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2008年10月21日 星期二
2008年10月20日 星期一
CSS selectors
group selector ','
h1, h2, h3 {...}
contextual selector ' '
p em {...}
child selector '>'
p > span {css ...} : only the 'span' which is child of 'p' will apply the embraced css
universal selector '*'
p * span {css ...} : the 'span' under all kids of 'p' will apply the embraced css but the 'span' which is the kid of 'p' will not!
adjacent limb selector '+'
h1, h2, h3 {...}
contextual selector ' '
p em {...}
child selector '>'
p > span {css ...} : only the 'span' which is child of 'p' will apply the embraced css
universal selector '*'
p * span {css ...} : the 'span' under all kids of 'p' will apply the embraced css but the 'span' which is the kid of 'p' will not!
adjacent limb selector '+'
2008年9月21日 星期日
Install codeblocks on Ubuntu
Prerequisites:
//=== wx2.6
1. sudo apt-get install build-essential
2. sudo apt-get install gdb
3. sudo apt-get install libwxgtk2.6-0
4. sudo apt-get install libwxgtk2.6-dev wx2.6-headers wx-common
5. sudo apt-get install wx2.6-doc
step 1-5 in one command
sudo apt-get install build-essential gdb libwxgtk2.6-0 libwxgtk2.6-dev wx2.6-headers wx2.6-doc wx-common
//=== wx2.8
Add deb http://apt.wxwidgets.org/ edgy-wx main
or deb http://apt.wxwidgets.org/ feisty-wx main
to your sources.list.
sudo nano /etc/apt/sources.list
deb http://apt.wxwidgets.org/ gutsy-wx main
deb-src http://apt.wxwidgets.org/ gutsy-wx main
wget http://apt.wxwidgets.org/key.asc
sudo apt-key add key.asc
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install libwxgtk2.8-0 libwxgtk2.8-dev wx2.8-headers wx-common
//===
Install codeblocks:
1. Download the tar.gz file to your computer and extract the files to an empty directory, such as one called temp for example.
tar xvf CB_date-of-build_revision-number_Ubuntu6.10+7.04_wx2.8.4.tar.gz
2. Install all the packages at the same time.
sudo dpkg -i *.deb
The packages can be installed individually, if you prefer not to install everything. The first package to install is libcodeblocks0 followed by the codeblocks package. All the other packages are optional.
If you want to install the wxsmith and/or contrib packages, you must install the libwxsmithlib0 package first.
[ref] http://wiki.codeblocks.org/index.php?title=Installing_Code::Blocks_nightly_build_on_Ubuntu
//=== wx2.6
1. sudo apt-get install build-essential
2. sudo apt-get install gdb
3. sudo apt-get install libwxgtk2.6-0
4. sudo apt-get install libwxgtk2.6-dev wx2.6-headers wx-common
5. sudo apt-get install wx2.6-doc
step 1-5 in one command
sudo apt-get install build-essential gdb libwxgtk2.6-0 libwxgtk2.6-dev wx2.6-headers wx2.6-doc wx-common
//=== wx2.8
Add deb http://apt.wxwidgets.org/ edgy-wx main
or deb http://apt.wxwidgets.org/ feisty-wx main
to your sources.list.
sudo nano /etc/apt/sources.list
deb http://apt.wxwidgets.org/ gutsy-wx main
deb-src http://apt.wxwidgets.org/ gutsy-wx main
wget http://apt.wxwidgets.org/key.asc
sudo apt-key add key.asc
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install libwxgtk2.8-0 libwxgtk2.8-dev wx2.8-headers wx-common
//===
Install codeblocks:
1. Download the tar.gz file to your computer and extract the files to an empty directory, such as one called temp for example.
tar xvf CB_date-of-build_revision-number_Ubuntu6.10+7.04_wx2.8.4.tar.gz
2. Install all the packages at the same time.
sudo dpkg -i *.deb
The packages can be installed individually, if you prefer not to install everything. The first package to install is libcodeblocks0 followed by the codeblocks package. All the other packages are optional.
If you want to install the wxsmith and/or contrib packages, you must install the libwxsmithlib0 package first.
