Tutorial by Examples: e

The CASE-statement is a lot more strict than the IF/ELSE-conditional. It can only compare a single variable and only equality, not larget/smaller than etc. DEFINE VARIABLE c AS CHARACTER NO-UNDO. CASE c: WHEN "A" THEN DO: RUN procedureA. END. WHEN "B" ...

IF THEN ELSE can also be used like a function to return a single value. This is a lot like the ternary ?-operator of C. DEFINE VARIABLE i AS INTEGER NO-UNDO. DEFINE VARIABLE c AS CHARACTER NO-UNDO. /* Set c to "low" if i is less than 5 otherwise set it to "high" c...

The DICOM Image file is a tagged image file; the file contains both an image (most of the time) and a collection of data about the image. The data in a DICOM image file is stored as a sequence of individual elements. Each element contains one item of information about the image or the image itself. ...

Installing Heroku Scheduler heroku addons:create scheduler:standard

Here's a basic example of how to do a very simple class system Class = {} local __instance = {__index=Class} -- Metatable for instances function Class.new() local instance = {} setmetatable(instance, __instance) return instance -- equivalent to: return setmetatable({}, __instance)...

Having local Class = {} Class.__meta = {__index=Class} function Class.new() return setmetatable({}, Class.__meta) Assuming we want to change the behavior of a single instance object = Class.new() using a metatable, there are a few mistakes to avoid: setmetatable(object, {__call = table.conca...

The prototype pattern can be implemented using the ICloneable interface in .NET. class Spoon { } class DessertSpoon : Spoon, ICloneable { ... public object Clone() { return this.MemberwiseClone(); } } class SoupSpoon : Spoon, ICloneable { ... public object Clone() { ret...

The following code illustrates how to make 'hello world' app in kivy.To run this app in ios and android save it as main.py and use buildozer. from kivy.app import App from kivy.uix.label import Label from kivy.lang import Builder Builder.load_string(''' <SimpleLabel>: text: 'Hello ...

Objective C AVSpeechSynthesizer *synthesizer = [[AVSpeechSynthesizer alloc]init]; AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:@"Some text"]; [utterance setRate:0.2f]; [synthesizer speakUtterance:utterance]; Swift let synthesizer = AVSpeechSynthesizer...

The Search API provides access to recent tweets*. This is as opposed to the Stream API, which provides search results in real-time. <example> *Note that "the Search API is focused on relevance and not completeness" - Twitter Search API

The Stream API provides access to tweets in real-time. Streams can be filtered based on keywords, language, location, and more. Here's a simple example to track mentions of the word "tweepy": #set up a new class using tweepy.StreamListener class SimpleListener(tweepy.StreamListener): ...

@Component({ selector: 'main-component', template: '<example-component *ngFor="let hero of heroes" [hero]="hero"></example-component>' }) @Component({ selector: 'example-component', t...

app.module.ts import {routes} from "./app.routes"; @NgModule({ declarations: [AppComponent], imports: [BrowserModule, mainModule.forRoot(), RouterModule.forRoot(routes)], providers: [], bootstrap: [AppComponent] }) export class AppModule { } app.routes.t...

There are 2 ways to set formBuilder controls parameters. On initialize: exampleForm : FormGroup; constructor(fb: FormBuilder){ this.exampleForm = fb.group({ name : new FormControl({value: 'default name'}, Validators.compose([Validators.required, Validators.maxLength(15)])) }); ...

Inside of your {CATALINA_HOME}/conf/ folder exists a server.xml and context.xml file. Each one of these contains similar code, but references different parts of Tomcat to complete the same task. server.xml is server-wide configuration. This is where you can set up HTTPS, HTTP2, JNDI Resources, etc....

public void test() { Connection conn = null; Statement stmt = null; try { Context ctx = (Context) new InitialContext().lookup("java:comp/env"); conn = ((DataSource) ctx.lookup("jdbc/SomeDataSource")).getConnection(); stmt = conn.createS...

The following is an example of a simple and minimal college database that uses two-way relationships { "students": { "-SL3Cs0KFvDMQLIYZEzv": { "name": "Godric Gryffindor", "id": "900130309", "courses"...

Let's consider the below snippet, Get-ChildItem -Path C:\MyFolder | Select-Object Name, CreationTime, Length It simply output the folder content with the selected properties. Something like, What if I want to display the file size in KB ? This is where calcualted properties comes handy. Get-...

Unlike functions, there's no need to forward declare a procedure. It can be placed anywhere in your code, before or after you call it using RUN. RUN proc. //Procedure starts here PROCEDURE proc: //Procedure ends here END PROCEDURE. The procedure name is folowed by a colon sign telling u...

A procedure can have parameters of different kinds: input, output, input-output (bidirectional) and also some special types like temp-tables and datasets). In the run statement it's optional to declare INPUT (it's considered default) - all other directions must be specifically declared. A procedur...