Cocoon

new page

2010-10-25T09:57:00.001-07:00

possible?

The Big Bang Theory Season 4

2010-10-25T09:52:00.001-07:00

script

page

2010-10-25T09:47:00.001-07:00

how can i add additional pages?

명령 처리에 사용할 서버 저장공간이 부족합니다.

2010-07-17T20:16:00.000-07:00

경고 레지스트리 편집기나 다른 방법을 사용하여 레지스트리를 잘못 수정하면 심각한 문제가 발생할 수 있습니다. 이 문제를 해결하려면 운영 체제를 다시 설치해야 할 수도 있습니다. Microsoft는 문제에 대해 해결을 보증하지 않습니다. 레지스트리의 수정에 따른 모든 책임은 사용자에게 있습니다. 이 문제를 해결하려면 레지스트리에서 IRPStackSize 값을 늘리십시오.

시작을 누르고 실행을 누릅니다.
regedit를 입력한 다음 확인을 누릅니다.
아래 키로 이동합니다.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters
오른쪽 창에서 IRPStackSize 값을 두 번 누릅니다.

참고: IRPStackSize 값이 아직 없을 경우 다음 절차를 사용하여 값을 만듭니다.
1. 레지스트리의 Parameters 폴더에서 오른쪽 창을 마우스 오른쪽 단추로 누릅니다.
2. 새로 만들기를 가리킨 다음 DWord 값을 누릅니다.
3. IRPStackSize를 입력합니다.
  
  중요: 값 이름은 대/소문자를 구분하므로 표시되는 대로 "IRPStackSize"를 정확하게 입력합니다.
단위를 10진수로 변경합니다.
값 데이터 상자에 나열된 값보다 큰 값을 입력합니다.

4단계에서 설명한 절차를 사용하여 IRPStackSize 값을 만든 경우 기본값은 15입니다. 값을 3씩 늘리는 것이 좋습니다. 따라서 이전 값이 11이었으면 14를 입력한 다음 확인을 누릅니다.
레지스트리 편집기를 닫습니다.
컴퓨터를 다시 시작합니다.

앞의 절차를 완료한 후에도 문제가 지속되면 IRPStackSize의 값을 더 크게 늘리십시오. Windows 2000의 경우 최대값은 50(16진수 값 0x32)입니다.

Windows NT 4.0을 실행 중이고 앞의 절차를 완료한 후에도 문제가 지속되는 경우 Windows NT 서비스 팩 4 또는 서비스 팩 5를 적용해야 할 수 있습니다.

위로 가기

추가 정보

Windows NT 4.0에서 IRPStackSize의 기본값은 0x4이고 범위는 0x4부터 0xC(4-12)까지입니다. 서비스 팩 5 이상이 설치된 Windows NT 4.0에서는 0x7보다 작은 값은 무시합니다.

Windows 2000에서 IRPStackSize의 기본값은 15이며 범위는 11부터 50까지입니다. Windows XP에서IRPStackSize의 기본값은 15이며 범위는 11부터 50까지입니다.

참고: Microsoft Windows Server 2003의 기본값 및 범위는 Windows XP의 기본값 및 범위와 같습니다. 자세한 내용은 Microsoft 기술 자료의 다음 문서를 참조하십시오.

106167 오류 메시지: ... 서버 저장 공간이 부족합니다

참고: 앞의 문서는 IrpStackSize 값을 늘리도록 권장하지만 Windows NT 4.0을 실행 중인 컴퓨터에서 최대값 12로 늘리거나 Windows 2000을 실행 중인 컴퓨터에서 최대값 50으로 늘리는 경우와 같이 이 값을 최대값으로 늘려도 이 문제가 계속 발생할 수 있습니다.

IRPStackSize에 대한 자세한 내용은 Microsoft 기술 자료의 다음 문서를 참조하십시오.

198386 Lanman 서버에서 IRP 스택 크기 변경

자세한 내용은 다음 Symantec 웹 사이트를 방문하십시오.

http://service1.symantec.com/SUPPORT/ent-security.nsf/552ba2f7636bedf088256818006f78bf/b169373034dbfd1588256a2200272574?OpenDocument&src=bar_sch_nam

http://service1.symantec.com/SUPPORT/ent-security.nsf/9d94c8571a91ba4788256bf3007f62b5/1b2df18cc3f5dedd88256ddd0082f2ea?OpenDocument&src=bar_sch_nam

참고: 이 문서의 위치는 사전 통보 없이 변경될 수 있습니다. Symantec은 사용자의 편의를 위해서만 이 링크를 제공합니다. 이 링크를 포함했다고 해서 Symantec이 이러한 사이트의 내용을 보증하거나 권장하거나 책임을 인정한다는 것을 의미하지는 않습니다.

이 문서에 포함된 다른 공급업체의 연락처 정보는 기술 지원을 받는 데 도움을 주기 위한 것입니다. 이 연락처 정보는 예고 없이 변경될 수 있습니다. Microsoft는 이러한 다른 공급업체 연락처 정보의 정확성을 보증하지 않습니다.

