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  Code coverage rate

When doing unit testing, the code coverage rate is often used as the criteria for measuring testing performance, even in some cases code coverage may be used to consider whether the testing task is completed or not. So testers need to spend much time on designing test cases which can cover as many codes as possible. There are advantages and disadvantages about using code coverage rate. First let's check what is code coverage rate: code coverage rate= the degree of code coverage in testing. There...

   Unit testing,Code coverage     2013-04-16 12:50:57

  Time to think about supporting max/min functions for integers in GoLang

Sometime back we wrote a post explaining why there is no max/min function support for integers in GoLang, one of the reasons is that no overloading is supported and the function name has been used for other numeric types float64. To solve this problem and make max/min function support integer as well, either GoLang should support overloading like in Java or the same set of functions need to be created in a different package other than standard math. These don't look like good options as overload...

   MIN,MAX,GENERICS,GOLANG     2021-07-24 03:14:42

  Memory related exception analysis in Java

Java Virtual Machine Specification divides the memory of JVM into several areas : Heap, Stack, The Program Counter register and Method area etc. In HotSpot JVM, heap is composed of Young, Tenured and Perm. There are different OutOfMemory error can happen in different memory area. Next is an overview of some of these OOM errors. StackOverflowError The JVM will allow only a specified number of stacks created nested. An JVM option -Xss can be set to determine the maximum stack size. If the num...

   Java, Memory model, Memory exception, OOM     2015-01-19 06:54:27

  What should video website do besides buying copyright?

Several major video sites in China seem to be designed by the same team, they look the same from the main interface to advertising scheme. The question is whether video sites really do not need to improve their products and user experience in addition to smashing the money to buy the copyright to attract users, is there no other choice? After reading this article, perhaps we can somehow have different views.The Web 2.0 era's video siteIn Web 1.0 era, the main way for users to obtain information...

   Video site, Copyright,User experience     2013-03-06 03:15:39

  MaxHeapSize in JVM

MaxHeapSize is an option which is to set the JVM maximum heap size can be allocated. We can specify the MaxHeapSize as VM argument when we run the program by setting -XX:MaxHeapSize=, here can be 2M, 20M, 200M etc. We can also view the current MaxHeapSize set by setting different JVM options. To view the MaxHeapSize, we can use two JVM options : -XX:+PrintFlagsFinal and -XX:+PrintCommandLineFlags. Below is one example when running -XX:+PrintFlagsFinal: bool MaxFDLimit ...

   JVM,MaxHeapSize,Alignment     2014-06-17 07:01:50

  Send Email Using Gmail in ASP.NET

If you want to send email using your Gmail account or using Gmail's smtp server in ASP.NET application or if you don't have a working smtp server to send mails using your ASP.NET application or aspx page than sending e-mail using Gmail is best option.you need to write code like this First of all add below mentioned namespace in code behind of aspx page from which you want to send the mail.using System.Net.Mail;Now write this code in click event of button C# code protected void But...

   ASP.NET,Email,Send email,Gmail     2011-11-15 13:01:02

  How to undo git changes?

When using git for version control, there is frequent need on undoing commits due to some unexpected changes. This post will introduce how to undo changes with git command in different cases. Undo commit A common undo case is that some commit needs to be reverted as the commit contains error. In this case, the code is already committed. The command to revert the commit is git revert HEAD This command will add new a commit to the existing head to undo the previous commit. It will not change the p...

   GIT,GIT RESET,GIT REVERT,GIT CHECKOUT     2019-12-28 02:21:47

  A Peek Inside the Erlang Compiler

Erlang is a complex system, and I can’t do its inner workings justice in a short article, but I wanted to give some insight into what goes on when a module is compiled and loaded. As with most compilers, the first step is to convert the textual source to an abstract syntax tree, but that’s unremarkable. What is interesting is that the code goes through three major representations, and you can look at each of them. Erlang is unique among functional languages in its casual scop...

   Erlang,Peek,Erlang compiler     2012-02-08 10:12:04

  Design Secrets for Engineers

If you are a designer like me, you must be asked on a regular basis to “make it look pretty.” The request can stroke your designer ego, making you feel like a design rockstar with super powers to make this world a more beautiful place. This is especially true at startups, where you are one of the few, maybe the only designer there. However, it can also be really annoying–almost degrading at times. Thoughts like “why the hell can’t engineers do this on their o...

   Design,UI,pretty,engineer,designer font     2011-10-24 11:18:25

  Can two new objects point to the same memory address in GoLang?

Do you have any idea what the output will be for below GoLang snippet? package main import ( "fmt" ) type obj struct{} func main() { a := &obj{} fmt.Printf("%p\n", a) c := &obj{} fmt.Printf("%p\n", c) fmt.Println(a == c) } Many people would think that a and c are two different object instances which have different memory addresses. Hence a == c will be false. But if you try to run the above program, you would see below output 0x5781c8 0x5781c8 true To get to know the reason wh...

   GO,GOLANG,VARIABLE ESCAPE,ZEROBASE     2019-04-06 01:19:52

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