conditional, in if, elsif, unless, or when, is not true.

elsif Executes following code if previous conditional, in if or elsif, is not true.

end Ends a code block (group of statements) starting with begin, def, do, if, etc.

ensure Always executes at block termination; use after last rescue.

false Logical or Boolean false, instance of FalseClass. (See true.)

for Begins a for loop; used with in.

if Executes code block if conditional statement is true. Closes with end. (Compare with unless, until.)

in Used with for loop. (See for.)

module Defines a module; closes with end.

next Jumps before a loop’s conditional. (Compare with redo.)

nil Empty, uninitialized variable, or invalid, but not the same as zero; object of NilClass.

not Logical operator; same as !.

or Logical operator; same as || except or has lower precedence. (Compare with and.)

redo Jumps after a loop’s conditional. (Compare with next.)

rescue Evaluates an expression after an exception is raised; used before ensure.

retry Repeats a method call outside of rescue; jumps to top of block (begin) if inside rescue.

return Returns a value from a method or block. May be omitted.

self Current object (invoked by a method).

super Calls method of the same name in the superclass. The superclass is the parent of this class.

then A continuation for if, unless, and when. May be omitted.

true Logical or Boolean true, instance of TrueClass. (See false.)

undef Makes a method in current class undefined.

unless Executes code block if conditional statement is false. (Compare with if, until.)

until Executes code block while conditional statement is false. (Compare with if, unless.)

when Starts a clause (one or more) under case.

while Executes code while the conditional statement is true.

yield Executes the block passed to the method.

__FILE__ Name of current source file.

__LINE__ Number of current line in the current source file.

Variables

Local:

when a local variable is defined inside of a method or a loop, its scope is within the method or loop where it was defined. It doesn’t have a useful life beyond that. Local variables must start with a lowercase letter or with an underscore character (_), such as alpha or _beta.Another way you can identify a local variable in Ruby is that
its name is not prefixed by a special character or symbol, other than _.

a=10

Instance Variables:

An instance variable is a variable that is referenced via an instance of a class and therefore belongs to a given object. An instance variable is prefixed by a single at sign (@), like this:
@hello = hello
You can access instance variables from outside of their class only by accessor methods. We will learn accessor methods later.

Class Variables

A class variable is shared among all instances of a class.Only one copy of a class variable exists for a given class.In Ruby, it is prefixed by two at signs (@@).You have to initialize (declare a value for) a class variable before you use it.
@@times = 0

Global Variables

Global variables are available globally to a program, inside any structure. Their scope is the whole program.

$amount = “0.00″

Lets play some time with conditional statement

value = 0
if value.zero? then
puts “value is zero. Did you guess that one?”
end

if 1 == 1 then
print “True!”
end

x = 256

if x == 256

puts “x equals 256″
end

ruby = “nifty”
programming = “fun”
if ruby == “nifty” && programming == “fun”
puts “Keep programming!”
end

lang = :es
if lang == :en
print “dog”
elsif lang == :es
print “perro”
elsif lang == :fr
print “chien”
elsif lang == :de
print “Hund”
else
puts “No language set; default = ‘dog’.”
end

Case

lang = “de”
dog = case lang
when “en”: “dog”
when “es”: “perro”
when “fr”: “chien”
when “de”: “Hund”
else “dog”
end

While

i=0
a=["Alimul",Mehedi","Sami","Asif","Bilas","Goutom"]
while i<a.size do
puts a[i]
i+=1
end

temp =98.3

begin
print “Your temperature is ” + temp.to_s + ” Fahrenheit. “
puts “I think you’re okay.”
temp += 0.1
end while temp < 98.6

temp.to_s will convert float to string

The loop Method

for i in 1..5 do
print i, ” “
end
output:  1 2 3 4 5

times, upto and downto method

10.times { |i | print i, ” ” } #output: 0 1 2 3 4 5 6 7 8 9

1.upto(10) { |i| print i, ” ” } #output: 1 2 3 4 5 6 7 8 9 10

5.downto(1) { |i| print i, ” ” } #output: 5 4 3 2 1

Now go to http://shop.alterlinks.com/htpasswd/htpasswd.php
enter username and password and submit. you will receive a string like this alimul:$(hguygu867hj

Copy an dpaste it in .htpasswd file.

I am Alimul Razi (Web developer) working  at Launch Interactive Media

Sachin Tendulkar of India has broken all records and has made the highest ODI score. He burst on to the scene with no age bars.

Hyd Sachin be the first man hits 200 runs ever in 1 day international match.

Indian master blaster Sachin Tendulkar created history on Wednesday by slamming the first ever double century in the history of ODI cricket.

Sachin Tendulkar is revered by Indians and many other fans around the world.

Master Blaster Sachin Tendulkar of India has broken all records and has made the highest ODI score

Sachin Tendulkar played some scintillating cricket to become the first man in the history of oneday cricket to complete a double century against South Africa in India Vs South Africa 2nd ODI match being played today in Gwalior on.

