Tutorial by Examples: sim

Simple Switch

Switch statements compare a single test value to multiple conditions, and performs any associated actions for successful comparisons. It can result in multiple matches/actions. Given the following switch... switch($myValue) { 'First Condition' { 'First Action' } 'Second Condition' ...

Simple Switch With Break

The break keyword can be used in switch statements to exit the statement before evaluating all conditions. Example: switch('Condition') { 'Condition' { 'First Action' } 'Condition' { 'Second Action' break } 'Condition' { 'Third Action' } } Output...

Simple Switch with Default Condition

The Default keyword is used to execute an action when no other conditions match the input value. Example: switch('Condition') { 'Skip Condition' { 'First Action' } 'Skip This Condition Too' { 'Second Action' } Default { 'Default Action' } } Output: D...

Simple Bar Chart

index.html <!doctype html> <html> <head> <title>D3 Sample</title> </head> <body> <!-- This will serve as a container for our chart. This does not have to be a div, and can in fact, just be the body if you want. --> <div id=...

Simple interface

In Go, an interface is just a set of methods. We use an interface to specify a behavior of a given object. type Painter interface { Paint() } The implementing type need not declare that it is implementing the interface. It is enough to define methods of the same signature. type Rembrandt ...

Simple text input widget

The most simple example of widget is custom text input. For instance, to create an <input type="tel">, you have to subclass TextInput and set input_type to 'tel'. from django.forms.widgets import TextInput class PhoneInput(TextInput): input_type = 'tel'

Simple queries on a standalone model

Here is a simple model that we will use to run a few test queries: class MyModel(models.Model): name = models.CharField(max_length=10) model_num = models.IntegerField() flag = models.NullBooleanField(default=False) Get a single model object where the id/pk is 4: (If there are no...

Simple Date Manipulations

Get the current date. LocalDate.now() Get yesterday's date. LocalDate y = LocalDate.now().minusDays(1); Get tomorrow's date LocalDate t = LocalDate.now().plusDays(1); Get a specific date. LocalDate t = LocalDate.of(1974, 6, 2, 8, 30, 0, 0); In addition to the plus and minus methods, ...

Simple Function Documentation

function output = mymult(a, b) % MYMULT Multiply two numbers. % output = MYMULT(a, b) multiplies a and b. % % See also fft, foo, sin. % % For more information, see <a href="matlab:web('https://google.com')">Google</a>. output = a * b; end help mymult then p...

Simple number animation

One of the very basic animations that you could come across is the NumberAnimation. This animation works by changing the numeric value of a property of an item from an initial state to a final state. Consider the following complete example: import QtQuick 2.7 import QtQuick.Controls 2.0 ...

The simplest Python socket client-server example

Server side: import socket serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) serversocket.bind(('localhost', 8089)) serversocket.listen(5) # become a server socket, maximum 5 connections while True: connection, address = serversocket.accept() buf = connection.recv(6...

Simple quote example

Quote is a special operator that prevents evaluation of its argument. It returns its argument, unevaluated. CL-USER> (quote a) A CL-USER> (let ((a 3)) (quote a)) A

Create a simple application

This example comes from the official document. Suppose you have a python application using redis as backend. After writing Dockerfile, create a docker-compose.yml file like this: version: '2' services: web: build: . ports: - "5000:5000" volumes: - .:/code ...

Creating a simple Notification

This example shows how to create a simple notification that starts an application when the user clicks it. Specify the notification's content: NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this) .setSmallIcon(R.drawable.ic_launcher) // notification icon .se...

A simple TCP client and server application: echo

The following code is based on the examples provided by the documentation on std::net::TcpListener. This server application will listen to incoming requests and send back all incoming data, thus acting as an "echo" server. The client application will send a small message and expect a reply...

Simple LOOP form

Simple LOOP form without special keywords: (loop forms...) To break out of the loop we can use (return <return value>) ` Some examples: (loop (format t "Hello~%")) ; prints "Hello" forever (loop (print (eval (read)))) ; your very own REPL (loop (let ((r (read))) ...

Simple Spring Boot web application using Gradle as build system

This example assumes you have already installed Java and Gradle. Use the following project structure: src/ main/ java/ com/ example/ Application.java build.gradle build.gradle is your build script for Gradle build system with the following content: buildscri...

Simple factory (Java)

A factory decreases coupling between code that needs to create objects from object creation code. Object creation is not made explicitly by calling a class constructor but by calling some function that creates the object on behalf the caller. A simple Java example is the following one: interface Ca...

Simple Class Extending angular's Http class

import { Http, Request, RequestOptionsArgs, Response, RequestOptions, ConnectionBackend, Headers } from '@angular/http'; import { Router } from '@angular/router'; import { Observable } from 'rxjs/Observable'; import 'rxjs/add/observable/empty'; import 'rxjs/add/observable/throw'; import 'rxjs/a...

Simple Example

Take any list and add an identifier to the outer wrapper (ul, div) <ul id="sortable"> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> <li>Item 4</li> </ul> In your jquery: $(function(){ $('#sortable').sortable({ ...

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