Tutorial by Topics: ion

The value null is the default value for an uninitialized value of a field whose type is a reference type. NullPointerException (or NPE) is the exception that is thrown when you attempt to perform an inappropriate operation on the null object reference. Such operations include: calling an inst...

Step definitions are in the programming language supported by a given implementation of Cucumber. This topic gives examples of step definitions in each supported programming language and examples of using Cucumber API calls in step definitions.

ParameterUsagehostnameThis parameter tells the host to which the connection needs to be establishedusernameusername required to access the hostporthost portpasswordpassword for the account

Digital Image Processing and Computer Vision is an interesting field since it is beautifully located between in Mathematics and Computer Science. Therefore, it is very helpful to understand the fundamentals and apply them using programming to understand the topic. Digital images are discretizatio...

for ($i = 0; $i < count($array); $i++) { incremental_iteration(); } for ($i = count($array) - 1; $i >= 0; $i--) { reverse_iteration(); } foreach ($data as $datum) { } foreach ($data as $key => $datum) { } foreach ($data as &$datum) { } Comparison of methods to iterate an ...

When we analyze the performance of the sorting algorithm, we interest primarily on the number of comparison and exchange. Average Exchange Let En be the total average number of exchange to sort array of N element. E1 = 0 (we do not need any exchange for array with one element). The average num...

AnnotationDetails@OneToOneSpecifies a one to one relationship with a corresponding object.@OneToManySpecifies a single object that maps to many objects.@ManyToOneSpecifies a collection of objects that map to a single object.@EntitySpecifies an object that maps to a database table.@TableSpecifies wh...

ser.read(size=1) ser.readline() ser.write() parameterdetailsportDevice name e.g. /dev/ttyUSB0 on GNU/Linux or COM3 on Windows.baudratebaudrate type: int default: 9600 standard values: 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 11520...

The function parse convert text and files into expressions. The function eval evaluate expressions.

Regular expressions (also called "regex" or "regexp") define patterns that can be matched against a string. Type ?regex for the official R documentation and see the Regex Docs for more details. The most important 'gotcha' that will not be learned in the SO regex/topics is that mo...

Pester is a test framework for PowerShell that allows you to run test cases for you PowerShell code. It can be used to run ex. unit tests to help you verify that your modules, scripts etc. work as intended. What is Pester and Why Should I Care?

PowerShell modules bring extendibility to the systems administrator, DBA, and developer. Whether it’s simply as a method to share functions and scripts. Powershell Functions are to avoid repitetive codes. Refer [PS Functions][1] [1]: PowerShell Functions PowerShell Scripts are used for automating...

Special Characters *?+[(){}^$|\./

Wikipedia definition of dependency injection is: In software engineering, dependency injection is a software design pattern that implements inversion of control for resolving dependencies. A dependency is an object that can be used (a service). An injection is the passing of a dependency to a dep...