이 문서에 나와 있는 다른 공급업체 제품은 Microsoft와 무관한 회사에서 제조한 것입니다. Microsoft는 이들 제품의 성능이나 신뢰성에 관하여 명시적이든 묵시적이든 어떠한 보증도 하지 않습니다.

http://support.microsoft.com/kb/177078/ko

x31 HTS721010G9AT00

2010-06-10T00:13:00.000-07:00

Containers, Blocks, and Iterators

2010-04-09T11:01:00.001-07:00

Category Ruby, Programming

Containers are objects that hold references to one or more other objects.

Arrays

A Ruby array holds a collection of object references identified by a non-negative integer index.

In an array class, [] is a method which accesses elements by index.

def [] (key)

if key.kind_of? (Integer)

result = @songs[key]

else

for I in 0…@songs.length

result = @songs[i] if key == aSong.name

end

return result

end

Hashes

Compared with arrays, hashes have one significant advantage: they can use any type of object as an index. However, they also have a significant disadvantage: their elements are not ordered, so you cannot use a hash as a stack or queue.

Blocks and Iterators

A better way of the [] mehtod:

def [] (key)

return @songs[key] if key.kind_of?(Integer)

return @songs.find { |aSong| aSong.name == key }

end

An iterator is a method that invokes a block of code repeatedly.

The uses of a block

A block is often the target of an iterator.

A block can be used to define a chunk of code that must run under some kind of transactional control.

class File

def File.openAndProcess(*args)

f = File.open(*args)

yield f

f.close()

end

File.openAndProcess("textfile", "r") do |aFile|

print while aFile.gets

end

In this way, the responsibility of closing an open file has been passed from the user of the file object to the file themselves.

The do…end block has lower precedence than {...}.

The method Kernel::block_given? returns true if a block is associated with the current method.

If the last parameter in a method definition is prefixed with an ampersand, Ruby looks for a code block whenever the method is called. The code block is converted to an object of class Proc and assigned to the parameter.

What is closure in a programming language?

Iterators

find, each, and collect

All the each iterator does is yield successive element of its collection.

In the collect iterator, the results returned by the block are used to construct a new array.

Programming in Ruby

2010-04-09T10:46:00.001-07:00

Ruby is an genuine object-oriented language, meaning every thing in Ruby is an object or a class that is a combination of instance variables and instance methods.

"gin joint".length		9
"Rick".index('c')		2
-123.abs		123

The difference between a single quote literal and a double quote literal is how much Ruby processes it when it gets created.

A double quote literal looks for substitutes for an escape sequence and # (…) constructs.

The value returned by Ruby method is the value of the last expression evaluated, so don't need a return.

Ruby conventions:

A variable starts with a lower case ==> local variable

A variable or name starts with an upper case ==> class name, module name, or constant variable

A variable starts with $ ==> global variable

A variable starts with @ ==> instance variable

A variable starts with @@ ==> class variable

Arrays and Hashes

Both are index collections and can take any mixed type of objects. The only difference between them is arrays' indexes must be integer whereas hashes indexes can be any kind of objects.

array = Array.new

array = []

array = [1, 'K', 'It's a string', 3.14]

array = %w[cat dog apple]

hash = Hash.new

hash = Hash.new(0)

hash = {0 => 'cat', 'dog' => 'bark', 9 => -9}

Control Structures

Statement modifiers

puts "Ich liebe dich" if myLove == herLove

puts "love me only" while myAge < 1000

Regular Expression

As you expect, regular expressions are objects in Ruby. The match operator =~ returns the position it first found or nil if not found.

individuated s yy:mm:dd 1P(erllython)l e Perl or Python

'Ruby of *Peril x Ruby and zero or one move character and Perl

(Ruby 1st Perl/ 4 Ruby and one or move white space and Perl

if line =~ (perl python

puts " You got me."

end

pos = sub (lperll, 'ruby') H replace first perl with ruby

pos = grubs (Python.' Ruby) * replace every Python with Ruby

Blocks and Iterators

Code blocks are chunks of code that you can associate with method invocations. Chunks of code are between braces or 'do … end'. Once you've created a block, you can associate it with a call to a method. You might be better off thinking of the block and the method as coroutines, which transfer control back and forth between themselves.

Reading and 'Riting

The gets routine has a side effect; as well as returning the last line read, it also stores the last line into the global variable $_.

while gets

if /Ruby/

end

ARGF represents a stream input.

ARGF.each { |line| print line unless line =~ /ruby/ }

Classes, Objects, and Variables

class - how to declare, define, create,

To create a new class object, invoke the new method of the class. Song.new calls the class' initialize method to set up the class' internal state.

class Song

def initialize(name, artist, duration)

@name = name

@artist = artist

@duration = duration

end

aSong = Song.new('Let it be', 'The Beatles', 310)

The inspect message dumps a object's id and instance variables. While the message's default formatting leaves something to be desired, the to_s message can be overridden.

