Tutorial by Examples: v

#include <Servo.h> Servo srv; void setup() { srv.attach(9); // Attach to the servo on pin 9 } To use a servo, you need to call attach() function first. It starts generating a PWM signal controlling a servo on a specified pin. On boards other than Arduino Mega, use of Servo lib...

Custom Setting Custom Setting Field Custom Setting Field Value When the field is checked the validation rule will be disabled, for the running user or in this example, their profile - The rule can also be disabled for a whole Salesforce org - Validation Rule AND( /* the below is the...

Resolving scoped services during application startup can be difficult, because there is no request and hence no scoped service. Resolving a scoped service during application startup via app.ApplicationServices.GetService<AppDbContext>() can cause issues, because it will be created in the sc...

A great existing example of the Adapter pattern can be found in the SWT MouseListener and MouseAdapter classes. The MouseListener interface looks as follows: public interface MouseListener extends SWTEventListener { public void mouseDoubleClick(MouseEvent e); public void mouseDown(MouseE...

The image contained in the ImageView may not fit the exact size given to the container. In that case, the framework allows you to resize the image in a number of ways. Center <ImageView android:layout_width="20dp" android:layout_height="20dp" andr...

Scale the image uniformly (maintain the image's aspect ratio) so that both dimensions (width and height) of the image will be equal to or larger than the corresponding dimension of the view (minus padding). Official Docs When the image matches the proportions of the container: When the image is...

Scale the image uniformly (maintain the image's aspect ratio) so that both dimensions (width and height) of the image will be equal to or less than the corresponding dimension of the view (minus padding). Official Docs It will center the image and resize it to the smaller size, if both container s...

Scale the image using START. Scale the image using END. Official Docs FitStart This will fit to the smallest size of the container, and it will align it to the start. <ImageView android:layout_width="200dp" android:layout_height="200dp" android:src...

Scale the image using CENTER. Official Docs This expands the image to try to match the container and it will align it to the center, it will fit to the smaller size. Bigger height ( fit to width ) Same width and height.

Scale the image using FILL. Official Docs <ImageView android:layout_width="100dp" android:layout_height="200dp" android:src="@mipmap/ic_launcher" android:id="@+id/imageView" android:scaleType="fitXY&quo...

This is a client-server example. The process forks and runs client in the parent process and server in the child process: client connects to server and waits until server exits; server accepts connection from client, enables keepalive, and waits any signal. Keepalive is configured using the f...

This is a TCP daytime iterative server kept as simple as possible. #include <sys/types.h> /* predefined types */ #include <unistd.h> /* unix standard library */ #include <arpa/inet.h> /* IP addresses conversion utilities */ #include <netinet/in.h> /* sockaddr...

If, during the conversion of: an integer type to a floating point type, a floating point type to an integer type, or a floating point type to a shorter floating point type, the source value is outside the range of values that can be represented in the destination type, the result is undefine...

function onButtonClick() { navigator.bluetooth.requestDevice({filters: [{services: ['battery_service']}]}) .then(device => { // Connecting to GATT Server... return device.gatt.connect(); }) .then(server => { // Getting Battery Service... return server.getPri...

function onButtonClick() { navigator.bluetooth.requestDevice({filters: [{services: ['heart_rate']}]}) .then(device => { // Connecting to GATT Server... return device.gatt.connect(); }) .then(server => { // Getting Heart Rate Service... return server.getP...

Jersey is one of the many frameworks available to create Rest Services, This example will show you how to create Rest Services using Jersey and Spring Boot 1.Project Setup You can create a new project using STS or by using the Spring Initializr page. While creating a project, include the followi...

All proxy services events are logged in the wso2carbon log file (located in %CARBON_HOME%/repository/logs). If you want, you can have separate log files for each proxy service. Keep in mind, though, that they will still be logged in wso2carbon log file as well. To do so, you should change the log4...

To check if a method was called on a mocked object you can use the Mockito.verify method: Mockito.verify(someMock).bla(); In this example, we assert that the method bla was called on the someMock mock object. You can also check if a method was called with certain parameters: Mockito.verify(som...

If a scoped enum is converted to an integral type that is too small to hold its value, the resulting value is unspecified. Example: enum class E { X = 1, Y = 1000, }; // assume 1000 does not fit into a char char c1 = static_cast<char>(E::X); // c1 is 1 char c2 = static_cast<c...

While you can use the NSUserDefaults methods anywhere, it can sometimes be better to define a manager that saves and reads from NSUserDefaults for you and then use that manager for reading or writing your data. Suppose that we want to save a user’s score into NSUserDefaults. We can create a class ...