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Differences among Enter,F5 and Ctrl+F5 in webpage refresh
When we press Enter, F5 or Ctrl+F5 to refresh a webpage, is there any difference among them? Actually it's yes, we can find the difference from the request header and response header information. There are two cases about pressing Enter in the address bar. First if the page requested is cached and not expired in the browser, we can find the header information sent by the browser is : Host 192.168.3.174:8080 User-Agent Mozilla/5.0 (Windows NT 5.1; rv:5.0) Gecko/20100101 Firefox/5.0 Accept ...
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
Build a Kubectl Plugin from Scratch
by author The command-line tool kubectl is indispensable when using Kubernetes. You need it to query related Pod and Service information both in developing or performing some maintenance operations, such as events, scale, rolling update, etc. However, when using kubectl, there are many inconveniences. Though Kubernetes is officially maintaining kubectl¹, and you can submit the problems, improvement, and even PR in its Github Issues, you still have to wait long before its release. The m...
Set up Superset on ubuntu 16.04 LTS
Apache Superset (incubating) is a modern, enterprise-ready business intelligence web application. Compared with business-focused BI tool like Tableau, superset is more technology-navy. It supports more types of visualization and able to work in distributed manner to boost the query performance. Most importantly, it is free of charge! An example dashboard: Let’s go and set it up. Create a virtualenv Assume Anaconda is installed for python management. # create a virtualenv with python 3.6 co...
The First Bite on etcd Code
Etcd, one of the crucial components of Kubernetes. If APIServer is the heart, then etcd is the blood vessel that sends the end state of Kubernetes resources to various “organs”, providing high-speed, stable storage, and supporting APIServer’s high load performance. What if the etcd is not working properly? Just the condition as someone has a vascular disease. The deeper you know about them, the better diagnose you can make when issues occur. from unspl...
SOURCE CODE,ETCD 2022-02-12 01:03:14
Go 1.16 is released
Note: The post is authorized by original author to republish on our site. Original author is Stefanie Lai who is currently a Spotify engineer and lives in Stockholm, original post is published here. Last week, Go1.16 was released, bringing relatively more changes than version 1.15, which was influenced by the epidemic. The update is in many aspects, including compilation, deployment, standard library, etc. In the official Go document, all changes are classified based on Too...
GOLANG,GO1.16,NEW FEATURES 2021-02-26 21:08:42
Google's acquisition of Quickoffice threatens Microsoft
Windows has over 90% market share in desktop operating systems, even though now other OS such as Mac OS and Linux are saying they are more user friendly, more stable and safer than Windows, Windows still has a weapon MS Office which can defeat all of them. However, with the development of mobile network and cloud computing, Windows is now challenged by different competitors on mobile and cloud areas. Mobile and cloud are weak sides of Microsoft , but they are strength of Google.Google sudd...
Google,QuickOffice,Microsoft,MS Office 2012-06-07 11:40:10
SkipList in Go
Algorithmic thinking is the must-have in the coding world, so I have been keeping the routine of algorithm practice every week, consolidating my knowledge of data structures on one hand, and improving my coding skills as well. A difficult one happened to be stuck in my mind- Implement SkipList with Go, which took me quite a weekend. Below is the front-line report of how I finally got the hang of it. First, from its concept. Wiki has explained it well. a skip list is a probab...
Windows 8 Possible Features: Ribbon, Metro, Apps, Cloud Integration
Microsoft may still be plugging away at selling Windows 7 to consumers and the enterprise, but rumors have already started about the next version of the popular operating system—dubbed "Windows 8" by many in the media. Rafael Rivera and Paul Thurrott, two bloggers with a track record of delving into Microsoft's proprietary code base, recently sparked a fresh round of chatter with a dissection of a supposed Windows 8 early build, adding their voices to a discussion that extends back to 201...
Windows 8,New features,Touch,Metro 2011-04-11 02:10:12
Android Tutorial: Creating and Using an SD Card in the Emulator
In a previous post, I mentioned how user-friendly Android is for developers. There’s extensive documentation and information on the architecture, the different components and best practices. However, the documentation has a few blind spots. Many of the tools have little documentation and no usage examples. The information is there, it’s just hidden behind a few layers of Android theory.So I’m going to try and document a few of the basic things that you’ll probabl...
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