Tutorial by Topics: h

When using async callback we need to consider scope. Especially if inside a loop. This simple article shows what not to do and a simple working example.

This section provides an overview of what tvos is, and why a developer might want to use it. It should also mention any large subjects within tvos, and link out to the related topics. Since the Documentation for tvos is new, you may need to create initial versions of those related topics.

This client downloads a complete copy of the headers for all blocks in the entire block chain. This means that the download and storage requirements scale linearly with the amount of time since Bitcoin was invented.

mock.Setup(expression).Returns(value) //Whenever called the method in the expression will return value ParameterDetailsexpressionLambda expression that specifies the method invocation.

You can use Pentaho Data Integration (Kettle) to Transfer Data from One Database to another. Its very easy as the transformation is automatically created just by creating the connection.and it can transfer Lacs of records very quickly.

Sometimes is more usefull make a call to a model's method in our view, so this is a way to make it

In this topic Spark Users can find different configurations of Spark SQL, which is the most used component of Apache Spark framework.

Garbage Collection (GC) is a way of automatically reclaiming memory that is occupied by objects that are no longer needed by a program. This is in contrast with manual memory management where the programmer explicitly specifies which objects should be deallocated and returned to memory. Good GC-s...

A column is NULL when it has no value, regardless of the data type of that column. A column should never be compared to NULL using this syntax a = NULL as the result would be UNKNOWN. Instead use a IS NULL or a IS NOT NULL conditions. NULL is not equal to NULL. To compare two expressions where null...

C++/CLI is a Microsoft-specific dialect of C++ which interoperates well with .NET. Originally, it was envisioned as the "most powerful" of .NET languages and included designer support for WinForms applications. However, new development on C++/CLI has all but ceased, and Microsoft now ...

This section provides an overview of what mqtt is, and why a developer might want to use it. It should also mention any large subjects within mqtt, and link out to the related topics. Since the Documentation for mqtt is new, you may need to create initial versions of those related topics.

Input and Output in scheme is usually handled trough ports. A port is a data structure which is used to interact with the world outside Scheme. A Port isn't limited to files but can be used to read/write to sockets. In some ways, the port object is some kind of universal object that can not onl...

This section provides an overview of what automation is, and why a developer might want to use it. It should also mention any large subjects within automation, and link out to the related topics. Since the Documentation for automation is new, you may need to create initial versions of those rel...

The data.table package has undergone a number of changes and innovations over time. Here are some potential pitfalls that can help users looking at legacy code or reviewing old blog posts.

A notorious common question is "how to send notifications from device to device", sadly the answer is: you can't. FCM needs to be triggered in order to send push notifications. That can be done in 3 different ways: Directly in the Firebase web console Setting a Firebase Functions li...

Examples on how to save the created Excel sheet to the Disk or send it to the Browser.

When you receive an error: "Microsoft Access has encountered a problem and needs to close", there is often not a lot of information to help you identify the cause of the error. Below are a series of steps you can take to troubleshoot the cause of the errors. Be sure to remove other vari...

This section provides an overview of what amazon-cloudformation is, and why a developer might want to use it. It should also mention any large subjects within amazon-cloudformation, and link out to the related topics. Since the Documentation for amazon-cloudformation is new, you may need to cre...

Instance method are methods that are specific to particular classes. Instance methods are declared and defined followed by - (minus) symbol. Class methods can be called by class name itself .Class methods are declared and defined by using + (plus)sign . -(void)testInstanceMethod; //Class meth...