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Illustration of RSA Algorithm: p,q=5,7
This section provides a tutorial example to illustrate how RSA public key encryption algorithm works with 2 small prime numbers 5 and 7.
2019-01-21, 208👍, 2💬

💬 2019-01-21 Herong: someone, why 35 and 5 must be coprime numbers?

💬 2019-01-16 someone: >Compute n = p*q: n = 5*7 = 35 >Compute m = (p-1)*(q-1): m = 4*6 = 24 >Select e, such that e and m are coprime numbers: e = 5 35...

Viewing Data CD Track Layout
This section provides a tutorial on how to view the track and file system layout of a Data CD with IsoBuster.
2019-01-21, 119👍, 2💬

💬 2019-01-21 Herong: Tyler, Just curious, why you are still using CD?

💬 2019-01-13 Tyler: CD tutoria good.

French Characters in HTML Documents - ISO-8859-1 Encoding
This section provides a tutorial example on how enter and use French characters in HTML documents using Unicode ISO-8859-1 encoding. The HTML document should include a meta tag with charset=ISO-8859-1 and be stored in ANSI format.
2019-01-21, 265👍, 3💬

💬 2019-01-21 Herong: etwt, Which number is invalid?

💬 2019-01-10 etwt: Numéro invalide

Building Chinese Web Sites using PHP
It can be used as a tutorial guide for beginners. Topics include installing PHP and Tomcat; creating PHP pages; displaying pages in Chinese; saving Chinese characters to MySQL database; fetching Chinese characters from MySQL database.
2019-01-21, 2981👍, 6💬

💬 2019-01-21 Herong: Yashwant, Is the Website in Chinese or English?

💬 2019-01-10 Yashwant: Hi Sir, I am a php developer.. How i can create a website for china..

💬 2015-12-08 Herong: Rob, 欢迎你的访问!But I can only support shared links with technical contents.

💬 2015-12-07 rob: 我是一个母语为英语的php 开发者 。。。 your site is great! [URL removed]

💬 2013-10-27 Herong: Alexis, you are most welcome!

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PDF打印版: 中国经典音乐
Information on how to obtain the PDF version of this book for printing.
2019-01-21, 147👍, 2💬

💬 2019-01-12 Herong: Erik, I do not have sheet music in the book.

💬 2019-01-06 Erik: Is the sheet music in the book for piano? Thank you.

'native2ascii' - Encoding Converter Command and Options
This section describes the native-to-ASCII encoding converter 'native2ascii' and its options. Non-ASCII characters in a Java source file must be converted into \udddd Unicode sequences before giving it to the Java compiler.
2019-01-19, 1334👍, 12💬

💬 2019-01-19 bb: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2018-10-24 gggg: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2018-10-20 Herong: nb, that's interesting new version of the same JavaScript code: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; ...

💬 2018-10-14 nb bbb: \u00c9=-~-~[],\u00f3=-~\u00c9,\u00cb =\u00c9<<\u00c9,\u00fe=\u00cb+ ~[];\u00cc=(\u00f3-\u00f3)[\u00db=(' '+{})[\u00c9+\u00f3]...

💬 2018-08-17 sd: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

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Relativity of Simultaneity in Minkowski Diagram
This section provides a demonstration of the relativity of simultaneity phenomenon using a Minkowski diagram.
2019-01-17, 112👍, 1💬

💬 2019-01-17 hiroji kurihara: Relativity of simultaneity From just above, plane waves of star light are coming horizontally. An observer stands on the ground ...

Downloading and Installing Flex SDK 4.1
This section provides a tutorial example on how to download and install Adobe Flex SDK 4.1 on Windows system.
2019-01-09, 1738👍, 12💬

💬 2019-01-09 jack: thank you

💬 2018-02-27 syy: 谢谢 谢谢 谢谢 谢谢

💬 2018-02-27 sunyuanyuan: thank you

💬 2018-01-02 cloud: nice

💬 2017-10-25 netfbi: Thanks!Thanks!Thanks!Thanks!Thanks!T hanks!Thanks!Thanks!Thanks!Thanks!

