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  Amazon is a good company but doesn't have the best business model

Public opinion about a company is usually based on its performance. If it performs well, people will praise it, otherwise people will blame it. In 1999, Apple was still a broken apple(Steve Jobs's talent and effort was paid off yet). Public opinion about Apple was the closed model caused Apple's failure. They built hardware themselves, developed software themselves and delivered service themselves, this is certainly not sustainable. But Steve Jobs let everyone see this new model. In order to con...

   Business model,Amazon,Apple, Microsoft     2013-07-02 11:34:45

  Arrays.equals() vs MessageDigest.isEqual()

Both Arrays.equals() and MessageDigest.isEqual() are used to compare the equality of two arrays. They can be interchangeably in many cases. However, they do have some differences which lead to different use cases in real applications. One difference is that the arrays passed to MessageDigest.isEqual() cannot be null while it's ok for Arrays.equals(). The one major difference between these two methods is that Arrays.equals() is not time-constant while MessageDigest.isEqual() is time-constant. Thi...

   Arrays.equal(),MessageDigest.isEqual(),Java,Security     2015-05-14 22:03:29

  PaaS vs. SaaS: The Differences And How To Pick The Right Option

Platform as a service (PaaS) and software as a service (SaaS) are two kinds of cloud computing products that enable businesses and their clients to deliver and use various services, respectively. Before diving into the differences between the two concepts, it’s important to take a step back and understand what a cloud service really is. Cloud computing primarily refers to large storage of data, programs, and operations that are accessible via the Internet and are not stored on a user&rsquo...

   CLOUD,PAAS,SAAS     2020-04-06 06:30:32

  Why does LinkedIn migrate to NodeJS from Ruby?

Node.js, the server-side JavaScript-based software platform used to build scalable network applications, has been all the rage among many developers for the past couple of years. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices. Because of these advantages, there are many websites are migrating to Node.js.One of them is LinkedIn. LinkedIn was initially built on Ruby...

   LinkedIn,NodeJS,Ruby     2014-03-21 23:39:25

  Pay Your Programmers $200/hour

If you are hiring programmers, you should pay them $200/hr. This breaks through otherwise impenetrable psychological barriers, helps solve the agency problem, and ensures you are only hiring programmers when you really need them. Expectations $200/hr is an open declaration of your expectations. It states that you are expecting to hire both a professional and an expert in the field. As a programmer, I treat contracts that pay me $200/hr differently from jobs/contracts that pay me $65/hr eq...

   Salary,Programmer,Responsibility,Urgency,Value     2011-12-31 15:34:57

  4 Technologies That Impact You (Without Your Knowledge)

Our world to day is so driven by technology that it’s easy to stay on top of the major changes and developments. We know when there’s a major new innovation in personal electronics; we know that the 5G network is rolling out this year; we track the progress of smart cars, learning thermostats, and interactive home speakers. We even tend to care about how major tech companies around the world are performing! However, as “plugged in” as we all seem to be to the world of tec...

   AI,DATA ANALYTICS,IOT     2020-04-16 06:35:54

  That’s Not TDD

A few months ago I was visiting a client who was having a lot of problems using TDD. “It takes over half an hour to run our unit tests,” he said. “You are not doing TDD,” I said. “In order for tests to be valuable all of them must run fast—within a few seconds, or developers will stop running tests frequently.” “But how to I make them run fast?” he asked, “Just connecting to the database takes 30 seconds” So I showed him a techn...

   TDD,Driver,QA,Model,Uncontrol,Method     2011-08-25 02:26:29

  Including Related Objects in Queries

Every time you hit a mobile network, it slows your users down and introduces another point of failure. So when you're designing your application, you need to take advantage of every opportunity to omit needless requests. Parse's philosophy is to help make this easier by providing standard ways to reduce network requests. One example is caching queries, which lets you avoid resending requests you've already sent. Another example, which we've launched in the most recent version of the...

   Software design,Request,Network load,Resource manage,Mobile     2011-12-07 08:51:56

  Difference between Beijing and Silicon Valley on innovation

The fundamental difference between Beijing and Silicon Valley is not the sky color, but the fact that on one side the young people are talking about buying a new house, a new car and getting married, while on the other side young people are talking about how to change the world. Now and then we can read from the newspaper or the Internet that a Silicon Valley company is valued over 1 billion US dollars. Also we can see many famous US IT brands on the Internet such as Google, Facebook,Twitter, Am...

   China,Silicon Valley,Innovation, Comparison     2013-06-24 03:09:54

  HeartBleed: Inside the heart, what happens to a normal WEB user?

To be brief, our email, IM, facebook etc. are at the risk, so try to minimize the access in these few days. Especially we should try to avoid log into our internet-banking, because we may expose our user id and password. Also later when the service providers fix the bug, we would better to change a new password for all the web accounts that are important to us. Here comes the technical explanation. You might notice before that a lot of websites use URL starting with "https". For example, https:/...

   HeartBleed,Analysis     2014-04-09 22:41:43

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