... Perl control structures
3.1 Conditionals
For testing conditionals within Perl if it is used. To better illustrates, see the following example:
#!/usr/bin/perl -w
$var1 = 100;
7
Learn Perl byExample ... s/This is/Test/) {
print ("$exp\n");
}
7 About Tutorial
This tutorial was provided by http://www.freebsdonline.com
15
Learn Perl byExample - Perl Handbook for Beginners - Basics of Perl ... applications as CGIs.
This tutorial was provided by http://www.freebsdonline.com
You may freely distribute this document in any form without changing the text or
removing copyright notice.
1
Learn...
... for example, that lets Java know when an on- screen button
component has been clicked. You don't have to worry about clicks on on-screen buttons (usually),
because they're handled by ... is
resizable.
Component locate(int x, int
y)
Returns the component at the given
location.
void remove(Component comp)
Removes a component from the dialog
box.
void removeAll()
Removes all components.
void
setLayout(LayoutManager
mgr)
Sets ... int keyPressed;
public void init()
{
keyPressed = -1;
Font font =
new Font("TimesRoman", Font.BOLD, 144);
setFont(font);
http://www.ngohaianh.info
Derive the MouseApplet class...
... certain condition is true. If there is more than one
statement to execute until the condition is true, enclose them between BEGIN and END.
Listing 2.39 shows an implementation of multiplication that ... exit unconditionally from the WHILE loop. When SQL Server finds
a BREAK inside a WHILE, it continues the execution with the instruction right after the END of the WHILE.
CONTINUE
CONTINUE ... ##. Local temporary tables are available only in the
connection that created them, and when the connection is finished, the table is automatically dropped by SQL
Server, unless it is dropped explicitly...
...
The first example in Listing 7.9 creates three CHECK constraints on the NewOrders table: one CHECK
constraint for every condition used in the last example from Listing 7.8.
The second example ... constraint name
CREATE TABLE NewRegions (
RegionID int NOT NULL
CONSTRAINT PK_NewRegions
PRIMARY KEY NONCLUSTERED,
RegionDescription nchar (50) NOT NULL ,
)
GO
DROP TABLE NewRegions ... Every function referenced in the
expression must be deterministic, too.
An example of a nondeterministic expression is (Month(GetDate()) because it uses a
nondeterministic function, GetDate,...
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ise men say there are only two emotions in the universe - love
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Gift 6 – Humor
A
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... to learn web development with Rubyon Rails, how should I start?’’ For
years MichaelHartl has provided the answer as author of the RailsSpace tutorial in our
series and now the new Rubyon Rails
TM
3 ... Deploy
Welcome to Rubyon Rails
™
Tutorial. The goal of this book is to be the best answer to the
question, ‘‘If I want to learn web development with Rubyon Rails, where should I start?’’
By the time ... style favored by Rails. Ruby has its own idiosyncrasies,
so those will likely be new, too.
Experienced Ruby programmers: The set of Ruby programmers who don’t know
Rails is a small one nowadays,...
... Deploy
Welcome to Rubyon Rails
™
3 Tutorial: LearnRailsby Example. The goal of this book
is to be the best answer to the question, “If I want to learn web development with
Ruby on Rails, where ... informit.com/aw
Library of Congress Cataloging-in-Publication Data
Hartl, Michael.
Ruby onrails 3 tutorial : learnRailsbyexample / Michael Hartl.
p. cm.
Includes index.
ISBN-10: 0-321-74312-1 (pbk. ... minority.
www.it-ebooks.info
RUBYON RAILS
™
3 TUTORIAL
www.it-ebooks.info
Acknowledgments
Ruby on Rails
™
Tutorial owes a lot to my previous Rails book, RailsSpace, and hence
to my coauthor on that book,...
... Tại Sao Cần Biết Rubyon Rails?
- Ruby Là một ngôn ngữ "thời thượng", dễ học và dễ viết
(nhưng khó master!)
- So sánh với các ngôn ngữ và framework khác, RubyonRails
như xe đua ... quen với Migrations, cách truy vấn database, và xử lý
form
Chú ý: khi viết tránh để bị XSS hay SQL injection!
Chương Trình Training Rubyon Rails
2. Tài liệu
http://guides.rubyonrails.org/
Đây ... http://code.google.com/p/msysgit/
Rubyon Rails
- www.RubyOnRails.org
- Web framework, tương tự như Zend, nhưng "full stack", hoàn
chỉnh từ lớp presentation tới logging.
- Full stack:...
... (Yippee!)
Installing the Ruby Interpreter
To install Rubyon your computer, follow these steps:
1. Visit http://rubyforge.org/projects/rubyinstaller.
The software that you download from http://rubyforge.org/
projects/rubyinstaller
runs ... if you want, but you won’t use
it for the remainder of this chapter.
Creating a New RubyonRails Project
RadRails is an integrated development environment for Rubyon Rails. (See
Chapter 2.) ... http://rubyforge.org/
projects/rubyinstaller
runs only on Windows. If you’re running
Linux, try
http://rubyforge.org/projects /ruby instead. If you’re
a Macintosh user, visit
http://hivelogic.com/articles/2005/
12/01 /ruby_ rails_ lighttpd_mysql_tiger
.
2....
... mastery of web application development with Rails.
Beginning RubyonRails
978-0-470-06915-8
This book is for anyone who wants to develop online applications using
Ruby and Rails. A basic understanding ... it’s ready to work with Rails.
What’s in a Name?
The name RubyonRails is often shortened to Rails. Another common abbreviation
is the acronym RoR (pronounced like a lion’s “roar”). I feel it ... Associations 270
One-to-one Relationships 270
One-to-many Relationships 271
Many-to-many Relationships 271
Auto-generated Methods 273
Association Extensions 280
ActiveRecord Validations 281
Validation...
... Terminal one by one, pressing Return between
each one:
curl -O http://rubyforge.org/frs /download. php/5207/rubygems-0.8.11.tgz
tar xzvf rubygems-0.8.11.tgz
cd rubygems-0.8.11
sudo /usr/local/bin /ruby ... Second Gear’s Porchlight bug-tracking system was built using RubyonRails in three months.
Figure 1-6. Odeo is a podcasting creation-and-sharing tool built on Rails.
INTRODUCTION TO RUBYON RAILS
13
1
7524ch01.qxd ... the Ruby- FastCGI bindings, like so:
curl -O http://sugi.nemui.org/pub /ruby/ fcgi /ruby- fcgi-0.8.6.tar.gz
tar xzvf ruby- fcgi-0.8.6.tar.gz
cd ruby- fcgi-0.8.6
/usr/local/bin /ruby install.rb config...