Ethereum 101

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Ethereum is a decentralized blockchain platform that enables developers to build and deploy decentralized applications (dApps) on the blockchain. Ethereum was created in 2014 by Vitalik Buterin and has since become one of the most popular blockchain platforms in the world. In this article, we’ll provide a development history of Ethereum, an overview of its
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Resource Acquisition Is Initialization (RAII) in C++ with Detailed Examples

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In this post, we will discuss Resource Acquisition Is Initialization (RAII), a programming idiom in C++ that helps manage resources such as memory, file handles, and network connections. By leveraging constructors, destructors, and scope-bound resource management, RAII enables the creation of more reliable and maintainable C++ code. RAII can not only achieve mostly what a
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Splitting a String by Another String in C++: A Flexible Utility Function

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In this post, we will explore a flexible utility function for splitting a string based on a given delimiter using C++ and the standard library. This allows us to break down complex strings into smaller parts that are easier to process and manipulate. The C++ Utility Function to Split a String by Another String Background:
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Installing Zlib in Ubuntu 22.04

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Zlib is a popular open-source compression library used by many software applications to compress and decompress data. It provides fast and efficient compression and decompression algorithms that can be used to reduce the size of data, which can improve performance and reduce storage requirements. In this post, we will discuss how to install zlib in
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Release Notes For Linux v2.0

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This is the release notes for linux release v2.0 (source code: linux-2.0.tar.gz) with format adjusted by removing/replacing tabs/spaces/new lines/formatting marks. This notes document can give us an understanding of the early development of the Linux kernel. The original ASCII formatted version is at the end of this post. Intro This document contains a list of
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Release Notes For Linux v1.0

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This is the release notes for linux release v1.0 (source code: linux-1.0.tar.gz) with format adjusted by removing/replacing tabs/spaces/new lines. This notes document can give us an understanding of the early development of the Linux kernel. The original ASCII formatted version is at the end of this post. CHANGES since 0.99 patchlevel 15: removed all the
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Release Notes For Linux v0.95a

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This is the release notes for linux release v0.95a (source code: linux-0.95a.tar.gz) with format adjusted by removing/replacing tabs/spaces/new lines. This notes document can give us an understanding of the early development of the Linux kernel. The the formatted version of the referenced RELNOTES-0.95 can be found at Release Notes For Linux v0.95. The original ASCII
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Release Notes For Linux v0.95

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This is the release notes for linux release v0.95 (source code: linux-0.95.tar.gz) with format adjusted by removing/replacing tabs/spaces/new lines. This notes document can give us an understanding of the early development of the Linux kernel. The original ASCII formatted version is at the end of this post. RELEASE NOTES FOR LINUX v0.95 Linus Torvalds, March
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Release Notes For Linux v0.01

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This is the notes for linux kernel release 0.01 (source code: linux-0.01.tar.gz) with format adjusted by removing/replacing tabs/spaces/new lines. This notes document can give us an understanding of whether the Linux kernel started with its very first release. The original ASCII formatted version is at the end of this post. Notes for linux release 0.01
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Converting Int to String in C++

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It is common to convert an integer (int) to a string (std::string) in C++ programs. Because of the long history of C++ which has several versions with extended libraries and supports almost all C standard library functions, there are many ways to convert an int to string in C++. This post introduces how to convert
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How to Convert Integers to Strings and Strings to Integers in PHP

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Conversion from integer to string and from string to integer are common operations in most applications such as C++. PHP has its uniqueness in language and standard library design. In this post, we will check methods to convert integers to strings and vice versa. Convert string to int in PHP You can cast a string
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Generating a Pair of RSA Private and Public Keys in Linux using OpenSSL

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RSA (Rivest–Shamir–Adleman) is a widely used public-key cryptosystem that is used for secure communication over the internet. In this post, we will explore how to generate a pair of RSA private and public keys in Linux using the OpenSSL library. Generating a pair of RSA private and public keys in Linux using OpenSSL is a
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How to Statically Link OCaml Programs

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Static linking is preferred for some cases although it has its own various problems. Static building/linking is not always possible for some languages on some platform. For OCaml, the answer to this question is yes. In this post, we will introduce 2 methods to statically linking OCaml: static linking with runtime glibc required and static
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How to get date and time from another timezone in Python?

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How to get the date and time from another timezone in Python? You may use the pytz library. Example usage as follows. $ python3 Python 3.8.2 (default, Jul 16 2020, 14:00:26) >>> from datetime import datetime >>> import pytz >>> >>> print(datetime.now(pytz.timezone(‘Europe/Amsterdam’)).strftime(‘%Y-%m-%d %H:%M:%S %Z%z’)) 2020-08-09 15:50:00 CEST+0200 >>>

Installing Zlib from Source Code in Ubuntu Linux

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Zlib is a popular open-source compression library used by many software applications to compress and decompress data. While it can be installed in Ubuntu using the apt package manager, you may need to install it from the source code if the version available in the Ubuntu repositories is outdated or if you need to customize
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Handling Sparse Files on Linux

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Sparse files are common in Linux/Unix and are also supported by Windows (e.g. NTFS) and macOSes (e.g. HFS+). Sparse files uses storage efficiently when the files have a lot of holes (contiguous ranges of bytes having the value of zero) by storing only metadata for the holes instead of using real disk blocks. They are
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