Tutorial by Examples: t

First, lets overview what we need in order to setup Hibernate correctly. @EnableTransactionManagement and @EnableJpaRepositories - we want transactional management and to use spring data repositories. DataSource - main datasource for the application. using in-memory h2 for this example. LocalCo...

A simple entity: Using Lombok @Getter and @Setter annotations to generate getters and setters for us @Entity @Getter @Setter public class Message { @Id @GeneratedValue(generator = "system-uuid") @GenericGenerator(name = "system-uuid", strategy = "uuid...

In order to expose Thymeleaf templates we need to define controllers. Example: @Controller @RequestMapping("/") public class MessageController { @Autowired private MessageRepository messageRepository; @GetMapping public ModelAndView index() { It...

Html.TextBox() @Html.TextBox("Name", null, new { @class = "form-control" }) output:<input class="form-control" id="Name"name="Name"type="text"value=""/> @Html.TextBox("Name", "Stack Overflow", new { ...

First, install ipset if needed. Please refer to your distribution to know how to do it. As an example, here is the command for Debian-like distributions. $ apt-get update $ apt-get install ipset Then create a configuration file to define an ipset containing the IPs for which you want to open ac...

Work in progress

Work in progress

Let's say we want to eliminate duplicated subsequence element from a string (it can be more than one). For example: 2,14,14,14,19 and convert it into: 2,14,19 Using gsub, we can achieve it: gsub("(\\d+)(,\\1)+","\\1", "2,14,14,14,19") [1] "2,14,19" ...

It is a common practice to name files using the date as prefix in the following format: YYYYMMDD, for example: 20170101_results.csv. A date in such string format can be verified using the following regular expression: \\d{4}(0[1-9]|1[012])(0[1-9]|[12][0-9]|3[01]) The above expression considers d...

iex(1)> [x, y] = ["String1", "String2"] iex(2)> "#{x} #{y}" # "String1 String2"

["String1", " ", "String2"] |> IO.iodata_to_binary # "String1 String2" This will gives some performances boosts as strings not duplicated in memory. Alternative method: iex(1)> IO.puts(["String1", " ", "String2"]) # ...

The typeid keyword is a unary operator that yields run-time type information about its operand if the operand's type is a polymorphic class type. It returns an lvalue of type const std::type_info. Top-level cv-qualification are ignored. struct Base { virtual ~Base() = default; }; struct Deri...

Instead of invoking the Angular’s bootstrap code directly, wrap the bootstrap code into a function and export the function. This function can also accept parameters. import { platformBrowserDynamic } from "@angular/platform-browser-dynamic"; import { AppModule } from "./src/app&quot...

In android, every developer uses Anonymous Class (Runnable) at least once in a project. Any Anonymous Class has a reference to its parent (activity). If we perform a long-running task, the parent activity will not be destroyed until the task is ended. Example uses handler and Anonymous Runnable cla...

Abstract Class : package base; /* Abstract classes cannot be instantiated, but they can be subclassed */ public abstract class ClsVirusScanner { //With One Abstract method public abstract void fnStartScan(); protected void fnCheckForUpdateVersion(){ System....

Navigate to project's app module and create libs directory. Place your .aar file there. For example myLib.aar. Add the code below to android block of app level's build.gradle file. repositories { flatDir { dirs 'libs' } } This way you defined a new ext...

Sometimes you would want to start or remove an action on a specific node at a certain time. For example, you might want to stop a moving object when the user taps the screen. This becomes very helpful when a node has multiple actions and you only wants to access one of them. let move = SKAction.mov...

package main import ( "fmt" "k8s.io/client-go/1.5/kubernetes" "k8s.io/client-go/1.5/pkg/api/v1" "k8s.io/client-go/1.5/rest" ) func main() { config, err = rest.InClusterConfig() if err != nil { return nil, err } ...

Objectives: Using the Spring CLI, we will create a new Spring Boot application to be deployed to Elastic Beanstalk. We will edit the generated Spring Boot application so that it will: Create a jar named aws-eb-demo.jar. Listen on port 5000. Include a single web page named index.html. ...

Code echo get_permalink(); Output The link of the current page, for example: http://website.com/category/name-of-post/