Inheritance and Messages

Inheritance allows you to create a class that is a refinement or specialization of another class. The less than character(<) lets you inherit from another class. Make sure that you override the initialize method and the to_s method properly. You may not want a subclass directly to access the instance variables of its super class to set up because it couples between them; that's a bad programming style. Rather, use super in the subclass for decoupling.

Inheritance and Mixins

Multiple inheritance can be dangerous since the inheritance hierarchy can become ambiguous. In real life, however, things often inherit attributes from multiple sources. A Ruby class can only have a single direct parent, but Ruby has a technique called Mixins to provide a multiple-inheritance-like functionality.

Objects and Attributes

An object is solely responsible for maintaining its own consistency. Ruby provides a convenient way of creating getters and setters.

class Song

attr_reader :name, :artist, :duration

attr_writer :name, :artist, :duration

end

Virtual Attributes

Use attribute methods to create a virtual instance variable that seems like a real instance variable to outside of the world.

class Song

def durationInMinute

@duratoin / 60.0

end

def durationInMinute=(value)

@duration = (value * 60).to_i

end

The setter here is like an operator overloading in C++. Type casting is different from C-like languages. Ruby deals everything as an object, even a number, so Ruby provides the to_i method for type casting.

In his landmark book Object-Oriented Software Construction , Bertrand Meyer calls this the Uniform Access Principle. By hiding the difference between instance variables and calculated values, you are shielding the rest of the world from the implementation of your class. You're free to change how things work in the future without impacting the millions of lines of code that use your class. This is a big win.

Class Variables and Class Methods

class Song

@@plays = 0 # a class variable

MaxPlays = 50 # a class constant variable

def Song.initPlays

@@plays = 0

end

For class variables, by convention, Ruby puts @@ in front of a class variable name.

Singletons and Other Constructors

A singleton is an object that is singly created from a class.

class Logger

private_class_method = new

@@logger = nil

def Logger.create

@@logger = new unless @@logger

@@logger

end

The Logger class can not be created by the conventional way using the new method. Also class methods can be used as pseudo-constructors.

Access Control

Public methods can be called by anyone---there is no access control. Methods are public by default (except for initialize, which is always private).
Protected methods can be invoked only by objects of the defining class and its subclasses. Access is kept within the family.
Private methods cannot be called with an explicit receiver. Because you cannot specify an object when using them, private methods can be called only in the defining class and by direct descendents within that same object.

What does it mean by direct descendents?
If a method is protected, it may be called by any instance of the defining class or its subclasses. If a method is private, it may be called only within the context of the calling object---it is never possible to access another object's private methods directly, even if the object is of the same class as the caller.

Access control is determined dynamically, as the program runs, not statically.

Final test

2010-04-09T10:39:00.001-07:00

This would be the final test.

Email posting test

2010-04-09T10:21:00.000-07:00

I need to maintain my blog.

ntp time server correction

2008-03-12T12:44:00.000-07:00

ntp time server

sudo /etc/init.d/ntp stop
sudo ntpdate time.nist.gov
sudo /etc/init.d/hwclock.sh restart
sudo /etc/init.d/ntp start

Mac OSX Key Bindings

2008-03-02T17:18:00.000-08:00

~/Library/KeyBindings/DefaultKeyBinding.dict

{
       /* Remap Home / End to be correct :-) */
       "\UF729"  = "moveToBeginningOfLine:";                   /* Home         */
       "\UF72B"  = "moveToEndOfLine:";                         /* End          */
       "$\UF729" = "moveToBeginningOfLineAndModifySelection:"; /* Shift + Home */
       "$\UF72B" = "moveToEndOfLineAndModifySelection:";       /* Shift + End  */
}

/* ~/Library/KeyBindings/DefaultKeyBinding.dict */
{
   "^f"      = "moveWordForward:";            /* Ctrl-f    = next word     */
   "^b"      = "moveWordBackward:";           /* Ctrl-b    = previous word */
   "^v"      = "pageUp:";                     /* Ctrl-v    = page up       */
   "\UF729"  = "moveToBeginningOfLine:";      /* Home      = start of line */
   "^\UF729" = "moveToBeginningOfDocument:";  /* Ctrl-Home = start of doc  */
}

Key Modifiers

 ^ : Ctrl
 $ : Shift
 ~ : Option (Alt)
 @ : Command (Apple)
 # : Numeric Keypad

Non-Printable Key Codes

 Up Arrow:     \UF700        Backspace:    \U0008        F1:           \UF704
 Down Arrow:   \UF701        Tab:          \U0009        F2:           \UF705
 Left Arrow:   \UF702        Escape:       \U001B        F3:           \UF706
 Right Arrow:  \UF703        Enter:        \U000A        ...
 Insert:       \UF727        Page Up:      \UF72C
 Delete:       \UF728        Page Down:    \UF72D
 Home:         \UF729        Print Screen: \UF72E
 End:          \UF72B        Scroll Lock:  \UF72F
 Break:        \UF732        Pause:        \UF730
 SysReq:       \UF731        Menu:         \UF735
 Help:         \UF746


