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  A tutorial on Github Actions

Github Actions is a CI/CD service created by Github. It aims to make it easy to automate all software workflows, now with world-class CI/CD. Build, test, and deploy code right from GitHub. It was launched in October 2018 and was officially available to all users in November 2019. This post will give an introduction of Github Actions and explain how it works. What is Github Actions Normally Continuous Integration includes some steps, fetching code, running test, sshing into remote server in...

   GITHUB,GITHUB ACTIONS,CI,CD     2019-12-23 05:33:39

  Inspiring facts about JavaScript

JavaScript has been advocated as the first language to be learned by people who want to program. We have discussed the reasons why we should do so. Recently with the popularity of Node.js, JavaScript has become a full-stack language,  it can be used as both frontend and backend programming language. Today we will give some hard facts which will convince you about the popularity of JavaScript. Just like William Ting said ""JavaScript will stay relevant as long as people use the internet". Ye...

   JavaScript,popularity     2014-06-07 08:52:36

  The world's first HTML5 SIP client

This is the world's first open source HTML5 SIP client (May 12, 2012) entirely written in javascript for integration in social networks (FaceBook, Twitter, Google+), online games, e-commerce sites... No extension, plugin or gateway is needed. The media stack rely on WebRTC. The client can be used to connect to any SIP or IMS network from your preferred browser to make and receive audio/video calls and instant messages. The protocol parsers (SIP, SDP...) are highly optimized using Ragel loo...

   HTML5,SIP,CLient,Google     2012-05-21 06:18:34

  A mini guide to HTTP referer

In HTTP header, there is a field named Referer which is to provide the referrer of the current accessed page. In this post, we will introduce the usage of HTTP referer field. On the web, when a user visits a webpage, s/he must be from some place. This place is usually referred a s referer. This information is very important to some website operators and server owners as they want to know where they get the traffic from and this helps them provide better service for potential targeted users. In t...

   HTML,HTTP REFERER,REFERRERPOLICY     2019-06-29 02:23:25

  Traditional recursion vs Tail recursion

Recursion is a frequently adopted pattern for solving some sort of algorithm problems which need to divide and conquer a big issue and solve the smaller but the same issue first. For example, calculating fibonacci  accumulating sum and calculating factorials. In these kinds of issues, recursion is more straightforward than their loop counterpart. Furthermore, recursion may need less code and looks more concise. For example, let's calculate sum of a set of numbers starting with 0 and st...

   ALGORITHM,RECURSION,TAIL RECURSION,TRADITIONAL RECURSION     2016-09-23 23:54:09

  Demo on creating worker pool in GoLang

A worker pool is a pool where a specified number of workers(usually goroutine) created and run to pick up tasks. This can allow multiple tasks to be ran at the same time while keeping the number of workers a fixed number to avoid overuse of resource in the program. There are usually two approaches of creating worker pool. One is with fixed number of workers pre-created One is creating worker when needed until the max number of workers created In this post, we will cover the demonstration of cr...

   WORKER POOL,GOLANG,GOROUTINE     2021-01-24 05:04:00

  System programming is still there

System programming is the practice of writing system software. System software lives at a low level, interfacing directly with the kernel and core system libraries. Your shell and your text editor, your compiler and your debugger, your core utilities and system daemons are all system software. But so are the network server, the web server, and the database. These components are entirely system software, primarily if not exclusively interfacing with the kernel and the C library. But nowadays more...

   System programming     2014-02-27 05:46:48

  Private LLM Integration with RAGFlow: A Step-by-Step Guide

If you’ve found your way here, you’re probably already excited about the potential of the RAGFlow project and eager to see it in action. I was in the same position, so I delved into the codebase to see how it could work with custom large language models (LLMs). This post will walk you through my findings and show you how to get RAGFlow running with your own LLM. As of now (November 8, 2024), RAGFlow offers limited support for local LLMs, and vLLM&nb...

   AI,LLM,RAGFLOW,RAG     2024-11-12 08:40:29

  Convert HTML to DOM elements using JavaScript

In some cases, one would want to convert a HTML string to the DOM elements so that JavaScript can handle them easily. This is frequently used when one get some data from third party APIs where the data is in HTML format. In JavaScript, there are a couple of ways one can use to convert HTML to DOM elements. DOMParser document.createElement DOMParser DOMParser can parse XML or HTML source stored in a string into a DOM Document. After the conversion, the normal JavaScript call of h...

   JAVASCRIPT,DOMPARSER,DOCUMENT.CREATEELEMENT,HTML,DOM     2017-08-18 22:51:46

  Select top 3 values from each group in a table with SQL

Yesterday, my friend Liu Bing asked me a question about how to select top 3 values for each person in a database table using SQL. I think this question is interesting and it deserves some thoughts. Here I record down how to solve this issue. Assume we have a table which has two columns, one column contains the names of some people and the other column contains some values related to each person. One person can have more than one value. Each value has a numeric type. The question is we want to se...

   SQL,Correlated query,top 3     2013-05-23 03:21:25

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