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Creating Tables with AUTO_INCREMENT Columns
This section describes how to create a table with an AUTO_INCREMENT column.
2019-01-03, 1359👍, 4💬

💬 2016-01-22 gokul: useful

GB2312 vs. Unicode
A quick introduction of GB2312 is provided. Topics include GB2312 character set; Location Codes; Native Codes; Unicode; GBK encoding and Unicode character set.
2019-01-03, 907👍, 6💬

💬 2019-01-03 qq: Thanks!

💬 2018-06-13 linfeng: This works finally. Thanks so much.

💬 2017-06-07 XuL: helpful.thx

💬 2016-02-15 Herong: Kunhai, you can run my Java program to generate the map. See GB2312Unicode.java - GB2312 to Unicode Mapping.

💬 2016-02-15 kunhai huang: i need the map

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Lock Types and Lock Levels
This section describes 2 types of locks: Read Lock (Shared Lock) and Write Lock (Exclusive Lock), and 3 levels of locks: Table Lock, Row Lock, and Column Lock.
2019-01-02, 1205👍, 2💬

💬 2016-10-31 Shivin: haha very good

Tutorial Book List
Tutorial Books: Android Tutorial Examples Bitcoin Tutorial Examples C# Tutorial Examples Cryptography Tutorial Examples Data Encoding Tutorial Ethereum Tutorial Examples Flash Tutorial Examples Free Web Services GB2312 Character Set HTML Tutorial Examples Java Tutorial Examples JDK Tutorial Examples...
2019-01-01, 305👍, 0💬

Ethereum Tutorials - Herong's Tutorial Notes
This free book is a collection of tutorials and notes on Ethereum and blockchain. Topics include Blockchain, Ethereum, Cryptocurrency, Mining, MetaMask, Wallet.
2019-01-01, 763👍, 2💬

💬 2018-05-11 meizumx4pkwn: tanxs so much Doc..request to share this to myFam n Frenz..

💬 2018-03-11 Ed: Thanks!

Java GC Tutorials - Herong's Tutorial Examples
This book is a collection of tutorial notes and sample codes written by the author while he was learning JVM GC (Garbage Collection) processes. Topics include Java Garbage Collectors, STW (Stop-The-World), Serial Collector, Parallel Collector, Concurrent Collector, G1 Collector, GC Algorithms, Gener...
2019-01-01, 605👍, 1💬

💬 2018-06-17 Jack: It's helpful!

UTF-16LE Encoding
This section provides a quick introduction of the UTF-16LE (Unicode Transformation Format - 16-bit Little Endian) encoding for Unicode character set. UTF-16LE is a variation of UTF-16.
2018-12-29, 5698👍, 7💬

💬 2018-12-29 test: thank

💬 2016-12-21 task go: thank you

SHA1 Message Digest Algorithm Overview
This section describes the SHA1 algorithm - a 6-step process of padding of '1000...', appending message length, preparing 80 process functions, preparing 80 constants, preparing 5 word buffers, processing input in 512 blocks.
2018-12-28, 11188👍, 7💬

💬 2018-12-28 '">alert(2): '">&lt;script>alert(1)&lt;/s cript>

💬 2017-10-26 Herong: Jamal, w(0), ..., w(15) are initial values. w(16), ..., w(79) are used on the left side of the assignment operator to store stor...

💬 2017-10-25 Y. Jamal: Hi, we have w(0), w(1),....w(15) how come in the For loop we have W(t) and t goes from 16 to 79. something is not right.

💬 2017-09-29 Herong: I don't think it takes the length of bits. But I will double check it.

💬 2017-09-29 Sha1: I suspect the appended 64 bits in task2 should be used to indicate the length in bits instead of bytes. Reference: https://csrc....