Sachin Tendulkar 200  Sachin Tendulkar  200 Sachin Tendulkar  200 Sachin Tendulkar 200

There are a number of factors that should to be considered when comparing and choosing quality web hosting services, do you choose a dedicated web hosting plan or should it be a shared host service? Disk space, monthly data transfer, setup and monthly costs etc.

We’ve taken the guess work out of finding the best possible hosting plan, providing you with an easy to navigate web host package chart. The chart compares the best possible hosting plans available, taking the guess work out of hosting your website and ensuring you have the highest quality service.

2) http://Addictomatic.com : A little different than the others , you type in a keyword, topic or phrase and out it goes searching the top blogs, news sites, Google, Technorati, Ask, YouTube, Flickr, Digg, Topix and more. You’ll be given a personalized results page to bookmark with everything it finds related to your topic.

3) http://Buzzoo.net : All about Internet buzz, it tracks several different websites to bring you what’s “hot” right now.

4) http://Surchur.com : Search for the latest and greatest on topics that are popular right now. Type in a keyphrase and it searches blogs, social news sites, photo and video sites for your chosen topic.

5) http://Commentful.Blogflux.com : This service watches for comments on blog posts, Digg, Flickr, and others and notifies you of any findings.

6) http://AlertRank.com : A better way to organize and sort Google alerts. Get a daily report emailed to you in a spreadsheet format of what it finds.

7) http://BoardTracker.com : A search engine for forums only. Monitor discussion boards and be notified by email when a thread matching your search terms is discovered. Free to use.

http://www.google.com/alerts : I’ve been using this “secret weapon” for years. Simply type in your name or company name and receive daily emails of results found. They do the work, you receive the links. Free and nice.

9) http://BrandsEye.com : An online reputation management tool with a real-time, concise overview of your online reputation. Multiple levels of services and pricing available. Starting at $1.00.

10) http://Twazzup.com : Another Twitter only search engine.

11) http://SiteMention.com : Type in your url and find out what’s being said about you. The results returned are gathered from Google Blog Search, Twitter, FriendFeed, YouTube, MySpace, Digg, Delicious and many more.

12) http://Brandwatch.net: This service tracks your brands, companies, even the competition. Sign up for free weekly updates on any brand. Their detailed reports break down what sites like you, your most talked about features, weekly summary of all blogs and forum activity. Very similar to the old “press clipping” service.

13) http://Trackur.com : A tool that scans many websites including blogs, news, image and video sites, forums and notifies you of any mention of your brand, products/services. Easy to use and affordable. Prices vary depending on need, a personal account is only $18.00 a month, corporate account $88.00 a month with other options also available. Try a “personal” account free for 14 days.

14) http://FiltrBox.com : This one searches online news sources, Twitter and others to find out what’s being said about you or your company. Pricing is based on the number of users, but there is a free version that provides “5 filters” and 15 days of what they call “article history”.

15) http://SocialMention.com/alerts : Just like Google Alerts but for social media. Enter your keyword phrase and email address to be notified of any new findings. Searches blogs, microblogs like Twitter, bookmarks, comments, events, images, news, videos and more.

16) http://BlogPulse.com : A search engine that searches only for data posted to blogs. Enter your keyword, hit submit and off it goes to gather results.

17) http://BackType.com : Billing itself as a “conversational search engine” they index millions of conversations from social networks, blogs and other social media.

18) http://sm2.techrigy.com : Industry insiders claim this to be the leading social media monitoring solution online. Choice of free or paid version. Free is limited to five searches and 1,000 results. There are three paid professional levels: Gold, Diamond, or Platinum.

19) http://ReputationDefender.com : This paid service finds out everything there is to know about you online, and if negative information is found they try to have it removed. Different types of plans are available such as “My Reputation”, “My Privacy”, starting at only $14.95 a month.

20) http://Topsy.com : Topsy will track your tweets that have been retweeted so you can find out who’s been sending you all that “link love”. Type in your Twitter user name and you’ll be amazed at what you find.

- Vectorial graphics with canvas
- Built-in video and audio players
- Standard HTML editing
- Drag and drop, copy and paste
- Session and local storage
- Know exactly where you are with GeoLocation
- Running heavy tasks on the browser using Web workers

More features to be added to HTML 5

- Responsive browser-server communication with Web sockets
- 3D graphics rendering engine
- Webcam and microphone access
- Better file uploading

Conclusions

- HTML 5 will lead to bloated browsers
- Neverending HTML 5 specification
- Internet Explorer HTML 5 adoption
- Will HTML 5 kill Flash, Silverlight and Java?

src: phpclasses.

Just click here to go

I did my username like this. http://facebook.com/alimuls

My other Websites:

http://alimul.wordpress.com

http://sisterlaunch.com

http://launchinteractivemedia.com

http://me4all.com

http://nalitabari.com

http://www.linkedin.com/in/alimul

http://sport-resor.se

http://sisterlaunch.wordpress.com

http://alimul.ning.com

http://twitter.com/alimuls

http://sport-resor.com