Supported Actions

 alignCenter:                                        newDocument:
 alignJustified:                                     openDocument:
 alignLeft:                                          orderBack:
 alignRight:                                         orderFront:
 breakUndoCoalescing                                 orderFrontLinkPanel:
 cancelOperation:                                    orderFrontListPanel:
 capitalizeWord:                                     orderFrontSpacingPanel:
 center                                              orderFrontTablePanel:
 centerSelectionInVisibleArea:                       outline:
 changeCaseOfLetter:                                 pageDown:
 checkSpelling:                                      pageUp:
 clearRecentDocuments:                               paste:
 complete:                                           pasteAsPlainText:
 copy:                                               pasteAsRichText:
 copyFont:                                           pasteFont:
 copyRuler:                                          pasteRuler:
 cut:                                                performClose:
 delete:                                             performMiniaturize:
 deleteBackward:                                     performZoom:
 deleteBackwardByDecomposingPreviousCharacter:       printDocument:
 deleteForward:                                      raiseBaseline:
 deleteToBeginningOfLine:                            revertDocumentToSaved:
 deleteToBeginningOfParagraph:                       runPageLayout:
 deleteToEndOfLine:                                  saveAllDocuments:
 deleteToEndOfParagraph:                             saveDocument:
 deleteToMark:                                       saveDocumentAs:
 deleteWordBackward:                                 saveDocumentTo:
 deleteWordForward:                                  scrollLineDown:
 hide:                                               scrollLineUp:
 ignoreSpelling:                                     scrollPageDown:
 indent:                                             scrollPageUp:
 insertBacktab:                                      selectAll:
 insertContainerBreak:                               selectLine:
 insertLineBreak:                                    selectParagraph:
 insertNewline:                                      selectToMark:
 insertNewlineIgnoringFieldEditor:                   selectWord:
 insertParagraphSeparator:                           setMark:
 insertTab:                                          showContextHelp:
 insertTabIgnoringFieldEditor:                       showGuessPanel:
 insertText:                                         startSpeaking:
 loosenKerning:                                      stopSpeaking:
 lowerBaseline:                                      subscript:
 lowercaseWord:                                      superscript:
 moveBackward:                                       swapWithMark:
 moveBackwardAndModifySelection:                     terminate:
 moveDown:                                           tightenKerning:
 moveDownAndModifySelection:                         toggleBaseWritingDirection:
 moveForward:                                        toggleContinuousSpellChecking:
 moveForwardAndModifySelection:                      toggleRuler:
 moveLeft:                                           transpose:
 moveLeftAndModifySelection:                         transposeWords:
 moveRight:                                          turnOffKerning:
 moveRightAndModifySelection:                        turnOffLigatures:
 moveToBeginningOfDocument:                          underline:
 moveToBeginningOfDocumentAndModifySelection:        unscript:
 moveToBeginningOfLine:                              uppercaseWord:
 moveToBeginningOfLineAndModifySelection:            useAllLigatures:
 moveToBeginningOfParagraph:                         useStandardKerning:
 moveToEndOfDocument:                                useStandardLigatures:
 moveToEndOfDocumentAndModifySelection:              yank:
 moveToEndOfLineAndModifySelection:
 moveToEndOfLine:                                   
 moveToEndOfParagraph:                              
 moveUp:                                            
 moveUpAndModifySelection:                 
 moveWordBackward:                         
 moveWordBackwardAndModifySelection:       
 moveWordForward:                          
 moveWordForwardAndModifySelection:        
 moveWordLeft:                             
 moveWordLeftAndModifySelection:           
 moveWordRight:                            
 moveWordRightAndModifySelection:  

references:
http://evansweb.info/articles/2005/03/24/mac-os-x-and-home-end-keys
http://www.lsmason.com/articles/macosxkeybindings.html

Audio file from video file

2008-02-28T18:18:00.001-08:00

$ ffmpeg -vn -acodec copy -i infile.avi outfile.mp3

$ mplayer -vo null -dumpaudio video.avi -dumpfile audio.mp3

setup clock in linux

2008-02-21T01:22:00.000-08:00

$ sudo emacs /etc/ntp.conf

server time.nist.gov
fudge time.nist.gov stratum 10

$ sudo timeconfig
$ sudo dateconfig

Linux as the WebDAV Server

2008-02-20T20:41:00.001-08:00

Linux as the WebDAV Server:

On Linux, use your favorite package manager to install Apache. Most distributions will use Apache httpd 2.0 which has mod_dav built-in, so the only editing of the httpd.conf file needed are the DAVLockDB and Directory definitions. Note that you can also authenticate against Active Directory or LDAP using the mod_auth_kerb or mod_auth_ldap Apache modules. For this example, we’ll stick with using htpasswd:

