SEARCH KEYWORD -- Problem solving


  Singleton Design Pattern in Java

Singleton is frequently used in applications where resource may be expensive to create and no instance specific state needs to be maintained. For example, when creating database connection, a singleton may be needed. Today we will share the famous Singleton design pattern in Java. 1. Definition Singleton design pattern is a design pattern that restricts the instantiation of a class to one object. It is one of the most well-known design patterns. 2. Application Singleton ...

   DESIGN PATTERN,SINGLETON,MULTITHREAD,JAVA     2020-04-11 02:16:28

  How to optimize MySQL insert statement

For a big data system, one problem is the data access efficiency, one more problem is that the data insertion is very slow. We had a service system, the data loading process would take 4-5 hours. This time consuming operation is risky since if the program is interrupted during the loading process, it might be rerun, this will be troublesome. So it's necessary to improve the insertion efficiency for big data systems. Here we provide two optimization suggestions. 1. Combine multiple insert stateme...

   MySQL,insert,optimization     2012-10-24 22:03:13

  Fast tracking android app development with optimum delivery.

Most Android developers nowadays are faced with challenges of delivering optimum feature/product in due time. Most developers believe working hard will ensure their success in getting this actionable result, howbeit, working smart is the ground to get this done.   working smart brings productivity while working too hard might resolve to frustration. In this article, we will be looking at some basic tips to working smart as an android developer in order to: Fasten up your nex...

       2017-09-11 17:41:40

  Unix Philosophy

First, let me tell two stories.The first one is one Japan soap factory had a problem that they sometimes shipped empty boxes to the customer without soap inside. So they spend much time and money to invent a X-ray machine to check whether the soap box is empty.The same thing happens in a small factory which doesn't have too much money. The solution of them to solve this problem is they use a desk fan to blow the empty boxes out of the belt and into a bin.The second story is NASA finds that in sp...

   Unix Philosophy,Simple,Rules     2012-05-06 06:49:26

  How can you test if your VPN is working properly?

Installing a VPN on your device is one of the essential steps you need to take in order to have a safe and pleasant online experience. It good functioning is in your best interest and this is why you need to make sure that your VPN is working properly. Unfortunately, a lot of problems can occur if it turns out that your VPN is not up to the task and that it has some leaks.  Can a leak really occur? To answer you most directly – Yes! Yes, it can! Unfortunately, no system is perfect an...

   VPN     2020-09-17 06:53:19

  10 reasons why I "hate" working in Facebook

To me, the past two years in Facebook is simply a nightmare, To celebrate the upcoming 2 year anniversary, I decided to jump out of it. Facebook, I have so many reasons to hate you. However, for fear that readers find me too annoying, I take my complaints to be condensed into the top ten reasons.1. Why should submit so much code? In the past two years, the number of Facebook engineers is doubled, and the amount of code submitted by each engineer is also increased with the increase of the number ...

   Facebook,Hate,Leave     2012-08-17 13:34:05

  Which program is using USB device?

Sometimes when we want to plug out our USB device, but the operating system tells us we cannot plug it out since some other processes are using the USB device. How do we know which process is using our USB device. Here is a simple solution.First, go to Start->All programs->Accessories->System Tools->Resource Monitor. (as in Windows 7, for other Windows systems, you may similar program called Resource Monitor but may not in the same location as in Windows 7).Then, open Resource Monito...

   Windows.ISB device,Plugout problem,Solut     2011-07-22 09:20:13

  Recent Online Scams You Need to Know About

It’s easy to forget that the internet is a dangerous place and that it’s easy to become a victim. Everyone wants to think that they’re too smart to fall for online scams or obvious fraud. Yet actions speak louder than words, and 97% of people still struggle to identify a phishing scam. Awareness is critical in beating the cybercriminals. So here are examples of the latest online scams and tips on how to avoid becoming a victim of similar attacks. What are Online Scams? Online s...

   DATA SECURITY,VPN     2019-12-12 07:18:36

  Do you have this kind of comments in your source code?

Writing runnable code is the essential skill of a programmer, writing understandable comment is also a skill a programmer should acquire. There is some famous saying that bad comment is worth than no comment. Usually your code will be maintained by other people, if you provide them some difficult to understand or misguided comments, this will be nightmare to them. While at some other time, programmers may put some funny comments in their codes which may make others laugh. Today we...

   COMMENT,HUMOR     2016-08-01 10:25:14

  Error handling style in C

Following are three error handling styles in C.Which one you like the most? Or you don't like any one?1. /* Problem : Not enough. Easy to be wrong */int foo(int bar){        int return_value = 0;        int doing_okay = 1;        doing_okay = do_something( bar );        if (doing_okay)        { ...

   C,Error handling style,Goto,Nested if     2012-04-24 06:51:00

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