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💬
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💬
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💬
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💬
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💬
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💬
"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💬
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💬
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💬
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💬
Testnet - Ropsten network
This chapter introduces Ethereum testnet: Ropsten network. 2022-06-06, 648👍, 2💬
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💬
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💬
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💬
This section provides a tutorial example on how to download and install JDK 1.7.0 (Java SE 7) on a W...
This section introduces Lorentz Factor, which is the factor used in the time dilation and other form...
This section provides tutorial example on how to generate a digital signature for a message file wit...
This section describes how to SQL Server command line tool - SQLCMD.
This section provides a tutorial example on how to use the static methods, showInternal*Dialog(), to...