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  A simple example of git bisect command

git bisect is a very powerful command for finding out which commit is a bad commit when bug occurs.  The rationale behind this command is that it pin locates the bad commit by divide and conquer. It divides the commit history into two equal parts, then determines whether the bad commit is at the first half or at the other half. This process will continue until the bad commit is located. Here is a really good example created by bradleyboy, this is a simple git repository which demonstr...

   GITHUB,GIT,GIT BISECT     2019-07-12 10:31:51

  Python Disrupts the Programming Language World- Gets Hot and Popular

Python is one of the fastest growing languages currently. It is undeniable that more and more programmers use Python and deploy it to the best of their use. Everyone, from the freelancer and startups to giant corporations and even governments, is using Python. Let us have a look at the reasons that make it so popular.  Training: According to research, 8 out of 10 tech schools in the US teach Python over JAVA. Even the three major MOOC platforms, edX, Coursera, and Udacity have a similar app...

   DEVELOPMENT,PYTHON,TEAM     2018-06-07 01:02:03

  Some hidden XSS injection vulnerabilities

XSS injection refers to a Web page generates some unexpected executable js codes based on user input  and these executable codes are executed by web browser,i.e, the source code sent to web browser by the server contains some illegal js codes, and these illegal js codes are related to user's input. Common XSS injection vulnerabilities can be fixed with some functions such as htmlspecialchars(escaping HTML special characters) and strip_tags() or similar, but there are some hidden XSS injecti...

   XSS,PHP,Security,Code,JavaScript     2012-08-27 20:32:08

  Oracle released an urgent Java patch

On March 23, Oracle just released an urgent Java patch which is out of its normal update schedule. The security vulnerability is related to the Java SE running in web browsers on desktops. The CVE ID for this issue is CVE-2016-0636. With the unpatched Java, attackers can remotely exploit the target system without username and credentials. Successful exploits can impact the availability, integrity, and confidentiality of the user's system. When the user access pages containing malicious code...

   JAVA,SECURITY,ORACLE,NEWS     2016-03-25 08:39:59

  Do you still remember things you saw around you as a kid

I believe we all have unforgettable childhood, we might see many weird stuff around us and had deep impression about some cool stuff. Some of the old stuff may extinct now but every time when we saw an item rare to be seen, the old memories may flush into our brain immediately and we would be excited about it. Can you still remember things around you as a kid? Here are some of them, if you were born at 80's or 90's, you may be familiar with these. 1. Windows 95 and Windows 98 We could see these ...

   Childhood,Internet     2013-11-25 08:58:58

  Get hostname from a URL using JavaScript

Sometimes we may have strings which contain some UR;s and we may want to retrieve the hostname from the URLs for some statistic use. For example, we may have a URL : http://www.example.com/aboutus.html. We may want to retrieve the www.example.com from the URL. How? Use regular expression. Here I give an example using JavaScript. If you want to check whether a string is a URL or not. Refer to Detect URLs in a Block of Text. In JavaScript, we can have a regular expression like var pattern=/(.+:\/\...

   JavaScript,URL,regular expression, Hostname     2012-06-15 09:16:45

  My favorite quotes from "The design and evolution of C++"

"The design and evolution of C++" is a book written by the inventor of C++  Bjarne stroustrup. In this book, Bjarne stroustrup presents the definitive insider's guide to the design and development of the C++ programming language. Without ommitting critical details or getting bogged down in technicalities, Stroustrup presents his unique insights into the decisions that shaped C++. In this book, some statements are very impressive. They are concise but convey much information. Here I summariz...

   C++,statements,type system,compatibility     2012-07-16 10:58:10

  Java Cipher encryption/decryption example

In Java, Cipher is the API for doing data encryption/decryption. Many cryptographic algorithms such as AES, DES, RC4 etc can be specified when creating Cipher instance. The Cipher instance calls the underlying algorithm specific implementation to do the actual encryption/decryption.  Before doing the encryption/decryption, a key needs to be created and it will be used to do the encryption/decryption. A sample program for performing all these is : import java.security.Key; import javax.cryp...

   Java, Java Security, Cipher, Example, Sample     2015-08-14 07:07:10

  Password-less login

Most websites need user login in order to provide personalized content to visitors. The usual way is to request user to register an user account. Actually, this is not so appealing since if we need to remember one password for each website, it's troublesome, while for developers, it's their responsibility to protect password, once password is leaked, then it's a big headache to a website's business and reputation. So long time ago people started thinking about password-less login, this is a big ...

   Password-lesslogin,Authentication     2012-11-05 12:29:55

  Will nil == nil be true in GoLang

There is some interview question may ask whether nil == nil be true in GoLang. Wil it be true. false or compilation error? To know the answer, some knowledge about nil in GoLang needs to be explained first. nil definition According to Go's official documentation, the definition of nil is // nil is a predeclared identifier representing the zero value for a // pointer, channel, func, interface, map, or slice type. var nil Type // Type must be a pointer, channel, func, interface, map, or slice type...

   GOLANG,NIL,NIL EXPLANATION     2021-08-08 02:54:15

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