[ref] http://wiki.codeblocks.org/index.php?title=Installing_Code::Blocks_nightly_build_on_Ubuntu
C++ IDE tools for Ubuntu
http://en.wikipedia.org/wiki/Comparison_of_integrated_development_environments
CodeLite
Codeblocks
Code::Blocks?
Geany(only for KDE?)
Eclipse
(? Eclipse for C++ is ok, but not so good as Eclipse for Java?)
CodeLite
Codeblocks
Code::Blocks?
Geany(only for KDE?)
Eclipse
(? Eclipse for C++ is ok, but not so good as Eclipse for Java?)
2008年8月22日 星期五
Mono installation on Linux
Using Package Management Systems for linux such as RPM, Red Carpet, Yum, Deb, Portage, Fink, DarwinPorts ...
1. RPM:
2. Yum
Yum, another RPM compatible system is found in Fedora based distributions and can be used to install Mono and dependencies.
On Fedora Core 3, Putting the mono.repo (http://www.go-mono.com/download/fedora-3-i386/mono.repo) file in /etc/yum.repos.d will allow you to install mono and related packages.
3. Deb and Portage
Mono can be usually found in Debian (http://pkg-mono.alioth.debian.org/) (Debian, Ubuntu distributions) and Portage (http://www.gentoo-portage.com/dev-lang/mono) (Gentoo) systems.
These package system are not compatible with RPM based system.
http://packages.ubuntu.com/gutsy/mono
http://pkg-mono.alioth.debian.org/
Installing Mono 1.9.1 on Ubuntu 8.04 Hardy Heron
http://tempvariable.blogspot.com/2008/04/installing-mono-191-on-ubuntu-804-hardy.html
If you want to use them add this to your /etc/apt/sources.list:
deb http://debian.meebey.net/etch-backports /
http://www.go-mono.com/archive/1.9.1/
4. mono-gmcs (C#2.0 compiler)
http://packages.ubuntu.com/gutsy/devel/mono-gmcs
[ref] http://www.mono-project.com/Getting_Mono
1. RPM:
- download and unzip mono-all.zip
- sudo rpm -Uvh *rpm
2. Yum
Yum, another RPM compatible system is found in Fedora based distributions and can be used to install Mono and dependencies.
On Fedora Core 3, Putting the mono.repo (http://www.go-mono.com/download/fedora-3-i386/mono.repo) file in /etc/yum.repos.d will allow you to install mono and related packages.
3. Deb and Portage
Mono can be usually found in Debian (http://pkg-mono.alioth.debian.org/) (Debian, Ubuntu distributions) and Portage (http://www.gentoo-portage.com/dev-lang/mono) (Gentoo) systems.
These package system are not compatible with RPM based system.
http://packages.ubuntu.com/gutsy/mono
http://pkg-mono.alioth.debian.org/
Installing Mono 1.9.1 on Ubuntu 8.04 Hardy Heron
http://tempvariable.blogspot.com/2008/04/installing-mono-191-on-ubuntu-804-hardy.html
If you want to use them add this to your /etc/apt/sources.list:
deb http://debian.meebey.net/etch-backports /
http://www.go-mono.com/archive/1.9.1/
4. mono-gmcs (C#2.0 compiler)
http://packages.ubuntu.com/gutsy/devel/mono-gmcs
[ref] http://www.mono-project.com/Getting_Mono
Mono spec
ECMA standard ECMA-335 (http://www.ecma-international.org/publications/standards/Ecma-335.htm) .
Common Language Infrastructure(CLI) == Common Language Runtime(CLR)??
Common Language Specification(CLS)
This is specified in ECMA-335 ,chapter 6. It defines the interface to the CLI
ECMA Standard 334 (http://www.ecma-international.org/publications/standards/Ecma-334.htm) , the C# language specification.
ECMA Standard 335 (http://www.ecma-international.org/publications/standards/Ecma-335.htm) , the Common Language Infrastructure.
Managed and Unmanaged Code
Within a native .NET/Mono application, all code is managed ; that is, it is governed by the CLI's style of memory management and thread safety.