$ sudo vi /etc/httpd/conf/http.conf
..
DAVLockDB /var/lib/dav/DAVLockDB

DAV On
AuthName "WebDAV Login"
AuthType Basic
AuthUserFile /etc/httpd/.htpasswd

  require valid-user

Order allow,deny
Allow from all

Now create the directories and set permissions:

$ sudo su
# mkdir /usr/local/apache/var
# chown apache:apache /usr/local/apache/var
# mkdir /var/www/html/webdav
# chown www:www /var/www/html/webdav

Finally, on Linux create the user and password file and restart the httpd daemon:

# htpasswd -m -c /etc/httpd/.htpasswd testuser
New password:
Re-type new password:
Adding password for user testuser
# /sbin/service httpd restart
Stopping httpd:  [ OK ]
Starting httpd:  [ OK ]

Now let’s try it out by connecting some clients!

reference:
http://weblog.bignerdranch.com/?p=18

2008-02-20T20:41:00.000-08:00

Linux as the WebDAV Server:

$ sudo vi /etc/httpd/conf/http.conf
..
DAVLockDB /usr/local/apache/var/DAVLockDB

 DAV On
 AuthName “WebDAV Login”
 AuthType Basic
 AuthUserFile /etc/httpd/.htpasswd
 
   require valid-user
 
 Order allow,deny
 Allow from all

Now create the directories and set permissions:

$ sudo su
# mkdir /usr/local/apache/var
# chown apache:apache /usr/local/apache/var
# mkdir /var/www/html/webdav
# chown www:www /var/www/html/webdav

Finally, on Linux create the user and password file and restart the httpd daemon:

# htpasswd -m -c /etc/httpd/.htpasswd testuser
New password:
Re-type new password:
Adding password for user testuser
# /sbin/service httpd restart
Stopping httpd:  [ OK ]
Starting httpd:  [ OK ]

Now let’s try it out by connecting some clients!

reference:
http://weblog.bignerdranch.com/?p=18

apache, DocumentRoot must be a directory

2008-02-20T20:38:00.000-08:00

You got "DocumentRoot must be a directory" error even it is really a
directory because of SELinux extensions. Run
system-config-securitylevel (or redhat-config-securitylevel) to
disable SELinux for httpd or give SELinux permissions to that
directory:
chcon -R -h -t httpd_sys_content_t /path/to/directory

More help at: http://fedora.redhat.com/docs/selinux-faq-fc3/index.html

reference:
http://www.issociate.de/board/post/186682/DocumentRoot_must_be_a_directory.html

Install Ruby on Rails

2008-01-28T23:58:00.000-08:00

1) Install Ruby

sudo apt-get install ruby rdoc irb libyaml-ruby libzlib-ruby ri libopenssl-ruby ruby1.8-dev

2) Install RubyGems via source (recommended):

For me, the below installed the gem executable to /usr/bin/gem1.8. I created a symbolic link so the rest of these commands will work: sudo ln -s /usr/bin/gem1.8 /usr/bin/gem

wget http://rubyforge.org/frs/download.php/29548/rubygems-1.0.1.tgz
tar xzvf rubygems-1.0.1.tgz
cd rubygems-1.0.1
sudo ruby setup.rb
ln -s /usr/bin/gem1.8 /usr/bin/gem
sudo gem update --system

2)(alternate) Install RubyGems from ubuntu repository and update it (not recommended because apt-get will complain about files changed by gem update --system):

sudo apt-get install rubygems
sudo gem update --system

3) Install Rails and it's dependencies (with RubyGems)

sudo gem install rails -y

Here is a good time to install any gems you may need.

4) Create your first Rails app, as the current user (i.e., no sudo):

$ rails /path/to/new/railsapp

Of course, replace /path/to/new/railsapp with the path to the location where you'd like the source code for your new Rails application to exist. This can be /home/myhome/rails/myapp.

Reference: https://help.ubuntu.com/community/RubyOnRails

Getting strat PostgreSQL 8.2.6

2008-01-28T19:54:00.000-08:00

Settings for PostgreSQL in Ubuntu 7.04 (Feisty Fawn)

1. create user

$ su -
# su - postgres
$ createuser husylvan
$ su - husylvan

2. create cluster

$ sudo pg_createcluster -u husylvan -d ~/pgdata 8.2 pgdata

*Configuration files(postgresql.conf, pg_hba.conf, and pg_ident.conf) are in /etc/postgresql/8.2/pgdata/

3. start PostgreSQL server

$ pg_ctlcluster 8.2 pgdata start

4. create database

$ createdb mydb

5. start PostgreSQL interactive terminal

$ psql mydb

* commands introduced by TA are in /usr/lib/postgresql/8.2/bin
** for ruby on rails
$ sudo gem install ruby-postgres -- --with-pgsql-include-dir=/usr/include/postgresql --with-pgsql-lib-dir=/usr/lib/postgresql/8.2/lib

