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  Go channel explained

In Go, a channel is a type of concurrent data structure that allows two or more goroutines (Go's term for lightweight threads) to communicate with each other. Channels provide a way for goroutines to send and receive values, and they are an essential part of Go's concurrency model. Here's a simple example that demonstrates how to use channels in Go: package main import ( "fmt" ) func main() { // Create a new channel with the `make` function ch := make(chan int) // Start a new ...

   GOLANG,CHANNEL     2022-12-10 22:24:26

  A simple tutorial on GoLang connecting to Clickhouse

Go, also known as Golang, is a statically-typed, concurrent programming language created by Google. ClickHouse is a high-performance, column-oriented database management system that can be used for real-time data analysis. This tutorial will provide a deep dive into how to connect to ClickHouse from a Go program, including how to perform common database operations such as SELECT and INSERT statements. Before proceeding, it is assumed that you already have Go and ClickHouse installed on your mach...

   GOLANG,CLICKHOUSE,TUTORIAL     2023-02-11 07:05:36

  jQuery 2.0 gives up IE 6/7/8

jQuery 2.0 is released after 10 months development. jQuery 2.0 is customized for modern web browsers and also considers about mobile devices. But one big change is that jQuery 2.0 will not be  compatible with old versions of IE and its size is 10% less than the version 1.9.1. The execution efficiency is higher as well. jQuery 1.9.x will still be maintained by jQuery team, they will also provide update for it. Those websites which want to be compatible with all browsers should not upgrade to...

   jQuery 2.0,IE support     2013-04-20 07:58:16

  Google launches Google Keep

According to Tencent Tech, Google announced the launch of Google Keep on Wednesday This is a note application similar to Evernote, its philosophy is to help you save everything you want to remember, including text and images and other notes, they can be instantly synchronized among different devices so that users can get the information they want at any time. This is a free service, it provides support for Web and Android 4.0 or later devices, users can navigate to Drive.Google.com/Keep or downl...

   Google Keep,Evernote,Synchronization     2013-03-21 13:00:02

  $40 million per year to keep Wikipedia running

Wikipedia is an incredibly frugal and efficient nonprofit organization. It serves half a billion visits per month. But do you know how much it costs to keep this huge website running? According to 2012-13 Wikimedia Foundation Annual Plan, the expected spending is around $40 million. Some may argue that Wikipedia is just a site with "just text", why does it cost so much? Oliver Emberton shared his view. To keep Wikipedia running and serve 500 million visits per month. First, you're going to need ...

   Wikipedia,Spending,Cost     2013-09-24 23:05:10

  Can a === 1 && a === 2 && a === 3 be true in JavaScript?

Lots of you may be aware that there is famous interview question which asks whether a == 1 && a == 2 && a == 3 can be true in JavaScript. And the answer to this question is YES. The reason is that == will do a non-strict comparison which will evaluate a to a number and this provides the possibility of dynamically return the value when every time a is accessed. Have you ever wondered whether a === 1 && a === 2 && a === 3 can be true? At first glance, it seems this ...

   JAVASCRIPT,===,STRICT COMPARISON     2018-04-06 12:17:29

  Different ways to print "Hello world" in Java

This post is not about best practice to print "Hello world" in Java, it is about exploring different capabilities offered by Java. Also there are articles about printing "Hello world" in different programming languages, but this post is not about that. Standard literal The most commonly used way is to use System.out to print"Hello world". System.out.println("Hello world"); Enumeration An enumeration can define a set of values belonging to one category. For example, an enumeration for all months ...

   JAVA,FEATURE     2016-05-21 21:49:48

  A C++ program puzzle

Recently I came across a question asked by wang2191195 on a Chinese IT forum CSDN which asks about a C++ program puzzle. He has a code snippet which cannot be compiled. The code is:#include <cstdlib> #include <iostream> using namespace std; class Base{ public: virtual void func(){ cout << "Base::func()" << endl; } virtual int func( int num ){ cout << "Base::func( int " << num << " )" << endl; return 0; ...

   C++,Puzzle,Hide,Overload     2012-05-13 02:31:26

  4 Things Every Great Online Teacher Knows

Virtual classrooms have become the new norm for education during the pandemic. Teachers from every school have to adjust to this new reality to ensure students keep learning even in the absence of a physical classroom setup.  Thankfully, there are various digital solutions to help teachers conduct online classes without much hassle. One such tool that has revolutionized the online learning market is a Learning Management System (LMS). For schools, the in-house learning management department...

   EDUCATION,ELEARNING,ILEARNING     2021-02-12 03:23:43

  Want to install 64 bit OS on VirtualBox?

By default, VirtualBox only allows to install 32 bit OS on it. But sometimes, 64 bit OS is wanted for specific uses such as running platform specific tests. To allow installing 64 bit OS on VirtualBox. Below information is needed. Here is the official documentation about 64 bit OS: VirtualBox supports 64-bit guest operating systems, even on 32-bit host operating systems, provided that the following conditions are met: You need a 64-bit processor with hardware virtualization support (see the ...

   VirtualBox,64 bit,hardware virtualization,Ubuntu     2014-11-08 03:52:07

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