Tutorial by Examples: t

Suppose we have a POJO class User we need to validate. public class User { @NotEmpty @Size(min=5) @Email private String email; } and a controller method to validate the user instance public String registerUser(@Valid User user, BindingResult result); Let's extend the U...

Component: <md2-select [(ngModel)]="item" (change)="change($event)" [disabled]="disabled"> <md2-option *ngFor="let i of items" [value]="i.value" [disabled]="i.disabled"> {{i.name}}</md2-option> </md2-select> ...

Tooltip is a directive, it allows the user to show hint text while the user mouse hover over an element. A tooltip would have the following markup. <span tooltip-direction="left" tooltip="On the Left!">Left</span> <button tooltip="some message" ...

Toast is a service, which show notifications in the view. Creates and show a simple toast noticiation. import {Md2Toast} from 'md2/toast/toast'; @Component({ selector: "..." }) export class ... { ... constructor(private toast: Md2Toast) { } toastMe() { this.toast.show(...

Assume that, we implement a simple API and we have the following models. class Parent(models.Model): name = models.CharField(max_length=50) class Child(models.Model): parent = models.ForeignKey(Parent) child_name = models.CharField(max_length=80) And we want to return a respo...

This command allows you to change or view the TLD (top-level domain) used to bind domains to your local machine. Get The Current TLD $ valet domain > dev Set the TLD $ valet domain local > Your Valet domain has been updated to [local].

Datepicker allow the user to select date and time. <md2-datepicker [(ngModel)]="date"></md2-datepicker> see for more details here

Detailed instructions on getting avr set up or installed.

DirectByteBuffer is special implementation of ByteBuffer that has no byte[] laying underneath. We can allocate such ByteBuffer by calling: ByteBuffer directBuffer = ByteBuffer.allocateDirect(16); This operation will allocate 16 bytes of memory. The contents of direct buffers may reside outside ...

creating custom exception 'P2222': create or replace function s164() returns void as $$ begin raise exception using message = 'S 164', detail = 'D 164', hint = 'H 164', errcode = 'P2222'; end; $$ language plpgsql ; creating custom exception not assigning errm: create or replace function s...

https://api.telegram.org/bot*BOTTOKEN*/sendmessage?chat_id=exampleID&text=exampleText&parse_mode=HTML What does this do? With your parameters adjusted correctly this call will send a message to the exampleID user with the exampleText as message with an HTML encoding. Standard encoding is ma...

In Kotlin, we can declare variable which can hold null reference. Suppose we have a nullable reference a, we can say "if a is not null, use it, otherwise use some non-null value x" var a: String? = "Nullable String Value" Now, a can be null. So when we need to access value o...

Detailed instructions on getting greasemonkey set up or installed.

Function using promises: function myAsyncFunction() { return aFunctionThatReturnsAPromise() // doSomething is a sync function .then(result => doSomething(result)) .catch(handleError); } So here is when Async/Await enter in action in order to get clean...

Prerequisites: Java is installed Selenium is extracted in a folder (Contains 2 files, and 1 folder) Follow these steps to set up IntelliJ Idea for Selenium. Click On "New Project". Choose Java < "Hello World" Application Type the name of the Project, and create it....

Prerequisites : ChromeDriver is downloaded Copy the following code into your class. public static void main(String[] args) { System.setProperty("webdriver.chrome.driver", "path of the exe file\\chromedriver.exe"); } If you're using linux, give the path to the ChromeDri...

We use the get method to go to a website. For Example, this would open google public static void main(String[] args) throws InterruptedException { System.setProperty("webdriver.chrome.driver", "path of the exe file\\chromedriver.exe"); WebDriver driver = new ChromeDriv...

Every Html-Element in Selenium is called a WebElement. For example, a p tag would be a WebElement, an a tag would be a WebElement, etc. Consider the following html Structure: <a id="link1" href="https://www.google.com">google</a> <p class="p1"> This...

To get the attribute of a WebElement, we use getAttribute on that WebElement. For example, consider the following html tag <a id="click" href="https://www.google.com"> We can find the Element's href attribute by WebElement e = driver.findElement(By.id("click&quot...

Intoduction Object Oriented Programming (mostly referred as OOP) is a programming paradigm for solving problems. The beauty an OO (object oriented) program, is that we think about the program as a bunch of objects communicating with each other, instead of as a sequential script following specific ...