Settings for PostgreSQL in Mac OS

1. download PostgreSQL 8.2.5 for Mac OS
http://www.postgresqlformac.com

2. install server only
double click PostgreSQL.mpkg in Server folder

3. it will be installed in /Library/PostgreSQL8

4. change postgres account password
sudo passwd postgres

5. create my account role in the db
su -m postgres -c 'createuser Hwal'

6. create db using Create Database icon in Applications/PostgreSQL folder

# for ruby on rails

$sudo gem install ruby-postgres -- \
--with-pgsql-include-dir=/Library/PostgreSQL8/include \
--with-pgsql-lib-dir=/Library/PostgreSQL8/lib

## other way (not recommended)
$ initdb -D ~/Documents/ClassDocs/cs186/pgdata
$ pg_ctl -D ~/Documents/ClassDocs/cs186/pgdata start
$ createdb depot_development
$ psql depot_development
% CREATE TABLE countries (
name char(20),
latitude int,
longitude int,
area int,
population int,
gdp int,
gdpYear int);

Eclipse Java debugging problem

2008-01-22T18:17:00.000-08:00

To install proprietary Java, you must have the Multiverse repository enabled.

Ubuntu 7.04

Sun Java6: sun-java6-bin, sun-java6-jre

sudo apt-get install sun-java6-bin sun-java6-jre

Now you need to open Eclipse and specify that the default workspace JRE
should be SUNs JRE. Go to Window - Preferences - Java - Installed JREs
and click add to add SUN JRE.
The JRE home directory is: /usr/lib/jvm/java-6-sun

Converting between tab and space in Emacs

2007-09-15T18:57:00.000-07:00

Emacs: "M-x untabify" will ConvertTabsToSpaces in the region; "M-x tabify" will ConvertSpacesToTabs.

Tab width

M-x set-variable  tab-width 7

For this session, force Emacs to indent with spaces, never with TABs:

M-x set-variable indent-tabs-mode nil

http://www.student.northpark.edu/pemente/emacs_tabs.htm

Alan Kay: Doing with Images Makes Symbols

2007-08-16T01:27:00.000-07:00

Alan Kay: Doing with Images Makes Symbols (1987)

part 1
http://www.archive.org/details/AlanKeyD1987

part2
http://www.archive.org/details/AlanKeyD1987_2

Windows Installer error 1601

2007-08-08T11:23:00.000-07:00

Windows Installer error 1601 and msiexec.exe cannot be started

#
Start Windows Installer Service manually
Under Windows XP Professional
Control Panel -> Administrative Tools -> Services -> Windows Installer -> right click and choose "Start"

Under Windows XP Home
If XP Home doesn't have "Services" in its Control Panel, try typing "Services.msc" at the run or command

Try to install your desired program

#
Make sure that your system has up-to-date system files
start -> Run... -> cmd -> sfc /scannow

#
You may not have a right permission on your Windows XP as an administrator. Even though your account type appears as Computer Administrator in User Accounts under Control Panel, you may not have full permission of Computer Administrator. To have full control on Windows Installer, your account must be an administrator. To do that,

0. re-register Windows Installer Service

start -> Run... -> cmd -> msiexec.exe /unregister
msiexec.exe /regserver

1. open registry editor

start -> Run... -> regedit

2. Click the following registry hive: HKEY_CLASSES_ROOT
3. On the Edit menu, click Permissions
4. Change your account type to be an administrator

Click Advanced button -> Select Owner tab -> double click your account name to get ownership on your computer -> OK -> Apply

5. cmd -> Services.msc -> Windows Installer -> Properties -> "Log On" tab -> check "allow service to interact with desktop" -> "General" tab -> Change "startup type" to automatic -> ok

5. Restart the computer

6. If SYSTEM is not listed in the Group or user names list,

click Add, make sure that the local computer name appears in the From this location box
-> type system in the Enter the object names to select box, click Check Names, and then click OK
-> click SYSTEM in the Group or user names list
-> select the Full Control check box under allow in the Permissions for SYSTEM box
-> Apply,
-> OK
-> quit Registry Editor
-> Restart the computer

Reference: http://www.annoyances.org/exec/forum/winxp/1059790283

Linux UVC Installation

2007-07-25T10:16:00.000-07:00

Linux UVC for my web cam

1. install subversion to download UVC source codes

$ sudo apt-get install subversion

2. download UVC sources

$ svn checkout svn://svn.berlios.de/linux-uvc/linux-uvc/trunk

3. before compile the sources

$ sudo apt-get build-essential
$ sudo apt-get kernel-headers

4. go to the Linux UVC directory

$ cd trunk

5. open the Make file in this directory

$ sudo make

6. open Makefile

$ vi Makefile
INSTALL_MOD_DIR := usb/media
to
INSTALL_MOD_DIR := kernel/ubuntu/media/usbvideo