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Downloading and Installing XML Notepad
This section provides a tutorial example on how to download and install XML Notepad 2007 on Windows systems.
2018-12-27, 149👍, 1💬

💬 2018-12-27 Raj: Thanks

Downloading and Installing JDK 10
This section describes how to download and install JDK 10 on a Windows system.
2018-12-23, 48197👍, 46💬

💬 2018-12-23 Thin Ga Ha: Very good

💬 2018-10-22 Chirag: Very good

💬 2018-09-02 Herong: Paul, thanks. Picture is added now.

💬 2018-08-30 Paul: This picture is missing.

💬 2018-08-19 Pia: Hello how are you?

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PHP Implementation of DES - mcrypt
This chapter provides tutorial examples and notes about PHP implementation of DES. Topics include introduction of mcrypt library; mcrypt encryption functions; DES encryption and decryption test program and test result.
2018-12-22, 1543👍, 4💬

💬 2018-12-22 Hari: Hello

💬 2016-01-02 sivaprakash: nice

Compilation and Execution Process of C Programs
This section describes steps of the compilation and execution process of C programs: preprocessing, compilation, assembly, linking and loading.
2018-12-22, 54542👍, 23💬

💬 2018-12-22 Ishika Garg: nice

💬 2018-11-29 manasi chavan: Thanks!!!!!!nice

💬 2018-09-15 hardik bhoraniya: nice understanding

💬 2018-05-17 Khan rahil: Thanks

💬 2018-05-17 Ankit Kannaujiya: I am not satisfie

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Using java.net.HttpURLConnection to Send SOAP Messages
This section describes steps to follow if you want to use the java.net.HttpURLConnection class to send out a SOAP XML message.
2018-12-21, 29507👍, 13💬

💬 2018-12-21 Herong: RAS, Yes. That's a good example on sending a file as a SOAP attachment. I thought you were looking for example on sending files ...

💬 2018-12-18 RAS: Thanks Dr. Herong for your reply. I've gone through the link you've shared but in that way, there's no way to pass other paramet...

💬 2018-12-18 Herong: RAS, Sending (or uploading) files from a client depends what how the server want to receive them. If the server support multipar...

💬 2018-12-17 RAS: Thanks Dr. Herong for the link but I'm not able to convert it to a sample codeset. Can you help me with it?

💬 2018-12-16 Herong: RAS, if you want to send a file with HTTP POST method, check RFC 1867 - Form-based File Upload in HTML.

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The Constancy of the Speed of Light
This section provides a thought experiment to help understanding the second assumption of the special theory of relativity: The constancy of the speed of light.
2018-12-18, 125👍, 2💬

💬 2018-12-18 Herong: Hiroji, Thanks for sharing your comment and the article. I will definitely read it.

💬 2018-12-17 hiroji kurihara: Speed if Light On everything of a light ray before incoming (on wavelength, amplitude, waveform, etc and on these varying), obse...

DES Algorithm Java Implementation
This chapter provides tutorial examples and notes about DES algorithm implementation in Java language. Topics include an example Java implementation of DES encryption and decryption algorithm; test cases of single block cleartext and ciphertext.
2018-12-13, 6343👍, 16💬

💬 2018-12-13 syed zia ur rehman: i realy like your link

💬 2017-10-15 Herong: CipherDES.java also works as a decryption program. Try it by running "java DesCipher decrypt keyFile input output".

💬 2017-10-09 aa: thanks, but where i can find DES decryption

💬 2017-10-09 Denys: thx

💬 2017-04-23 aa: thanks

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Downloading and Installing Visual C# 2010 Express
This section provides a tutorial example on how to download and install Microsoft Visual C# 2010 Express edition on Windows systems.
2018-12-08, 3331👍, 15💬

💬 2018-12-08 Herong: huchen, Visual C# is not too bad. I need to update this with Visual Studio Express 2017, when I get a chance.

💬 2018-12-06 huchen: i like this

💬 2018-11-08 LIcc: good!try

💬 2018-09-18 fang: i want to study C# , thank you for your support to us this soft

💬 2018-08-16 bean: very intesting

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