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import javax.ws.rs.FormParam; import javax.ws.rs.POST; import javax.ws.rs.Path; import javax.ws.rs.core.Response; @Path("hello") public class HelloWorldResource { @POST @Path("/receiveParams") public Response receiveHello(@FormParam("name") String ...

Often in R you'll want to know things about an object or variable you're working with. This can be useful when reading someone else's code or even your own, especially when using packages that are new to you. Suppose we create a variable a: a <- matrix(1:9, 3, 3) What data type is this? Yo...

Arrow is an elegant JSON parsing library in Swift. It allows to parse JSON and map it to custom model classes with help of an <-- operator: identifier <-- json["id"] name <-- json["name"] stats <-- json["stats"] Example: Swift model struct Profile {...

The Oracle Java Style Guide states: Modifiers should not be written out when they are implicit. (See Modifiers in Oracle Official Code Standard for the context and a link to the actual Oracle document.) This style guidance applies particularly to interfaces. Let's consider the following code ...

In this exercise, we will generate four bootstrap linear regression models and combine the summaries of these models into a single data frame. library(broom) #* Create the bootstrap data sets BootData <- lapply(1:4, function(i) mtcars[sample(1:nrow(mtcars), ...

The degree of parallelism is the maximum number of concurrently executing tasks that will be used to process the query. var sequence = Enumerable.Range(1, 10000); var evenNumbers = sequence.AsParallel() .WithDegreeOfParallelism(4) .Where(x =&gt...

This example shows how PLINQ can be used to calculate the even numbers between 1 and 10,000 using multiple threads. Order will be maintained in the resulting list, however keep in mind that AsOrdered may hurt performance for a large numbers of elements, so un-ordered processing is preferred when pos...

Ordered sequences may hurt performance when dealing with a large number of elements. To mitigate this, it's possible to call AsUnordered when the sequence order is no longer necessary. var sequence = Enumerable.Range(1, 10000).Select(x => -1 * x); // -1, -2, ... var evenNumbers = sequence.AsPar...

Derives from Object Key members public Dispatcher Dispatcher { get; } Summary Most objects in WPF derive from DispatcherObject, which provides the basic constructs for dealing with concurrency and threading. Such objects are associated with a Dispatcher. Only the thread that the Dispatcher w...

Derives from DispatcherObject Key members public object GetValue(DependencyProperty dp); public void SetValue(DependencyProperty dp, object value); Summary Classes derived from DependencyObject participate in the dependency property system, which includes registering dependency properties ...

a, b = 1, 2 import math math.sin(a) # returns the sine of 'a' in radians # Out: 0.8414709848078965 math.cosh(b) # returns the inverse hyperbolic cosine of 'b' in radians # Out: 3.7621956910836314 math.atan(math.pi) # returns the arc tangent of 'pi' in radians # Out: 1.2626272556789...

In case your activities, fragments and UI require some background processing a good thing to use is a MockWebServer which runs localy on an android device which brings a closed and testable enviroment for your UI. https://github.com/square/okhttp/tree/master/mockwebserver First step is including t...

The power of idling resources lies in not having to wait for some app's processing (networking, calculations, animations, etc.) to finish with sleep(), which brings flakiness and/or prolongs the tests run. The official documentation can be found here. Implementation There are three things that you...

fastlane is an open source build automation tool for Android and iOS for developers. It reduce your build generation time. It is a command line tool that uses Ruby, so you need Ruby on your computer. Most Macs already have Ruby installed by default. Install fastlane Open a terminal. Run sudo ge...

As Angular uses HTML to extend a web page and plain Javascript to add logic, it makes it easy to create a web page using ng-app, ng-controller and some built-in directives such as ng-if, ng-repeat, etc. With the new controllerAs syntax, newcomers to Angular users can attach functions and data to the...

Like in many other languages, Python uses the % operator for calculating modulus. 3 % 4 # 3 10 % 2 # 0 6 % 4 # 2 Or by using the operator module: import operator operator.mod(3 , 4) # 3 operator.mod(10 , 2) # 0 operator.mod(6 , 4) # 2 You can also use negative nu...

This is the basic HTML file that can be used as a boilerplate when starting a project. This boilerplate uses orbit controls with damping (camera that can move around an object with deceleration effect) and creates a spinning cube. <!DOCTYPE html> <html> <head> <t...

Factors are one method to represent categorical variables in R. Given a vector x whose values can be converted to characters using as.character(), the default arguments for factor() and as.factor() assign an integer to each distinct element of the vector as well as a level attribute and a label attr...

public function drawDisplayObjectUsingBounds(source:DisplayObject):BitmapData { var bitmapData:BitmapData;//declare a BitmapData var bounds:Rectangle = source.getBounds(source);//get the source object actual size //round bounds to integer pixel values (to aviod 1px str...

One of the most common errors in compilation happens during the linking stage. The error looks similar to this: $ gcc undefined_reference.c /tmp/ccoXhwF0.o: In function `main': undefined_reference.c:(.text+0x15): undefined reference to `foo' collect2: error: ld returned 1 exit status $ So l...