7. make

$ make

8. install

$ sudo make install

Reference:
http://openfacts.berlios.de/index-en.phtml?title=Linux+UVC

The Power of 48 Minutes

2007-07-25T01:30:00.000-07:00

Install Timer Applet on Ubuntu 7.04

$ sudo apt-get install timer-applet

Some nice voice alarms here, http://www.voco.uk.com

References: http://kldp.org/node/84516
http://successbeginstoday.org/wordpress/2006/09/the-power-of-48-minutes

My Learning Style

2007-07-23T21:14:00.001-07:00

The results of Hwal Kim's learning inventory are:

Visual/Nonverbal 24 Visual/Verbal 24 Auditory 10 Kinesthetic 32

Your primary learning style is:

The Tactile/ Kinesthetic Learning Style

You learn best when physically engaged in a "hands on" activity. In the classroom, you benefit from a lab setting where you can manipulate materials to learn new information. You learn best when you can be physically active in the learning environment. You benefit from instructors who encourage in-class demonstrations, "hands on" student learning experiences, and field work outside the classroom.

Strategies for the Tactile/ Kinesthetic Learner:

To help you stay focused on class lecture, sit near the front of the room and take notes throughout the class period. Don't worry about correct spelling or writing in complete sentences. Jot down key words and draw pictures or make charts to help you remember the information you are hearing.

When studying, walk back and forth with textbook, notes, or flashcards in hand and read the information out loud.

Think of ways to make your learning tangible, i.e. something you can put your hands on. For example, make a model that illustrates a key concept. Spend extra time in a lab setting to learn an important procedure. Spend time in the field (e.g. a museum, historical site, or job site) to gain first-hand experience of your subject matter.

To learn a sequence of steps, make 3'x 5' flashcards for each step. Arrange the cards on a table top to represent the correct sequence. Put words, symbols, or pictures on your flashcards -- anything that helps you remember the information. Use highlighter pens in contrasting colors to emphasize important points. Limit the amount of information per card to aid recall. Practice putting the cards in order until the sequence becomes automatic.

When reviewing new information, copy key points onto a chalkboard, easel board, or other large writing surface.

Make use of the computer to reinforce learning through the sense of touch. Using word processing software, copy essential information from your notes and textbook. Use graphics, tables, and spreadsheets to further organize material that must be learned.

Listen to audio tapes on a Walkman tape player while exercising. Make your own tapes containing important course information.

Web Version of the Learning Styles Survey © Copyright 2000 by Suzanne Miller, Instructor
Contact me via: smiller@dvc.edu or or phone: (510) 685-1230 ext 830 or fax: (510) 687-2557
Diablo Valley College 321 Golf Club Road, Pleasant Hill, CA 94523
latest update October 25, 2000.

Reference: http://www.metamath.com/lsweb/dvclearn.htm

Speed up firefox on Ubuntu

2007-07-23T18:29:00.000-07:00

about:config

1. network.http.pipelining -> true
2. network.http.pipelining.maxrequests -> 8
3. network.http.proxy.pipelining -> true
4. network.dns.disableIPv6 -> true
5. plugin.expose_full_path -> true
6. Right click -> New -> Integer: nglayout.initialpaint.delay -> 0
7. Right click -> New -> Integer: content.notify.backoffcount -> 5
8. Right click -> New -> Boolean: content.notify.ontimer -> true
9. Right click -> New -> Integer: ui.submenuDelay -> 0
10. layout.spellcheckDefault -> 2
11. Right click -> New -> Integer: browser.cache.memory.capacity -> 16384
12. Right click -> New -> Integer: content.maxtextrun -> 5000
13. add-on : fasterfox

References:
http://www.ubuntugeek.com/speed-up-firefox-web-browser.html
http://fasterfox.mozdev.org
http://kb.mozillazine.org

Install K3B MAD MP3 codec on Ubuntu

2007-07-23T03:37:00.000-07:00

It's very simple now.
Ubuntu 7.04 Feisty

Install K3B MAD MP3 Codec

$ sudo apt-get install libk3b2-mp3

Emulating the XO/Quick Start/Linux

2007-07-23T03:08:00.000-07:00

Debian/Ubuntu/Fedora/...

1 - Unpack the image

bzcat olpc-redhat-stream-development-ext3.img.bz2 > laptop.img

2 - Obtain qemu

On Debian/Ubuntu, as root:

apt-get install qemu

On Fedora, as root:

yum install qemu

3 - Run qemu on the image

qemu -soundhw es1370 -serial `tty` -hda laptop.img

Then see Running for the first time.

4 - (optional, but recommended) Make qemu run faster

If you have an x86 or x86_64 cpu, you can use kqemu to speed up the emulation several 100%.

4 a - Obtain kqemu

On Debian/Ubuntu, as root, do one of:

apt-get install kqemu-modules-2.6-486    # if you have a 486/original Pentium
apt-get install kqemu-modules-2.6-686    # if you have a later Pentium
apt-get install kqemu-modules-2.6-k7     # if you have a 32-bit AMD Duron/Athlon/AthlonXP

Then

apt-get install kqemu-common

to add docs and have it auto-load at boot time.

