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  Undefined property or variable in JavaScript

JavaScript is a weak type language, and also you can use a variable or property where it's undefined. If we don't have correct ways to check whether a property or variable is defined, we may get unexpected results when we try to access the,. How can we check whether a property or variable is undefined? This is actually a somewhat tricky question. Let's start off with some facts about undefined and then see what kind of function is consistent with the ones we care about. JavaScript attaches type...

   Property,Undefined,Array,JavaScript     2014-07-24 06:56:07

  Baidu may withdraw from NASDAQ

Baidu, the search engine giant in China, may withdraw from NASDAQ some day and then get re-listed on A-shares market in China. This message is conveyed by Robin Li, CEO of Baidu, on a Wednesday(Beijing time) interview. Baidu is now investing heavily on O2O(Online to Offline) service as it is an emerging market where all Internet giants in China are diving in. In addition to its own O2O products, which include delivery service Waimai and deals site Nuomi, it has invested in a number of othe...

   NASDAQ,ROBIN LI,O2O,BAIDU     2015-09-17 04:03:55

  Google will close shopping search service in China

Google vice president of products Sameer Samat posted a news on Google Blackboard, since the service failed to meet the expectations, in order to better optimize resources, Google decided to close the shopping search service in China.In order to better optimize resources, we have decided to close the shopping search service in China. The original intention of the development of this product is to set up a bridge between consumers and retailers and traders. However it did not meet our expectatio...

   Shopping search service, Google China     2012-12-12 14:30:44

  How to increase the productivity of your IT team

  As a manager, when your team isn’t completing as much work as they should be and you’re feeling the pressure from those higher up, it can be difficult to know what to do. The whole team is stressed and productivity is taking a huge drop. When this happens it’s time to take a step back and assess where the issue lies. Here’s how to increase the productivity of your IT team.   Have clear goals and roles At the start of every project have a meeting with everyone...

   PRODUCTIVITY,IT TEAM, BUSISNESS     2018-04-17 06:19:26

  How expensive is a MySQL query?

Database access speed is always the bottle neck of many applications. Many application have large amount of data to search, retrieve and display nowadays. How do we improve the performance of our applications, how do we reduce the cost of database access? Apart from the design of database, the quality of the query is also one important factor to take care.  But before that, we need to know how much network traffic a query will consume. Yunyang,Zhang from Nubee in Singapore did some research...

   MySQL,Network traffic,Query     2013-04-09 05:13:33

  Data from iPhone 5 event

Apple finally unveils iPhone 5 on an event at the Moscone Center in San Francisco. At the beginning of the event, Apple showed us some data. There will be 380 Apple Retail Stores opened across 13 countries Last year Apple Retail Store welcomed 83 million customers 7 million Mountain Lion upgrades since last month It ranked the first place in sales for Macbook Air in United States, it has 27% market share in July From April to July, 17 million iPads are sold 84 million iPads are sold until thi...

   Apple,iPhone 5,event,data     2012-09-12 21:26:03

  Apple has trouble in Russia now for homosexual promotion

According to The Independent report, Apple is now facing an investigation and a potential fine of up to one million rubles from Russia government. This investigation is about the built in same-sex emotion icons in iOS keyboard. Russia claims that these emotions violated the "Russian LGBT propaganda law" approved in 2013. This law is mainly approved to protect children from exposing to content that promotes homosexuality as being a norm in society—contradicting "traditional" fami...

   SAME-SEX,APPLE,RUSSIA,HOMOSEXUAL     2015-09-27 23:21:44

  Reasons to use blue in design

Blue color is used in many product designs and logo designs such as Facebook, Microsoft, Twitter and our site. Why do companies choose blue color in their design? It's not a coincidence for them to choose blue. One saying is the color blue is associated with trust, efficiency, clarity and simplicity. Beside this reason, are there other reasons? From an interface design standpoint, blue is an incredibly useful color. Among the dark colors designers have in their toolbox, red, orange and green al...

   Design,Blue     2013-12-13 07:13:22

  Crazy! 618 million daily active users on Facebook

Facebook released 2012 Q4 financial report. Facebook total revenue in the fourth quarter of 2012 is $1.585 billion, an increase of 40% over the same period last year, about 23% of the total revenue are from mobile advertising. Net profit is $64 million, down 79% over the same period last year.Now Facebook monthly active users reach 10.6 million, daily active users reach 618 million. The daily active users from mobile are more than the daily active users from desktop side the first time.In the e...

   Facebook,Financial report,Mobile     2013-01-31 03:13:06

  Learning Python as your first programming language

Python is a widely used general-purpose, high-level programming language Its design philosophy emphasizes code readability, and its syntax allows programmers to express concepts in fewer lines of code than would be possible in languages such as C. Python now becomes more and more popular and is now being used the first teaching language in some universities. Why would you like to learn Python as your first programming language? Below are the reasons. Python is a high-level language with dynami...

   Python,Advantage     2014-04-07 05:36:04

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