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... 2018-06-17, 290👍, 1💬
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. 2018-05-11, 431👍, 2💬
Introduction to DES Algorithm
This chapter provides tutorial examples and notes about DES (Data Encryption Standard) algorithm. Topics include description of block cipher, DES encryption algorithm, Round Keys Generation, DES decryption algorithm. 2018-01-22, 149👍, 2💬
printenv.pl - Testing Perl CGI Environment
This section provides a tutorial on how to modify the Perl CGI test script, printenv.pl, and run it to verify Apache 2 Perl CGI configuration. 2018-01-21, 139👍, 3💬
"openssl enc" Converting Keys from Binary to PEM
This section provides a tutorial example on how to convert a private and public key pair stored in binary PKCS#8 format into PEM (Privacy Enhanced Mail) format with the 'openssl enc' command. 2018-01-20, 375👍, 2💬
cgi-lib.pl - The Standard Library for CGI Scripts
This section describes the de facto standard library, cgi-bin.pl, for Perl CGI scripts. It also provides a tutorial on how to download and install cgi-bin.pl 2.18 to the Apache server on a Windows system. 2018-01-20, 189👍, 2💬
DES Decryption Algorithm
This section describes DES decryption algorithm - identical to the encryption algorithm step by step in the same order, only with the subkeys applied in the reverse order. 2018-01-20, 429👍, 2💬
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. 2018-01-18, 4816👍, 6💬
java.time.Duration - Time Durations
This section describes the java.time.Duration class that represents a duration of time measured in seconds with fractions in nanosecond resolution. 2018-01-03, 212👍, 1💬
2-Step Message Encryption - Symmetric and RSA
This section describes how SoapUI performs the SOAP message entryption in 2 steps: encrypt the SOAP message with random secret key and encrypt the secret key with receiver's RSA public key. 2017-12-31, 216👍, 1💬
Variable Declaration and "Dim" Statement
This section provides a quick introduction of what is a variable and how variable can be declared explicitly with a Dim statement and implicitly with an assignment statement. 2017-12-30, 3306👍, 3💬
File_Input_Output_Test.php - File Input/Output Examples
This section provides a tutorial example script on how to use file input and output functions like fopen(), fread(), fwrite(), and fclose(). The example script copies any file in binary mode. 2017-12-28, 144👍, 3💬
OpenSSL Introduction and Installation
This chapter provides tutorial notes and example codes on OpenSSL. Topics include introduction of OpenSSL; installing OpenSSL on Windows systems. 2017-12-24, 732👍, 4💬
Downloading and Editing WSDL Document
This section provides a tutorial example on how to download the WSDL document from the Web service provider. You can change port.address[@location] to a localhost URL to local testing. 2017-12-18, 22142👍, 11💬
Reciprocity of Time Dilation
This section introduces the reciprocity of time dilation. Elapsed time of a moving clock is slower when measured by a stationary observer; and elapsed time of a stationary clock is slower when measured by a moving observer. 2017-12-09, 280👍, 2💬
What Is SHA1 Message Digest Algorithm?
This section describes what is SHA1 (Secure Hash Algorithm 1) - a message digest algorithm which takes as input a message of arbitrary length and produces as output a 160-bit 'fingerprint'. 2017-12-09, 4387👍, 6💬
XML Editor and Schema Processor - XMLPad
This chapter provides notes and tutorial examples on the free XML editor and XML Schema processor, XMLPad. Topics include installing WMHelp XMLPad Pro, assigning XML Schema to XML documents, validating XML documents, generating XML schema diagram. 2017-12-04, 503👍, 1💬
This section provides a tutorial example on how to use SHA1 message digest algorithm in Java. The JD...
This section describes the MD5 algorithm - a 5-step process of padding of '1000...', appending messa...
This section describes steps of the compilation and execution process of C programs: preprocessing, ...
This web site provides a collection of about 40 free tutorial books on programming languages, Web ap...
This section provides a tutorial example on how to use 'keytool' to import certificates in DER and P...