In Ubuntu 7.04, you'll have to use module-assistant to compile kqemu.

Install the program:

sudo apt-get install module-assistant

Download the kernel headers:

sudo module-assistant prepare kqemu

Download, compile and install the kqemu module package:

sudo module-assistant auto-install kqemu

Due to an open bug in ubuntu's kqemu-source package, you'll need to do the following as well:

sudo nano /etc/modprobe.d/kqemu

Change the contents to be:

options kqemu major=0

Save the file and exit nano. Then do:

sudo nano /etc/udev/rules.d/60-kqemu.rules

Enter this text into the empty file:

KERNEL=="kqemu", NAME="%k", MODE="0666"

Save the file and exit nano.

On Fedora x86,

XXX please fill this in if you know

On Fedora x86_64,

as of 2007-05-13, there are no official rpms for kqemu, or the kqemu kernel module, and they are not included in the qemu rpm. atrpms.net has kqemu rpms. Or install from source.

I was successful using kqemu-1.3.0-2.fc6.i386.rpm and kqemu-kmdl-2.6.20-1.2962.fc6-1.3.0-2.fc6.x86_64.rpm from atrpms on fc6. 2962 is the kernel version (eg, ls /boot/). MitchellNCharity 19:40, 1 July 2007 (EDT)

4 b - Run modprobe

/sbin/modprobe kqemu major=0

This will need to be run again if the host computer is rebooted (unless noted above). If you forget, qemu will be slow again (and a one-line error message scroll by when you run qemu).

4 c - Run a qemu variant with the -kernel-kqemu option

On x86,

qemu -kernel-kqemu ...

On x86_64,

qemu-system-x86_64 -kernel-kqemu ...

If you forget and use just qemu instead, things will be slow again.

Reference: http://wiki.laptop.org/go/Emulating_the_XO/Quick_Start/Linux

시간을 정복한 남자, 류비셰프

2007-07-21T19:12:00.000-07:00

Switch Caps Lock to Ctrl

2007-07-21T18:59:00.000-07:00

On Windows XP Professional
It's actually not switch but swap Caps Lock key with Control key on a Windows XP professional version.

1. start -> Run -> regedit
2. Find the Keyboard Layout directory where is in
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout
3. Click on Edit->New->Binary Value
4. Name it "Scancode Map" without the quotes
5. Right click -> Modify
6. Input the values below
00,00,00,00,00,00,00,00,
03,00,00,00,1d,00,3a,00,
3a,00,1d,00,00,00,00,00

Reference: http://www.usnetizen.com/fix_capslock.html

On Ubuntu 7.04 Feisty
1. create .Xmodmap file in your home directory

$ vi ~/.Xmodmap

2. write down below

! Switch caps lock and left control
remove Lock = Caps_Lock
remove Control = Control_L
keysym Control_L = Caps_Lock
keysym Caps_Lock = Control_L
add Lock = Caps_Lock
add Control = Control_L

3. load .Xmodmap file

$ xmodmap ~/.Xmodmap

4. next time you log in to your Gnome, it will detect .Xmodmap file automatically. Thus, next steps are not really necessary.

If ~/.xinitrc doesn't exist
$ cp /etc/X11/xinit/xinitrc ~/.xinitrc

In all cases
$ vi ~/.xinitrc
in the first line,
xmodmap ~/.Xmodmap

References:
http://ubuntuguide.org/wiki/Ubuntu:Feisty#How_to_remap_the_Caps_Lock_key_as_another_Control_key
http://dinomite.net/archives/caps-lock-to-control-on-ubuntu

External Hard Drive Install, Making a File System in Linux

2007-07-16T17:45:00.000-07:00

// report file system disk usages
$ df

// low level format, fulfill with zero
# dd if=/dev/zero of=/dev/sdb1

// create or delete the partition
# fdisk /dev/sdb
or # cfdisk /dev/sdb

Remain in fdisk and do the following:
a. You need to add a new partition so type n
b. Make it a primary. Press p
c. Make it the 1st partition. Press 1
d. Use the defaults to create one big hard disk. Press enter twice
e. You need to change the partition's system id so type t
f. To see the list of codes type L
g. To select vfat, W95 Ext'd (LBA), press c
h. Now write the changes to disk. Press w

// Create the file system.
# mkfs.vfat -F 32 -n VolumeName /dev/sdb1

My Lovely Family

2007-07-14T21:22:00.000-07:00

This picture was took in the private room of my parents on July 10, 2007, the day before I came back to California. I don't know when my family can get together again. My brother, who is a chef, got a job in a Japanese restaurant in Australia, so he's going to leave with his wife on July 19, 2007. My father told me, one day, "I feel like becoming an orphan." Of course, my brother and me are not his parents. It was just an emotion that he felt when he was told that my brother made a decision to go to Australia.

When my international family get together next time, I wish that there would be one more person in the picture. :-)