.NET/Mono applications can use legacy code, which is referred to as unmanaged , by using the System.InterOpServices libraries to create C# bindings.
Many of the libraries which ship with Mono use this feature of the CLI; in particular, the Gtk# libraries are C# wrappers around the underlying C libraries.
Common Language Infrastructure(CLI) == Common Language Runtime(CLR)??
Common Language Specification(CLS)
This is specified in ECMA-335 ,chapter 6. It defines the interface to the CLI
ECMA Standard 334 (http://www.ecma-international.org/publications/standards/Ecma-334.htm) , the C# language specification.
ECMA Standard 335 (http://www.ecma-international.org/publications/standards/Ecma-335.htm) , the Common Language Infrastructure.
Managed and Unmanaged Code
Within a native .NET/Mono application, all code is managed ; that is, it is governed by the CLI's style of memory management and thread safety.
.NET/Mono applications can use legacy code, which is referred to as unmanaged , by using the System.InterOpServices libraries to create C# bindings.
Many of the libraries which ship with Mono use this feature of the CLI; in particular, the Gtk# libraries are C# wrappers around the underlying C libraries.
Why Mono?
Digest of why Mono:
1. Very steep learning curve for developing Linux applications.
Most restricted to Python, Perl, C and C++.
2. Trend lends to managed runtime environments such as .NET and Java.
Java runtime is commonly available on Linux but lacks the demanded performance,
(? also Java applications do not conform to the Linux GUI look and feel.)
.NET and its new language, C#, offer the performance and appearance of native code.
With the Common Language Specification for compilers, code can be mixed freely across languages: Java, C, C#, C++, Python, and so forth.
In addition, .NET uses an intermediate compilation mechanism that allows cross-platform deployment of binary applications.
3. The Mono implementation of the .NET framework provides a superior development environment to quickly create various applications such as rich clients, web services and server-side applications, which can be deployed on Linux, Netware, MacOS and Microsoft Windows.
[ref] http://www.mono-project.com/Why_Mono%3F
1. Very steep learning curve for developing Linux applications.
Most restricted to Python, Perl, C and C++.
2. Trend lends to managed runtime environments such as .NET and Java.
Java runtime is commonly available on Linux but lacks the demanded performance,
(? also Java applications do not conform to the Linux GUI look and feel.)
.NET and its new language, C#, offer the performance and appearance of native code.
With the Common Language Specification for compilers, code can be mixed freely across languages: Java, C, C#, C++, Python, and so forth.
In addition, .NET uses an intermediate compilation mechanism that allows cross-platform deployment of binary applications.
3. The Mono implementation of the .NET framework provides a superior development environment to quickly create various applications such as rich clients, web services and server-side applications, which can be deployed on Linux, Netware, MacOS and Microsoft Windows.
[ref] http://www.mono-project.com/Why_Mono%3F
2008年8月21日 星期四
需求金字塔
//=== digest of http://en.wikipedia.org/wiki/Maslow%27s_hierarchy_of_needs
Maslow’s Hierarchy of Needs
a theory in psychology, proposed by Abraham Maslow in his 1943 paper "A Theory of Human Motivation,"
D-Needs(Deficiency needs):
physiological : food, air, water, sunlight, sex, sleep, excretion
safety: employment, property, health, body security from crime
social(Love/Belonging): friendship, intimacy, supportive family/network
esteem
B-Needs(Growth/Being Needs):
self-actualization/self-accomplishment
aesthetic:
//=== Criticism
"the hierarchy of needs is nothing more than a fool's daydream; there is no possible way to classify ever-changing needs as society changes"[6]. Chilean economist and philosopher Manfred Max Neef has also argued fundamental human needs are non-hierarchical, and are ontologically universal and invariant in nature - part of the condition of being human; poverty, he argues, is the result of any one of these needs being frustrated, denied or unfulfilled.
