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  Concurrency vs Parallelism

Concurrency and parallelism are two related concepts which deal with executing tasks "simultaneously". From Sun's Multithreaded Programming Guide: Concurrency: A condition that exists when at least two threads are making progress. A more generalized form of parallelism that can include time-slicing as a form of virtual parallelism. Parallelism: A condition that arises when at least two threads are executing simultaneously. These two definitions are too formal to be understood easily. On t...

   Concurrency,Parallelism,Thread     2013-08-07 23:42:33

  Image lazy loading plugins on Github

Image lazy loading is a concept where images are getting loaded only when needed. It has been adopted in many web applications to reduce usage of bandwidth. When a web page is loaded in a web browser, not all the page elements would be visible in the view port, hence those resources(images, videos etc) don't need to be loaded.  Currently there are quite a few open source plugins on Github which can help achieve image lazy loading. Today we will introduce a few of them. Echo.js Echo.js is a ...

   JAVASCRIPT,OPEN SOURCE,WEB DEVELOPMENT,IMAGE LOADING     2017-04-22 01:16:04

  iPhone 7 may come with following new features

There are all kinds of news that iPhone 7 will be released in the coming September. Now the news seems to be convincing. On 26 August, a Sina Weibo(China's Twitter) user @POPPUR posted an weibo which says that China Telecom, one of the largest telecom vendors in China, has opened the pre-order of iPhone 7. Along with this, a few new features of iPhone 7 are also released. On the photo uploaded, there are a few new features of iPhone 7 displayed. They are : Waterproof No headphone jack Wireless...

   NEW FEATURE,NEWS,IPHONE 7,CHINA TELECOM     2016-08-27 03:50:41

  Samijyon : A tablet from North Korea

According to Sina Tech, North Korea Tech posted an article about Samijyon. Samijyon is a model of Android  tablet manufactured by North Korea. You can buy it with $200 in North Korea. Smajiyon's hardware configuration is as good as Samsung and Apple, but it doesn't allow WiFi connection and ordinary North Koreans cannot connect to Internet as well, users can only connect to domestic network of North Korea. On this tablet, there are no built-in Google apps such as Gmail and Google Play. But...

   Samijyon,North Korea,Tablet     2013-08-03 22:01:35

  The details and analysis of capturing gRPC packets

Introduction If you're only using gRPC at the application layer, I believe studying the examples on the gRPC official website is sufficient. However, when planning to extensively use gRPC within a team, you will face many challenges, such as authentication schemes between services, routing solutions for multi-region services, and compatibility solutions with existing RESTful services. I recently realized that applying a technology stack requires mastering a wealth of information about that stack...

   GRPC,GOOGLE     2024-01-14 05:59:13

  Facebook share price is over $38 before the market opens on Wednesday

According to Sina Tech, Facebook share price is over $38 before the market opens on Wednesday. It's the first time that its share price is over $38 since its IPO last year. In May 2012, Facebook went to public on Nasdaq with a releasing share price of $38. The share price went below $38 after the first trading day. Then after its share price kept dropping until last September it reached to its lowest point with a share price of $17.58. But as Facebook's performance was better than expected last...

   Facebook ,Share price     2013-07-31 07:45:18

  20 cool jQuery countdown scripts and plugins

Have you ever seen the count down component of Apple before its app downloads reached 50 billion times? It's really cool. On a website, we often need to have a count down function, for example, when a e-commerce site initiates some promotions or some organizations want to start an event. In this post, we introduce some cool jQuery countdown scripts and plugins. Circular Countdown jQuery Plugin MORE INFO / DEMO Coconut – Jquery Countdown Plugin - MORE INFO / DEMO ...

   jQuery,countdown,plugin     2013-09-01 22:07:57

  Twitter is the winner of US election

Yesterday, the final result of the U.S. election was that Obama defeated Romney and he was re-election as President of the United States of America, Later he made a victory speech. While in the Internet world, the real winner is not Obama, but Twitter. Why? Because there was no downtime for Twitter yesterday.On election day, There were a total of 31 million election-related Tweets posted, In peak period, there were 327,452 tweets posted per minute,  the peak record was 874,560, about 15,107...

   Twitter, US election,Fail whale     2012-11-08 10:55:38

  Are you ready for Facebook's phone?

According  to Sina Tech, Facebook will announce its own phone today in US. They will also release its new Android application. The Facebook phone is manufactured by HTC, the model will be HTC First. This will be a deeply customized Facebook phone, some IT professionals think this phone's name is very similar to HTC's flag model HTC One. This phone may provide a home screen application named Facebook Home. Facebook Home adopts the minimization design, it can display photos in full screen. T...

   Facebook phone,HTC,Facebook Home     2013-04-04 07:01:12

  Convert JKS to BKS using keytool

There are lots of questions(question 1, question 2) on Stackoverflow about how to convert JKS keystore to BKS keystore(a keystore format provided by BouncyCastle) using Java keytool.  The reason why this conversion gets lots of questions is that BKS is not a keystore format supported by Java SE, it's a third party keystore format. To convert JSK to BKS, the BKS provider has to be downloaded first. And a few more options needs to be added when running the keytool command. The typical co...

   JKS,BKS,KEYTOOL,JAVA,SECURITY     2016-07-14 03:49:52