Herong's Tutorial Examples

Ethereum Tutorials - Herong's Tutorial Examples
This book is a collection of tutorial examples on Ethereum and blockchain. Topics include include: What is Ethereum; What is blockchain; Ethereum market value; What is Go Ethereum (Geth); Running a private Ethereum network with Geth; What is Ethereum Mist wallet; What is MetaMask wallet; Ethereum mi... 2022-07-10, 3454👍, 4💬

<< < 1 2 3 4 5 6 7 8 … > >> Sort: Rank

Registry Hives - HKCR, HKCU, HKLM, HKU, HKCC, and HKPD
This section provides quick introductions on the Windows registry hives - top level registry keys on Windows XP systems. 2022-06-27, 22964👍, 3💬

💬 2022-06-27 Lukugo: clean

💬 2019-08-21 le hunter: ███░░░░░le░░░░░░░░░░░░░░░░░░░░░░░░░░ ░██░░░░░░hunter░░░░░░░░░░░░░░░░░░░░░░ ...

💬 2015-09-27 le toucan: ░░░░░░░░▄▄▄▀▀▀▄▄███▄░░░░░░░░░░░░░░░░ ░░░░░░▄▀▀░░░░░░░▐░▀██▌░░░░░░░...

First 8336 Hex Digits of PI
This section provides first 8336 hex digits of constant PI, 3.1415927..., needed for Blowfish encryption algorithm. 2022-06-26, 6555👍, 11💬

💬 2019-04-28 Herong: 8336 Hex Digits. Thanks.

💬 2019-04-26 Harry: Do you mean 8336 digits

💬 2016-10-31 Andres: cool

💬 2016-04-07 Tamas Losonczi: This is great

💬 2016-03-15 Bogdan: Thanks!

(More comments ...)

My First JSP Page on macOS
This section provides a tutorial example on how to create the first JSP page with JSP code to test the JSP support of the Tomcat Web server on macOS systems. 2022-06-24, 164👍, 1💬

💬 2022-06-24 Chris: Thank you. Because of you I could run my first JSP file :)

Creating Class Type Objects
This section describes how class type objects can be created using the 'new' operator and special methods. 2022-06-24, 115👍, 1💬

💬 2022-06-24 waryam: ok

Measuring Speed of Light - Roemer's Method
This section describes the method used by Ole Roemer to measure the speed of light using changes of observed eclipse periods of Jupiter's moon. 2022-06-22, 212👍, 2💬

💬 2022-06-22 nina: :))))

Blowfish - 8-Byte Block Cipher
This chapter provides tutorial examples and notes about Blowfish block cipher. Topics include Blowfish encryption and decryption algorithm; Blowfish sub-key generation schema, Blowfish algorithm implementation in Java. 2022-06-21, 574👍, 3💬

💬 2022-06-21 sad: hello world

💬 2019-12-16 gio: i love you

Examples of CP1252 and ISO-8859-1 Encodings
This section provides examples of encoded byte sequences of the JVM default encoding, CP1252 encoding, on a Windows system. The ISO-8859-1 encoding is slightly different that the CP1252 encoding. 2022-06-21, 2660👍, 3💬

💬 2020-02-24 Muhammad Ijaz: i am Muhammad Ijaz

Get Free Ether from faucet.ropsten.be
This section describes how to get some free Ether from faucet.ropsten.be. 2022-06-21, 7318👍, 70💬

💬 2022-06-21 mikz: 0x9A9Db6f0DCd8d78208Bf1727a15b2A4Efd a13D05300 test eth ilove you guys

💬 2022-06-20 0x6a411Be2a84eaf31d9F6092CA08F36: 0x6a411Be2a84eaf31d9F6092CA08F364Fb9 Fe1350

💬 2022-05-28 Herong: Test Ethers sent.

💬 2022-05-27 ejk: 0x786f2E40C95689a8294B91cb3353Fe87Bf 383C1Fplease ether

💬 2022-05-21 EJ: I need ether 0xfbB088f4cEd330fB0Abb5181D2834e21b6 19c53C

(More comments ...)