Maslow’s Hierarchy of Needs
a theory in psychology, proposed by Abraham Maslow in his 1943 paper "A Theory of Human Motivation,"
D-Needs(Deficiency needs):
physiological : food, air, water, sunlight, sex, sleep, excretion
safety: employment, property, health, body security from crime
social(Love/Belonging): friendship, intimacy, supportive family/network
esteem
B-Needs(Growth/Being Needs):
self-actualization/self-accomplishment
aesthetic:
//=== Criticism
"the hierarchy of needs is nothing more than a fool's daydream; there is no possible way to classify ever-changing needs as society changes"[6]. Chilean economist and philosopher Manfred Max Neef has also argued fundamental human needs are non-hierarchical, and are ontologically universal and invariant in nature - part of the condition of being human; poverty, he argues, is the result of any one of these needs being frustrated, denied or unfulfilled.
2008年8月20日 星期三
Exchange ratio
Exchange ratio
http://financial-dictionary.thefreedictionary.com/Exchange+Ratio
Exchange Ratio
The number of new shares in an acquiring firm that are given for each outstanding share of an acquired firm.
http://en.wikipedia.org/wiki/Respiratory_exchange_ratio
In one breath, you normally breathe in more molecules of oxygen than you breathe out molecules of carbon dioxide. The ratio between these CO2 / %O2 is the respiratory exchange ratio (RER).
http://au.biz.yahoo.com/forex-education/exchange-rates.html
the major currencies:
the US dollar (USD).
the Euro (EUR),
the Japanese yen (JPY),
the British pound sterling (GBP)
the Swiss franc (CHF)
the Australian dollar (AUD)
//=== bid/ask overhead/gap
For instance, the EUR/USD bid/ask currency rates at your bank may be 1.2015/1.3015, representing a spread of 1000 pips (also called points, one pip = 0.0001), which is very high in comparison to the bid/ask currency rates that online Forex investors commonly encounter, such as 1.2015/1.2020, with a spread of 5 pips ...
http://financial-dictionary.thefreedictionary.com/Exchange+Ratio
Exchange Ratio
The number of new shares in an acquiring firm that are given for each outstanding share of an acquired firm.
http://en.wikipedia.org/wiki/Respiratory_exchange_ratio
In one breath, you normally breathe in more molecules of oxygen than you breathe out molecules of carbon dioxide. The ratio between these CO2 / %O2 is the respiratory exchange ratio (RER).
http://au.biz.yahoo.com/forex-education/exchange-rates.html
the major currencies:
the US dollar (USD).
the Euro (EUR),
the Japanese yen (JPY),
the British pound sterling (GBP)
the Swiss franc (CHF)
the Australian dollar (AUD)
//=== bid/ask overhead/gap
For instance, the EUR/USD bid/ask currency rates at your bank may be 1.2015/1.3015, representing a spread of 1000 pips (also called points, one pip = 0.0001), which is very high in comparison to the bid/ask currency rates that online Forex investors commonly encounter, such as 1.2015/1.2020, with a spread of 5 pips ...
2008年8月19日 星期二
Mono
//=== http://www.mono-project.com/FAQ:_General
The Mono project implements various technologies developed by Microsoft that have now been submitted to the ECMA for standardization.
Mono is sponsored by Novell
Mono is the word for 'monkey' in Spanish.
Mono sparked/triggered C#-based components/Lib:
GTK#
#ZipLib
OpenGL's C# version -> Tao Framework
Mono.Cairo
Mono.Posix
Mono.Remoting
Mono.Http
Mono.Security
Mono.Math
Mono.XML
...
C#-related specs:
C# http://www.ecma-international.org/publications/standards/Ecma-334.htm
CLI http://www.ecma-international.org/publications/standards/Ecma-335.htm
//=== Companies using Mono
* Novell ZENworks
* MicroInvest (http://www.microinvest.net/en): is the biggest software providers for warehouse management applications in Bulgaria. Warehouse Open is warehouse management software written in C# and licensed under GPLv2...
* MindTouch (http://www.mindtouch.com/)
The Mono project implements various technologies developed by Microsoft that have now been submitted to the ECMA for standardization.
Mono is sponsored by Novell
Mono is the word for 'monkey' in Spanish.
Mono sparked/triggered C#-based components/Lib:
GTK#
#ZipLib
OpenGL's C# version -> Tao Framework
Mono.Cairo
Mono.Posix
Mono.Remoting
Mono.Http
Mono.Security
Mono.Math
Mono.XML
...
