Tutorial by Examples: com

Suppose we have an API which allows us to get object metadata in single request (getAllPets), and other request which have full data of single resource (getSinglePet). How we can query all of them in a single chain? public class PetsFetcher { static class PetRepository { List<Integer&g...

# Create 100 standard normals in a vector x <- rnorm(100, mean = 0, sd = 1) # Find the lenght of a vector length(x) # Compute the mean mean(x) # Compute the standard deviation sd(x) # Compute the median value median(x) # Compute the range (min, max) range(x) # Sum an itera...

Visual Studio Community 2017 Free, fully-featured IDE for students, open-source and individual developer Visual Studio Professional 2017 Professional developer tools, services, and subscription benefits for small teams Visual Studio Enterprise 2017 End-to-end solution to meet demand...

service.ts: import { Injectable } from '@angular/core'; @Injectable() export class AppState { public mylist = []; } parent.component.ts: import {Component} from '@angular/core'; import { AppState } from './shared.service'; @Component({ selector: 'parent-example', templ...

parent.component.ts: import {Component} from '@angular/core'; @Component({ selector: 'parent-example', templateUrl: 'parent.component.html', }) export class ParentComponent { mylistFromParent = []; add() { this.mylistFromParent.push({"itemName":"Something&...

To create a component we add @Component decorator in a class passing some parameters: providers: Resources that will be injected into the component constructor selector: The query selector that will find the element in the HTML and replace by the component styles: Inline styles. NOTE: DO NOT us...

hero.component.html <form (ngSubmit)="submit($event)" [formGroup]="form" novalidate> <input type="text" formControlName="name" /> <button type="submit">Show hero name</button> </form> hero.component.ts import...

Components will render in their respective selector, so you can use that to nest components. If you have a component that shows a message: import { Component, Input } from '@angular/core'; @Component({ selector: 'app-required', template: `{{name}} is required.` }) export class RequiredC...

C++ & Java are both object-oriented languages, thus the following diagram applies to both.

data.service.ts: import { Injectable } from '@angular/core'; import { Http } from '@angular/http'; import 'rxjs/add/operator/map'; @Injectable() export class DataService { constructor(private http: Http) { } fetchData(){ return this.http.get('https://dinstruct-d4b62.firebaseio....

This example requires FormsModule and ReactiveFormsModule. Please import them in your application/module. import {FormsModule, ReactiveFormsModule} from '@angular/forms'; input-form-example.html <form class="example-form" (ngSubmit)="submit(addForm.value)" [formGroup]=&qu...

This example requires FormsModule and ReactiveFormsModule. Please import them in your application/module. import {FormsModule, ReactiveFormsModule} from '@angular/forms'; autocomplete-overview-example.html: <md-input-container> <input mdInput placeholder="State" [mdAutocom...

Project build.gradle allprojects { repositories { jcenter() // Add this if you use Gradle 4.0+ google() // Add this if you use Gradle < 4.0 maven { url 'https://maven.google.com' } } } ext { archVersion = '1.0.0-alpha5' } Applic...

Extend your activity from this activity public abstract class BaseCompatLifecycleActivity extends AppCompatActivity implements LifecycleRegistryOwner { // We need this class, because LifecycleActivity extends FragmentActivity not AppCompatActivity @NonNull private final LifecycleRe...

Each UI component lifecycle changed as shown at image. You may create component, that will be notified on lifecycle state change: public class MyLocationListener implements LifecycleObserver { private boolean enabled = false; private Lifecycle lifecycle; public MyLocationListener(...

Sometime you will need to know, with 2 dates objects, if there are corresponding to the same date, or find which date is after the other. In Go, there is 4 way to compare dates: date1 == date2, returns true when the 2 are the same moment date1 != date2, returns true when the 2 are different mom...

Data item is stored in packed decimal format in COMP-3. Packed-decimal format means that each byte of storage (except for the low order byte) can contain two decimal numbers. The low-order byte contains one digit in the leftmost portion and the sign (positive or negative) in the rightmost portion. ...

This example requires MdDialogRef and MD_DIALOG_DATA. Please import them in the component module. import {MdDialog, MdDialogRef, MD_DIALOG_DATA} from '@angular/material'; input-overview-example.html: <md-input-container> <input mdInput [(ngModel)]="id" ...

To generate json user model with username, password_hash, email_id, created_at, updated_at, type mix phoenix.gen.json User users username:string email_id:string password_hash:string timestamps()

This example grabs the Node.gitignore file from GitHub's gitignore repository, downloads it to your current working directory and renames it to .gitignore - all very typical actions for someone starting a new node.js project. $ curl http://github.com/github/gitignore/raw/master/Node.gitignore -o .g...