JPEG Image File Format Quality and Size
This chapter provides tutorial notes and example codes on JPG (JPEG) image file format. Topics include saving images in JPEG format; comparing file sizes of JPEG and BMP formats; comparing image quality and file size of JPEG compression quality levels: 95%, 90%, 85%, 75%, 50%, and 25%. 2022-06-20, 153👍, 2💬

💬 2022-06-20 buypassportsonline: BUY REGISTERED PASSPORTS,DRIVERS LICENSE ONLINE(Whatsapp:+19254121971)(puredo cuments21@gmail.com)Have you been looking for a pa...

"g++ -l..." to Link with Library Files
This section provides a tutorial example on how to use 'g++ -static' and 'g++ -l...' options to link your program with static or dynamic library files. 2022-06-20, 393👍, 2💬

💬 2022-06-20 AA: hello

Web Server Log File Samples - IIS and Apache
This section provides a quick introduction of Web server log files with examples of IIS and Apache servers. 2022-06-20, 32101👍, 33💬

💬 2022-06-20 Manish Raj: Nice

💬 2022-04-22 rs: thank you

💬 2021-12-08 nice: nice

💬 2020-11-25 naga pavan: Nice

💬 2020-07-21 yadana: thanks

(More comments ...)

GB2312Unicode.java - GB2312 to Unicode Mapping
GB2312Unicode.java is a Java program that generates a table to map all GB2312 characters from GB2312 Codes to Unicode Codes. 2022-06-18, 1628👍, 4💬

💬 2022-06-18 dirk: Yeah, Herong, you are right. And, The Unicode Consortium gives mappings(mappings between unicode and other character sets) on it...

💬 2022-06-17 Herong: dirk, I think JDK uses a long array to map each GBK character to a Unicode.

💬 2022-06-15 dirk: But, how the decoder map GBK to UTF16 in this statement "cb = gbdc.decode(gbbb);"? In other words, how does "deocde(ByteBuffer b...

💬 2018-01-27 kill_time: hehe，

Uninstall Bitcoin Core for Windows
This section describes how to uninstall Bitcoin Core for Windows. 2022-06-18, 1366👍, 62💬

💬 2022-06-18 firwarehacks: ⚠️CRYPTO TRADING SCAM ALERT⚠️ ❌ Crypro Trading, Forex Trading, Stock Trading and their likes are a means of making money but i...

Data Literals Supported in PHP
This section describes data literals to specify values for different data types: reserved key words; decimal, octal and hexadecimal numbers; floating point number format; single quoted, double quoted, and heredoc strings. 2022-06-17, 132👍, 2💬

💬 2022-06-17 Herong: Yes. I missed the binary form of integers. It will be included in the next update. Thanks.

💬 2022-06-10 X: You forgot binary literals for integers: 0b00101010

ChangeLengthUnit - Usage Description
This section describes the free Web service ChangeLengthUnit provided by WebserviceX.NET. ChangeLengthUnit allows you to convert length values in Millimeters, Centimeters, Inches, Feet, Yards, Meters, Kilometers, Miles and more. 2022-06-16, 597👍, 4💬

💬 2020-11-23 mmm: hello world

💬 2020-08-20 Herong: Mike, I don't have the source code. Hope someone can develop one. It shouldn't that hard.

💬 2020-08-18 Mike: The service is no longer available at that URL. Any chance you can release the source code so someone can re-host it?

Full Version in PDF/EPUB
Information on how to obtain the PDF version of this book for printing. 2022-06-12, 615👍, 2💬

💬 2019-03-14 Edmond: Thanks

Ethereum Public Key and Private Key Example
This section describes examples of public key and private key of an Ethereum account. 2022-06-09, 17510👍, 33💬

💬 2022-06-09 ben: hello

💬 2022-05-15 helpinghands: 0x365F9713D8C7A9a1BeC0a580291D43424e 925B97this is our ether account address. anyone who is donating extra etherum for a good ca...