C#-related specs:
C# http://www.ecma-international.org/publications/standards/Ecma-334.htm
CLI http://www.ecma-international.org/publications/standards/Ecma-335.htm
//=== Companies using Mono
* Novell ZENworks
* MicroInvest (http://www.microinvest.net/en): is the biggest software providers for warehouse management applications in Bulgaria. Warehouse Open is warehouse management software written in C# and licensed under GPLv2...
* MindTouch (http://www.mindtouch.com/)
2008年8月12日 星期二
LZW features
1. Even for the single symbol, the number of encoded output bits may be different
2. ' ' is treated the same as 'A'/'B' ... ??
3. The compression ration is about 2:1 for long English texts.
4. It's part of the GIF as well as (optionally) used in TIFF files.
2. ' ' is treated the same as 'A'/'B' ... ??
3. The compression ration is about 2:1 for long English texts.
4. It's part of the GIF as well as (optionally) used in TIFF files.
2008年7月27日 星期日
SMS, MMS, WAP, GPRS, 3G
SMS, MMS, WAP, GPRS, 3G
SMS: short message service, text only, 160 chars
MMS: multimedia message service, richer contents, ...
WAP is based on SMS?
WAP is based on GPRS?
MMS is based on WAP?
3G also use GPRS?
SMS: short message service, text only, 160 chars
MMS: multimedia message service, richer contents, ...
WAP is based on SMS?
WAP is based on GPRS?
MMS is based on WAP?
3G also use GPRS?
2008年6月25日 星期三
Byte-oriented/Bit-oriented Compression
Byte-oriented Compression : zip, ...
Bit-oriented Compression: Huffman Code,
高師大十九年
有一位國中校長 丁文祺 ，今年已經四十六歲，在高雄師範大學念了十九年的書
拿了兩個學士 兩個碩士 一個博士學位
學歷：
高師大工教系74級畢業.
高師大英語系81級畢業.
高師大英語碩士88級結業.
高師大教育碩士90級畢業
//=== http://163.32.161.7/wenchi/
雲林縣台西國民小學 57年9月～63年6月
雲林縣台西國民中學 63年8月～64年7月
台北縣立五峰國民中學 64年8月～66年6月
台北市立復興高級中學 66年8月～69年6月
國立高雄師範學院 工業教育系 70年9月～74年6月
國立高雄師範大學英語學系 77年9月～81年6月
國立高雄師範大學 英語研究所碩士學分班 84年9月～88年6月
國立高雄師範大學 教育系學校行政碩士 87年9月～90年7月
國立高雄師範大學 成人教育博士生 93年8月～Present
拿了兩個學士 兩個碩士 一個博士學位
學歷：
高師大工教系74級畢業.
高師大英語系81級畢業.
高師大英語碩士88級結業.
高師大教育碩士90級畢業
//=== http://163.32.161.7/wenchi/
雲林縣台西國民小學 57年9月～63年6月
雲林縣台西國民中學 63年8月～64年7月
台北縣立五峰國民中學 64年8月～66年6月
台北市立復興高級中學 66年8月～69年6月
國立高雄師範學院 工業教育系 70年9月～74年6月
國立高雄師範大學英語學系 77年9月～81年6月
國立高雄師範大學 英語研究所碩士學分班 84年9月～88年6月
國立高雄師範大學 教育系學校行政碩士 87年9月～90年7月
國立高雄師範大學 成人教育博士生 93年8月～Present
2008年6月24日 星期二
Ubuntu 8.0.4 開機後螢幕變成一片黑暗(kernel 2.6.24-19-generic)
Ubuntu 8.0.4 kernel 2.6.24-19-generic
開機後螢幕變成一片黑暗
按鍵盤也沒反應
重開機兩次 結果相同
執行 kernel 2.6.24-19-generic recovery mode
恢復正常
問題何在？
Xorg?
開機後螢幕變成一片黑暗
按鍵盤也沒反應
重開機兩次 結果相同
執行 kernel 2.6.24-19-generic recovery mode
恢復正常
問題何在？
Xorg?
訂閱：
意見 (Atom)