Tutorial by Examples: e

Bit Manipulation Application: Small to Capital Letter

One of several applications of bit manipulation is converting a letter from small to capital or vice versa by choosing a mask and a proper bit operation. For example, the a letter has this binary representation 01(1)00001 while its capital counterpart has 01(0)00001. They differ solely in the bit in...

C++ • Bit Manipulation

Drawing Shapes Sample

#include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc.hpp> // drawing shapes #include <iostream> int main( int argc, char** argv ) { // First create a black image. cv::Mat image(500,500, CV_8UC3, cv::Scalar(0,0,0...

opencv • Drawing Shapes (Line, Circle, ..., etc) in C++

Installation or Setup

Create a file called hello.html with the following content: <!doctype html> <html> <head> <script src="//cdnjs.cloudflare.com/ajax/libs/dygraph/2.0.0/dygraph.js"></script> <link rel="stylesheet" href="https://cdnjs.cloudflare.com...

dygraphs • Getting started with dygraphs

RecycleView

from kivy.app import App from kivy.lang import Builder from kivy.uix.button import Button items = [ {"color":(1, 1, 1, 1), "font_size": "20sp", "text": "white", "input_data": ["some","random","data&q...

kivy • Getting started with kivy

Using CacheAttached to Override DAC Attributes in the Graph

Sometimes, you need to override one or more attributes of a particular Data Access Class (DAC) field just for a particular screen, without changing the existing behavior for other screens. Replacing All Attributes Suppose the original DAC field attributes are declared as shown below: public class...

acumatica • Customization Mechanisms

Deployment using PM2 without downtime.

ecosystem.json { "name": "app-name", "script": "server", "exec_mode": "cluster", "instances": 0, "wait_ready": true "listen_timeout": 10000, "kill_timeout": 500...

Node.js • Deploying Node.js application without downtime.

Define custom exception, raise it and see where it comes from

To illustrate this, here is a function that has 3 different "wrong" behaviors the parameter is completely stupid: we use a user-defined expression the parameter has a typo: we use Oracle standard NO_DATA_FOUND error another, but not handled case Feel free to adapt it to your standa...

plsql • Exception Handling

Handling connexion error exceptions

Each standard Oracle error is associated with an error number. It's important to anticipate what could go wrong in your code. Here for a connection to another database, it can be: -28000 account is locked -28001 password expired -28002 grace period -1017 wrong user / password Here is a way ...

plsql • Exception Handling

Lightweight

Vim is (like GNU Nano or GNU emacs) lightweight. It does not need any kind of graphical interface (like x11, wayland &co). This makes vim to a system maintainers best friend. You can use it using ssh and, this is really important, on really small devices that do not have some kind of graphical ...

vim • Advantages of vim

Usage of .GIF formats.

In order to display a gif, you need to show it frame by frame sort of like an animation. An animated gif consists of a number of frames in a single file. Tk loads the first frame but you can specify different frames by passing an index parameter when creating the image. For example: frame2 = Photo...

tkinter • Adding Images To Label/Button

Instantiating a ListObject

Dim lo as ListObject Dim MyRange as Range Set lo = Sheet1.ListObjects(1) 'or Set lo = Sheet1.ListObjects("Table1") 'or Set lo = MyRange.ListObject

excel-vba • Working with Excel Tables in VBA

Converting an Excel Table to a normal range

Dim lo as ListObject Set lo = Sheet1.ListObjects("Table1") lo.Unlist

excel-vba • Working with Excel Tables in VBA

Un-registering events or listeners

You can un-register individual events, entire listener classes or all events registered by your plugin or even by other plugins! Un-register specific event Each event class has the getHandlerList() static method, call that and then you can use .unregister() method. PlayerInteractEvent.getHandlerL...

minecraft • Event Listeners in Bukkit

RecyclerView with Click events

This example shows how to set Click EventHandlers in a Xamarin.Android RecyclerView. In Android Java, the way to set up a listener for a Click is using a onClickListener for the view that will be clicked, like this: ImageView picture = findViewById(R.id.item_picture); picture.setOnClickListener(n...

Xamarin.Android • RecyclerView

Creating an AdhocWorkspace and adding a new project and a file to it.

The idea behind the AdhocWorkspace is to create a workspace on the fly. var workspace = new AdhocWorkspace(); string projectName = "HelloWorldProject"; ProjectId projectId = ProjectId.CreateNewId(); VersionStamp versionStamp = VersionStamp.Create(); ProjectInfo helloWorldProject = P...

roslyn • Using Workspaces

Creating an MSBuildWorspace, loading a solution and getting all the documents in all that solution

The MSBuildWorspace is built around the concept of handling MSBuild solutions (.sln files) and their respective projects (.csproj, .vbproj). Adding new projects and documents to this workspace is not supported. string solutionPath = @"C:\Path\To\Solution\Sample.sln"; MSBuildWorkspace ...

roslyn • Using Workspaces

Getting the VisualStudioWorkspace from inside a Visual Studio Extension

In contrast to the other types of workspaces, the VisualStudioWorkspace, cannot be created manually. It can be accessed when building a Visual Studio extension. When inside your extension package project, go to [YourVSPackage]Package.cs file. There you can acquire the workspace in two ways: protec...

roslyn • Using Workspaces

Creating our project.

We're good to go so, we run, again from console: mkdir our_project cd our_project Now we're in the place where our code will live. To create the main archive of our project you can run Ok, but how we create the express skeleton project? It's simple: npm install -g express express-generator ...

Node.js • Node.js (express.js) with angular.js Sample code

Submit the WFFM form programmatically

This example shows how to submit the WFFM form in code. var controlResults = new List<ControlResult>(); controlResults.Add(new ControlResult(Pdf_Request_Form.Name.ItemID.ToString(), "Name", name, string.Empty)); controlResults.Add(new ControlResult(Pdf_Request_Form.Email.ItemID.To...

sitecore • Web Forms For Marketeers (WFFM)

Scan all available peripherals

Swift: centralManager.scanForPeripherals(withServices: nil, options: nil) Objective C: [centralManager scanForPeripheralsWithServices:nil options:nil];

core-bluetooth • Scan & connect with BLE peripherals (Bluetooth Smart)