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  Want to make your Eclipse run faster? Try this

Lots of us may find that our Eclipse takes a long time to launch, remember how many times you want to close this heavy machine and shout "F**K". Do you know why Eclipse launches slowly? Is it because we have too many plugins installed or we have created too many projects? No, it's not. Sometimes, it's because we don't have the correct configuration. So where to start? Go to eclipse.ini. First, you may want to add below line in your eclipse.ini configuration file: -Xloggc:gc.log This is to show w...

   Eclipse,optimization,speed     2014-06-10 05:31:11

  Binary tree iterator algorithm

Binary tree pre-order,in-order and post-order traversal are basics in algorithm and data structure.And the recursive binary tree traversal is a classical application of recursion. We define a binary tree node as : // C++ struct Node { int value; Node *left; Node *right; } In order binary tree traversal can be: // C++ void inorder_traverse(Node *node) { if (NULL != node->left) { inorder_traverse(node->left); } do_something(node); if (NULL != node->righ...

   Binary tree,Iterator,Traversal     2013-07-14 21:51:09

  7 revolutionary electronic products

Electronic products can be seen everywhere in our lives. There are several revolutionary electronic products which affect people's life deeply. The following are seven representative electronic products.1. Motorola DynaTACIt is the ancestor of cellphone. DynaTAC is a series of cellular telephones manufactured by Motorola, Inc. from 1983 to 1994. The first model, the 8000x, received FCC certification in 1983,and became the first cell phone to be offered commercially. It weighs 2.5 pounds and can ...

   Electronic products,iPod,ATARI,DynaTAC     2012-07-31 14:27:33

  A possible way to recover deleted files on Linux

Last week I was generating a MD5 sum for an virtual machine image on one OpenNebula server: # ls -l test.img -rw-r--r-- 1 root root 10486808576 Oct 12 02:21 test.img # md5sum test.img At the same time I was clearing the files on the server on another terminal and deleted the above image file mistakenly with : # rm test.img Since this image file is 10GB, it took some time to remove this file from the server, so I used the Ctrl+Z command to suspend the remove command. [1]+ Stopped ...

   Linux,File,Recovery     2013-11-26 07:03:37

  Should a startup focus on good user experience or ship something out quickly?

For a startup, there are always arguments about whether to build a good experience or instead ship something workable out quickly. These two seem contradict with each other and it is usually hard to decide for many startup founders. But in order to win over competitors and gain large portion of market shares as soon as possible, founders must think fast and make their life change decisions. So how should we decide whether we should focus on good user experience or we should ship out the product...

   User experience,Startup     2014-01-20 06:48:28

  Error handling in GoLang

Error handling is one of the must talked topics for any programming language. The program would be more reliable and stable if errors are handled properly and timely. Each programming language has its own way to handle error, this applies to GoLang as well. This post will discuss more about GoLang's error handling mechanism. Error handling Before talking more about GoLang's error handling, we can see how different programming languages are handling errors. C's error check The most direct way of ...

   GOLANG,ERROR HANDLING,FLUENT INTERFACE     2021-03-06 21:36:08

  Java Concurrency Basics: CountDownLatch and CyclicBarrier

CountDownLatch CountDownLatch can be used in synchronizing behavior among threads, it makes one or more threads wait for some actions in other threads to be completed. It has a property count which defines how many countDown() need to be called before other threads which called await() to be waked up.  When a thread calls CountDownLatch.await(), the thread will be blocked until the value of count becomes 0. The initial value of count can be specified when creating the CountDownLatch instanc...

   JAVA,JAVA CONCURRENCY,COUNTDOWNLATCH,CYCLICBARRIER     2018-03-25 07:02:40

  How IoT is Challenging The World of "Smart" Cars

Smart cars have long been the subject of optimism in the auto industry, with their suites of advanced driver assistance and road safety features. Handy as they are, however, their convenient systems come with a substantially higher price tag. For now, however, many car owners are opting into a cheaper, more modular way to enhance their driving experience: a network of IoT devices. This makes it so that even pre-loved cars can enjoy the same features as smart cars. While IoT remains small at the...

   HARDWARE,IOT,CAR     2020-03-09 07:42:26

  Hidden messages in logos

A logo is the simplest thing a user can remember about a product or a company. A good logo design will leave deep impression to customers. Each logo tries to convey either their product information or company vision to customers, this information may be easily understood with a glance or it contains some hidden messages which need us to figure out. Today we share some logos which contain some hidden messages. 1. Fedex The arrow between E and X means Fedex will deliver the product to the right p...

   Logo,Meaning     2013-10-01 07:52:05

  Ways to check existence of JavaScript object

The design of JavaScript is not so sophisticated. It's very easy for us to make mistakes if we are not very careful when using JavaScript. For example, to check the existence of JavaScript object. Now we want to check whether a global object myObj exists or not, if it doesn't exist, we declare it. The pseudo code for this is : if(myObj not exist){ declare myObj; } You may think it's very easy to write the code. In fact, it is much more difficult than we may think. Juriy Zaytsev says there are m...

   JAVASCRIPT,OBJECT,EXISTENCE     2020-09-12 02:14:02

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