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  What can select do in GoLang

In Go language, select is a keyword used to listen to and perform IO operations related to channels. With the select statement, we can simultaneously listen to multiple channels and perform corresponding operations when any of the channels are ready. This article will summarize the common uses of the select statement and provide some considerations when using it. Basic syntax The basic syntax of the select statement is as follows: select { case <-channel1: // when channel1 has data to ...

   GOLANG,SELECT,USAGE,SYNTAX,TUTORIAL     2023-08-12 20:17:02

  Handling Chinese Character Encoding Issues in Oracle Database

When working with Chinese data in Oracle databases, character encoding issues often lead to garbled text, preventing proper display and processing. This is typically because the default character set in Oracle is US7ASCII, which cannot recognize Chinese characters. By modifying the character sets of the database, client, and application, data can be converted to the correct character set, thus avoiding garbled text issues. This article introduces several methods to resolve Chinese character enco...

   ORACLE,CHINESE CHARACTER,UNICODE,DATABASE     2024-07-12 21:09:14

  Tips for improving PHP efficiency

0. Using single quote to replace double quote to enclose string literal, this will be a bit faster. Because PHP engine will search variables in double quoted string. 1. If a method in class can be declared as static, then make it static, this will be 4 times faster. 2. $row["id"] is 7 times faster than $row[id] 3. echo is faster than print, and you should use multiple parameters instead of string concatenation, i.e use comma(,) instead of dot(.) to concatenate string. For example echo $str1,$str...

   PHP, efficiency, tips     2012-10-01 19:39:06

  Unknown system variable 'query_cache_size' in DbVisualizer while accessing MySQL

DbVisualizer is a very popular GUI application to view the data stored on a database. It supports various databases such as Oracle, MySQL etc. It relies on different database drivers to connect to the database server and access the data stored there.  In this post, we will try to solve one problem when accessing the latest MySQL database(8.0+) through DbVisualizer. MySQL database starting from 8.0 has lots of changes which may not be compatible with old version of software or libraries whic...

   MYSQL,MYSQL 8,DBVISUALIZER,QUERY_CACHE_SIZE     2018-06-30 03:48:17

  First Touch on OpenAI API

It’s been a while since ChatGPT launched, and I’ve been meaning to try out the OpenAI API. Recently, I finally took the plunge, so here’s a walkthrough of my initial experience using it. Objective: I’ve previously used ChatGPT’s interface for language translation tasks between Chinese and English. For this API experiment, I aimed to set up a simple translation function using the OpenAI API. Step 1: Getting the API Key First, to access the API, I created an OpenAI ac...

   TUTORIAL,API,TRANSLATION,OPENAI,FREE ACCOUNT     2024-11-11 22:25:07

  About go get and go install in Go 1.16

Go version 1.16 beta1 has been released on 18 Dec 2020, major features of Go 1.16 have been finalized with this beta release. Many people are discussing about the support of Apple M1, however, this post will not cover this topic. Instead the focus will be on go get and go install changes. There are lots of changes related to modules in Go 1.16, the details can be found in the release note. Below are some of the key highlights. GO111MODULE is on by default, if wanna keep old behavior, needs...

   GOLANG,GO 1.16,GO INSTALL     2020-12-26 00:26:58

  IDEs for Java programmers

IDEs are great helpers to programmers. They can help programmers write less error-prone programs with less time. They have become an inevitable part of many programmers. As a Java developer, you may be familiar with Eclipse already. But do you know other IDEs for Java programmers? We will give an overview of different IDEs for Java programmers. These IDEs are Eclipse, Intellij IDEA, NetBean and BlueJ. Eclipse Eclipse is the most widely used IDE for Java programmers. It's an open source IDE whic...

   Java IDE,BlueJ,NetBeans,Eclipse     2014-08-21 06:15:54

  How to handle ES6 modules in NodeJS

In modern JavaScript, there are two types of modules: ES6 module and CommonJS module used by NodeJS. These two types of module are not compatible. Many people would wonder how to load ES6 modules in their NodeJS project. This post will show how this can be done. Difference The syntax of the module being loaded is different. CommonJS modules are loaded with require() and exported with module.exports. ES6 modules are loaded and exported using import and export respectively. Merchanismwise require(...

   NODEJS,COMMONJS,ES6     2020-08-28 22:01:33

  Using htpasswd to protect your website in Nginx

We need to build a password protected website frequently such as an internal website within the team, demo website. Here what we are talking about is password protection in Nginx server level instead of application level registration and login. We are going to use Nginx server configuration and htpasswd file to achieve password authentication. The final result looks like below(Different browsers may have different interfaces): If the authentication fails, it will report a HTTP error: 401 Author...

   Nginx,Password protected,htpasswd     2013-06-07 21:35:27

  Undoing Changes in Git: Working Directory, Staging Area, and Committed Changes

When working with Git, it's crucial to understand how to undo changes at different stages—whether in the working directory, the staging area, or after committing changes to the local repository. This guide walks you through the essential Git commands to effectively manage and revert changes, ensuring that your version control process is smooth and error-free. Modifying Files in the Working Directory but Not Yet Added to the Staging Area When you make changes to files in your working direct...

   GIT RESET,STAGING AREA,UNDO CHANGE     2024-08-11 08:53:34

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