Tutorial by Examples: e

Recursion is easy - RUN the procedure itself from inside the procedure. However if you recurse too far the stack will run out of space. A procedure calculation the factorial. PROCEDURE factorial: DEFINE INPUT PARAMETER piNum AS INTEGER NO-UNDO. DEFINE OUTPUT PARAMETER piFac AS INTEG...

The procedure has it's own scope. The outside scope will "bleed" into the procedure but not the other way arround. DEFINE VARIABLE i AS INTEGER NO-UNDO INIT 1. DEFINE VARIABLE j AS INTEGER NO-UNDO. PROCEDURE p: MESSAGE i VIEW-AS ALERT-BOX. // 1 MESSAGE j VIEW-AS AL...

Set createVBScriptRegExObject = CreateObject("vbscript.RegExp") Tools> References> Microsoft VBScript Regular Expressions #.# Associated DLL: VBScript.dll Source: Internet Explorer 1.0 and 5.5 MSDN-Microsoft Beefs Up VBScript with Regular Expressions MSDN-Regular Expression ...

Incorrect Code Sub DoSomething() GoSub DoThis DoThis: Debug.Print "Hi!" Return End Sub Why doesn't this work? Execution enters the DoSomething procedure, jumps to the DoThis label, prints "Hi!" to the debug output, returns to the instruction immediately afte...

Incorrect code Sub DoSomething() Dim row As Integer For row = 1 To 100000 'do stuff Next End Sub Why doesn't this work? The Integer data type is a 16-bit signed integer with a maximum value of 32,767; assigning it to anything larger than that will overflow the type and ...

Incorrect code Sub DoSomething() Dim foo(1 To 10) Dim i As Long For i = 1 To 100 foo(i) = i Next End Sub Why doesn't this work? foo is an array that contains 10 items. When the i loop counter reaches a value of 11, foo(i) is out of range. This error occurs whenever...

Incorrect code Public Sub DoSomething() DoSomethingElse "42?" End Sub Private Sub DoSomethingElse(foo As Date) ' Debug.Print MonthName(Month(foo)) End Sub Why doesn't this work? VBA is trying really hard to convert the "42?" argument into a Date value. When it ...

Incorrect code Sub DoSomething() Dim foo As Collection With foo .Add "ABC" .Add "XYZ" End With End Sub Why doesn't this work? Object variables hold a reference, and references need to be set using the Set keyword. This error occurs whenever ...

you can set a Jekyll environment and value, when build time JEKYLL_ENV=production jekyll b JEKYLL_ENV=production jekyll build JEKYLL_ENV=production bundle exec jekyll build if your code contains the bellow snippet, analytics.html will not be included unless your building with JEKYLL_ENV=...

The following code illustrates how to do simple popup with Kivy. from kivy.app import App from kivy.uix.popup import Popup from kivy.lang import Builder from kivy.uix.button import Button Builder.load_string(''' <SimpleButton>: on_press: self.fire_popup() <SimplePopup>: ...

To deploy Java code to AWS Lambda, you have to create a distribution zip file that contains all dependencies that are needed during the runtime. Example project in Gradle: apply plugin: 'java' repositories { mavenCentral() } dependencies { compile 'com.amazonaws:aws-lambda-java-cor...

A lambda needs a handler, which will serve as the entry point to your application. Every handler needs to implement interface RequestHandler<I, O> where I is the input type and O is the output type. The input type is then passed to the handleRequest() method and the method returns the output t...

A lambda needs a handler, which will serve as the entry point to your application. In the simplest case, you get your input from the context and pass the result using the callback() function: exports.handler = (event, context, callback) => { callback(null, 'You sent ' + event.number); };

To create a Java lambda using the GUI, first make sure you have your distribution zip ready. You will also need an AWS account that can create lambdas. Switch to the AWS Lambda, dismiss the introduction screen (or read the Get Started documentation) and press the button Create a Lambda Function. ...

If you have successfully deployed the Lambda, you can also test it directly in the GUI. When you click the blue Test button for the first time, it presents you with a creation of a new test event. If you are testing the Java code from the Basic Lambda code in Java example, delete the whole body and...

Probably the most common way to invoke a Lambda is to use API Gateway, which maps a REST call to the lambda code. You can add multiple triggers to your Lambda during at any time, including when creating a new lambda. If you are familiar with API Gateway, you can associate any method with a deployed...

@Grab(group='org.codehaus.groovy.modules.http-builder', module='http-builder', version='0.7' ) import groovyx.net.http.RESTClient try { def restClient = new RESTClient("http://weathers.co") def response = restClient.get(path: '/api.php', query: ['city': 'Prague']) prin...

The known sub-classes for Entity Events are: Sub-ClassesSub-ClassesSub-ClassesCreatureSpawnEventCreeperPowerEventEntityChangeBlockEventEntityCombustEventEntityCreatePortalEventEntityDamageEventEntityDeathEventEntityExplodeEventEntityInteractEventEntityPortalEnterEventEntityRegainHealthEventEntitySh...

UITabBarController building in Swift 3 Change image color and title according to selection with changing selected tab color. import UIKit class TabbarController: UITabBarController { override func viewDidLoad() { super.viewDidLoad() self.navigationController?.isNavigat...

Set createScriptingFileSystemObject = CreateObject("Scripting.FileSystemObject") Tools> References> Microsoft Scripting Runtime Associated DLL: ScrRun.dll Source: Windows OS MSDN-Accessing Files with FileSystemObject The File System Object (FSO) model provides an object-base...