Tutorial by Examples: er

To influence property lookup, the get handler must be used. In this example, we modify property lookup so that not only the value, but also the type of that value is returned. We use Reflect to ease this. let handler = { get(target, property) { if (!Reflect.has(target, property)) { ...

std::async: performs an asynchronous operation. std::future: provides access to the result of an asynchronous operation. std::promise: packages the result of an asynchronous operation. std::packaged_task: bundles a function and the associated promise for its return type.

This sample used to common function for all type object serialization and deserialization. using System.Runtime.Serialization.Formatters.Binary; using System.Xml.Serialization; namespace Framework { public static class IGUtilities { public static string Serialization(this T obj) ...

File exists: Sub FileExists() Dim fso as Scripting.FileSystemObject Set fso = CreateObject("Scripting.FileSystemObject") If fso.FileExists("D:\test.txt") = True Then MsgBox "The file is exists." Else MsgBox "The file isn't exist...

Copy: Sub CopyFile() Dim fso as Scripting.FileSystemObject Set fso = CreateObject("Scripting.FileSystemObject") fso.CopyFile "c:\Documents and Settings\Makro.txt", "c:\Documents and Settings\Macros\" End Sub Move: Sub MoveFile() Dim fso as Scri...

Create: Sub CreateFolder() Dim fso as Scripting.FileSystemObject Set fso = CreateObject("Scripting.FileSystemObject") fso.CreateFolder "c:\Documents and Settings\NewFolder" End Sub Copy: Sub CopyFolder() Dim fso as Scripting.FileSystemObject Set fso...

Get file name: Sub GetFileName() Dim fso as Scripting.FileSystemObject Set fso = CreateObject("Scripting.FileSystemObject") MsgBox fso.GetFileName("c:\Documents and Settings\Makro.txt") End Sub Result: Makro.txt Get base name: Sub GetBaseName() Dim fso ...

To let RestTemplate understand generic of returned content we need to define result type reference. org.springframework.core.ParameterizedTypeReference has been introduced since 3.2 Wrapper<Model> response = restClient.exchange(url, HttpMethod.GET, ...

F() expressions can be used to execute arithmetic operations (+, -, * etc.) among model fields, in order to define an algebraic lookup/connection between them. Let model be: class MyModel(models.Model): int_1 = models.IntegerField() int_2 = models.IntegerField() Now lets assum...

This example demonstrates the use of GET, POST, PUT and DELETE HTTP Methods in doing CRUD operations on a REST resource I am using the below software, frameworks and tools: Jersey 2.25.1 JDK 1.7.x (Java 7) Eclipse IDE Kepler Apache Maven 3.3.9 Apache Tomcat 7.x Please follow the below ste...

The first standalone R script Standalone R scripts are not executed by the program R (R.exe under Windows), but by a program called Rscript (Rscript.exe), which is included in your R installation by default. To hint at this fact, standalone R scripts start with a special line called Shebang line, ...

As a workaround, you may use the wildfly-specific VFS api and write your own ResourceAcessor implementation, such as this one below. public class WildflyVFSClassLoaderResourceAccessor extends AbstractResourceAccessor { private ClassLoader classLoader; public WildflyVFSClassLoaderResou...

In the new Angular framework, Components are the main building blocks that compose the user interface. So one of the first steps that helps an AngularJS app to be migrated to the new Angular is to refactor it into a more component-oriented structure. Components were also introduced in the old Angu...

The operators <, <=, > and >= are binary operators for comparing numeric types. The meaning of the operators is as you would expect. For example, if a and b are declared as any of byte, short, char, int, long, float, double or the corresponding boxed types: - `a < b` tests if the v...

Decoding the chunks of a PNG file demonstrates Okio in practice. private static final ByteString PNG_HEADER = ByteString.decodeHex("89504e470d0a1a0a"); public void decodePng(InputStream in) throws IOException { try (BufferedSource pngSource = Okio.buffer(Okio.source(in))) { Byt...

ByteStrings and Buffers Okio is built around two types that pack a lot of capability into a straightforward API: ByteString is an immutable sequence of bytes. For character data, String is fundamental. ByteString is String's long-lost brother, making it easy to treat binary data as a value. This c...

To see you unit tests go to Test -> Windows -> Code Coverage Results (Figure 1) It will open the following window (Figure 2) The window is now empty Go to the Test menu -> Analyze Code Coverage (Figure 3) The tests will now be run as well (See the results in the T...

Override Pagination Style: Every available pagination style can be overridden by creating a new class that inherits from one of the available styles and then alters its parameters: class MyPagination(PageNumberPagination): page_size = 20 page_size_query_param = 'page_size' max_page...

The nil-coalescing operator <OPTIONAL> ?? <DEFAULT VALUE> unwraps the <OPTIONAL> if it contains a value, or returns <DEFAULT VALUE> if is nil. <OPTIONAL> is always of an optional type. <DEFAULT VALUE> must match the type that is stored inside <OPTIONAL>. T...

Lets assume that we have a complex api, with many generic views and some generic viewsets. We want to enable PageNumberPagination to every view, except one (either generic view or viewset, does not make a difference) for which we want a customized case of LimitOffsetPagination. To achieve that we n...