💬 2022-04-20 Satya: b690c0753f03092e02d18d097a5473c205e2 affc41229a34c69c39c0c587d49b

💬 2022-04-20 sag: 0xDDc09B681fD9c9D428690Df42a8C544458 508d84

💬 2022-04-18 jhonu: 0x09aab1e73d28ac951d7104b877f070d487 5c606d

(More comments ...)

native2ascii - Native-to-ASCII Encoding Converter
This chapter provides tutorial notes on the native-to-ASCII encoding converter 'native2ascii'. Topics include 'native2ascii' command options, default encoding CP1252 used by 'javac', converting UTF-8 characters into \uXXXX Unicode code sequences, converting \uXXXX sequences back to native encodings. 2022-06-09, 5719👍, 64💬

💬 2022-06-09 hupo: (É+ó)+(ó+ó)+'\'

💬 2022-05-29 aaa: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2022-03-13 Q: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2022-01-30 paul: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

💬 2021-10-13 dams: É=-~-~[],ó=-~É,Ë=É<<É,þ=Ë+~[]; Ì=(ó-ó)[Û=(''+{})[É+ó]+(''+{})[ó-É]+ ([].ó+'')[ó-É]+(!!''+'')[ó]+({}+'')[ ó+ó]+(!''...

(More comments ...)

DES Key Schedule (Round Keys Generation) Algorithm
This section describes DES (Data Encryption Standard) algorithm - A 16-round Feistel cipher with block size of 64 bits. 2022-06-06, 13230👍, 12💬

💬 2022-06-06 hello: <script> alert("Hello! I am an alert box!"); </script>

💬 2018-02-24 Herong: hema, values in the pc-2 table are pre-defined by the algorithm. They are not calculated.

💬 2018-02-23 hema: i understood pc-1 table can you pls guide to calculate manually pc-2 table in des algorithm.

💬 2017-10-24 Herong: QuAI, you are right those bits are not used in the Permuted Choice 1 (PC1) table.

💬 2017-10-19 QuAl: And forget about bits 8, 16, ..., 64 of initial кey K! Those bits for parity check only (see FIPS 46-3)

(More comments ...)

Testnet - Ropsten network
This chapter introduces Ethereum testnet: Ropsten network. 2022-06-06, 648👍, 2💬

💬 2022-06-06 myth: 0x339d58bff8b8C5dAAfaF08fA77ad39C790 9B194E

💬 2021-08-28 Cit: Hi

Free Chinese Calendar 2022 - Year of the Tiger
Want to know when is the 2022 Chinese New Year day? Look for free Chinese calendars for 2022? Chinese New Year Date for Year 2022 The Tiger2022February 1TuesdayChinese New Year ⇒ Free Chinese Calendar 2023 - Year of the Rabbit ⇐ Free Chinese Calendar 2021 - Year of the Ox ⇑ Chinese New Year Dates... 2022-06-05, 332206👍, 21💬

💬 2022-06-05 Judith Harl: Love Chinese New Year Calendars so interesting and educational

💬 2022-04-23 Mme. Fiona Rose Lace AY: Ni hao ma! May I please receive 1 Chinese 2022-3 Calendar with Poppies&Dragon? No printer 18225 Hale Ave Ste 213 Morgan Hill...

💬 2022-03-27 Herong: Jari, Again. there is no need to add 1 to the calculation. Just think about the first year of the Chinese calendar. It should be...

💬 2022-03-13 Jari: In Julian calender there is not a year 0, it started 1.1.1 but there was a year, so timecalculation jumps one year over from yea...

💬 2022-03-13 Herong: Jari, I don’t see any reason for the +1 in the calculation.

(More comments ...)

JDBC-ODBC - Configuring SQL Server for TCP/IP Connection
This section describes how to configure SQL Server for TCP/IP connections. 2022-06-05, 612👍, 4💬

💬 2022-06-05 Faith Legacy: Thanks. This really helped me

💬 2018-03-07 mohamed: Thanks

What Is DER (Distinguished Encoding Rules) Encoding?
This section describes the DER (Distinguished Encoding Rules) - A binary format of encoding a data value of any data types including nested data structures. 2022-06-03, 21139👍, 9💬

💬 2018-10-29 Thanks!: meaningful comments.

💬 2017-03-15 noname: thanks

💬 2016-01-25 Dev: hello

Email Messages with Attachments using MIME
This section provides an email message example with an attachment using the MIME (Multipurpose Internet Mail Extensions) protocol. The message is divided into multiple parts with each part using different content type. 2022-06-03, 299👍, 1💬

💬 2022-06-03 test: thank

<< < 1 2 3 4 5 6 7 8 … > >> Sort: Rank