SEARCH KEYWORD -- Bit operation


  Twitter service down incidents summary

This Thursday, Twitter encountered a global service down incident. This is the second service down incident since last month. Later Twitter updated its website and stated that users might not be able to access Twitter temporarily.Twitter admitted the service down incident and explained that this time's service down was caused by problems of their both data centers.Ok, now lets summarize the service down incidents encountered by Twitter in past few years.in May 2008, Twitter's new engineer team w...

   Twitter,Service down,History     2012-07-28 12:36:39

  Data type in MySQL

For both small free database space and large e-commerce websites, reasonable database table structure design is essential. To achieve this, it requires us to have a full understanding of commonly used data types in database system. Below we share some knowledge about data types in MySQL.1. Numeric typesThe numeric types can be classified as : integer, float and decimal type.The so-called "decimal" refers DECIMAL and NUMERIC, they are of the same type. Strictly speaking it is not a numeric type, ...

   MySQL, Data type,VARCHAR     2013-01-01 10:56:06

  Can two new objects point to the same memory address in GoLang?

Do you have any idea what the output will be for below GoLang snippet? package main import ( "fmt" ) type obj struct{} func main() { a := &obj{} fmt.Printf("%p\n", a) c := &obj{} fmt.Printf("%p\n", c) fmt.Println(a == c) } Many people would think that a and c are two different object instances which have different memory addresses. Hence a == c will be false. But if you try to run the above program, you would see below output 0x5781c8 0x5781c8 true To get to know the reason wh...

   GO,GOLANG,VARIABLE ESCAPE,ZEROBASE     2019-04-06 01:19:52

  Surface Pro available in mainland China on April 2

According to 36Kr, the Surface Pro will available in mainland China, Australia, France, Germany, Hong Kong , New Zealand and the United Kingdom starting from the end of March. Now the confirmed news is Surface Pro will be on sale in mainland China at 9:00pm on April 2 officially. The Surface Pro price in the United States is 64GB/$899, 128GB/$999. If it's the same in China, then the cheapest Surface Pro should be nearly ¥5600,the 128 GB Surface Pro will be up to ¥6200.Surface Pro configu...

   Surface Pro,China,Sale     2013-03-28 08:51:00

  Is Facebook becoming Tencent like?

Recently there is news that Facebook is developing a Reader application which is to compete with Flipboard and Pulse. This reminds me a few movements of Facebook in the past few months. First they built a copy of Snapchat named Poke which failed badly at last. Then they launched a new feature on Instagram named Video on Instagram which allows users to shoot and share short videos up to 15 seconds. This feature is to compete with Vine from Twitter. It seems Instagram wins over Vine on this. You c...

   Facebook,Tencent,Copy     2013-06-24 01:17:27

  Convert time to Unix time

Unix time is defined as the number of seconds that have elapsed since midnight Coordinated Universal Time (UTC), 1 January 1970,not counting leap seconds. It is used widely in Unix-like and many other operating systems and file formats. It is neither a linear representation of time nor a true representation of UTC. Unix time may be checked on some Unix systems by typing date +%s on the command line. Sometimes it's a bit difficult to compare times stored in different applications or systems with ...

   UNIX time, Oracle DATE, conversion, timestamp     2013-01-19 09:04:17

  Does CEO of a tech company need to know programming?

For tech startups, there are usually only a few people at their early stage. To complete all the coding work in a short period time, it often requires that every one of the team including the CEO knows something about programming so that they can help complete the tense work as soon as possible. But does the CEO of other tech companies also need to know programming? As the CEO of a company, it's not necessary that they have to know about programming. The main job of CEO is to coordinate all the ...

   CEO,Programming,Benefit     2013-07-01 05:39:26

  What is goroutine?

Casual Talk Golang is quite enjoyable to write, aside from the tedious if err != nil checks. One of the fundamental reasons for the joy is goroutine, a core feature of Golang. Understanding goroutines in detail is worthwhile, as they contribute significantly to the pleasure of working with Golang. So, let's talk about goroutines, hoping to provide some insights to the readers. TL;DR: We'll start by talking about assembling a computer, then delve into some concepts of the operating system, such ...

   EXPLANATION,GOLANG,GOROUTINE     2024-01-21 03:26:10

  Check out Google Reader substitutes

It's only a few hours left that Google Reader will be shut down Since Google decides to decommission such a good product, many people are disappointed about Google. The gene of Google is completely different from Facebook, The strategy of promoting Google+ everywhere is becoming a bit offensive. As a heavy user of Google Reader, people have to start looking for an alternative, Below we give a comparison of different Google Reader substitutes. And we compare them with following parameters: Lload...

   RSS reader,Google Reader,Feedly     2013-06-30 08:46:42

  Huawei is open to acquire Nokia

Last night Huawei unveiled a new flagship smartphone Ascend P6 in London. It may be the thinnest smartphone in the world and its potential competitor is Samsung Galaxy S4. Before the press event, an article from FT said that Huawei was open to buy Nokia. "We are considering these sorts of acquisitions,maybe the combination has some synerges but depends on the willingness of Nokia. We are open-minded." remarked by Huawei's Richard Yu. After this news, Nokia's share price surges 11% to $4.10 per ...

   Huawei,Nokia     2013-06-19 00:43:38

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