Tutorial by Examples: l

To get data from testcollection collection in testdb database where name=dev import org.bson.Document; import com.mongodb.BasicDBObject; import com.mongodb.MongoClient; import com.mongodb.ServerAddress; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoCursor; import c...

This example adds a new parameter to MyTestFunction if $SomeUsefulNumber is greater than 5. function MyTestFunction { [CmdletBinding(DefaultParameterSetName='DefaultConfiguration')] Param ( [Parameter(Mandatory=$true)][int]$SomeUsefulNumber ) DynamicParam {...

File.Move In order to move a file from one location to another, one simple line of code can achieve this: File.Move(@"C:\TemporaryFile.txt", @"C:\TemporaryFiles\TemporaryFile.txt"); However, there are many things that could go wrong with this simple operation. For instance, wh...

Add the necessary dependencies to the project POM (mybatis, and mybatis-spring): <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>x.x.x</version> </dependency> <dependency> <group...

The leader key could be used as a way to create a mapping with a key-binding that can be overridden by the end user. The leader is the \ key by default. In order to override it, the end-user would have to execute :let g:mapleader='somekey(s)' before defining the mapping. In a typical scenario, the...

A1:A4 have A,B,C,D. B1 have the following formula: =ARRAYFORMULA({A1:A4,ROW(A1:A4)}) Result ABC1AA12BB23CC34DD4

// Main frame class declaration class CMainFrame : public CMDIFrameWndEx { DECLARE_DYNAMIC(CMainFrame) protected: // declare our pane CDockablePane m_wndPane; // .... other class memebers public: CMainFrame(); protected: afx_msg int OnCreate(LPCREATEST...

wxPython Classic is a Python 2 build of the wxPython library. Generation of the python bindings require a large number of manual interventions and the documentation is simply the wxWidgets documentation which contains some annotations on wxPython mechanisms as such there is normally a delay of weeks...

Identify the local scanner By using lsusb, identify the productId (1909 here) : pi:# lsusb pi:# Bus 001 Device 005: ID 04a9:1909 Canon, Inc. CanoScan LiDE 110 With that productId, grep the correct configuration file (it depends of your scanner model, for me it is genesys.conf) : pi:# grep 190...

The print elements of Bootstrap allow you to designate which items should be visible when printed and which should be hidden. To make something visible use either of the following depending on the element and how it should appear when printed: .visible-print-block .visible-print-inline .visible-...

Some times application must have panes that docked not to the main frame, but to the child frame. Usually it's MDI application. In MFC Feature pack such child frame is inherited from CMDIChildWndEx class and as main frame (inherited from CMDIFrameWndEx) have all required code for such docking. But ...

To write a new .zip file: System.IO.Compression System.IO.Compression.FileSystem using (FileStream zipToOpen = new FileStream(@"C:\temp", FileMode.Open)) { using (ZipArchive archive = new ZipArchive(zipToOpen, ZipArchiveMode.Update)) { ZipArchiveEntry readmeEntry...

A ThreadPool is an ExecutorService that executes each submitted task using one of possibly several pooled threads, normally configured using Executors factory methods. Here is a basic code to initialize a new ThreadPool as a singleton to use in your app: public final class ThreadPool { priv...

One of the features that we can use with Threadpools is the submit() method which allow us to know when the thread as finish his work. We can do this thanks to the Future object, which return us an object from the Callable that we can use to our own objetives. Here is an example about how to use th...

Another good practice to check when our threads have finished without block the thread waiting to recover the Future object from our Callable is to create our own implemetation for Runnables, using it together with the execute() method. In the next example, I show a custom class which implements Ru...

@Test annotation can be applied to any class or method. This annotation marks a class or a method as part of the test. @Test at method level - mark annotated method as test method @Test at class level The effect of a class level @Test annotation is to make all the public methods of the class ...

A simple way to create a Hello World program: import wx app = wx.App(redirect=False) frame = wx.Frame(parent=None, id=wx.ID_ANY, title='Hello World') frame.Show() app.MainLoop() Output: A more typical example would be to subclass wx.Frame: import wx class MyFrame(wx.Frame): def...

Clustered column store index can be rebuilt if you have a lot of deleted rows: ALTER INDEX cci ON Products REBUILD PARTITION = ALL Rebuilding CLUSTERED COLUMNSTORE will "reload" data from the current table into new one and apply compression again, remove deleted rows, etc. You can re...

Is good practice to resist the temptation of doing the delete action in the get request. It would be a huge security error, it has to be done always in the post method. // GET: Student/Delete/5 public ActionResult Delete(int? id) { // it good practice to consider that things...

Sometimes, it can be useful to import functions and structs relatively without having to use something with its absolute path in your project. To achieve this, you can use the module super, like so: fn x() -> u8 { 5 } mod example { use super::x; fn foo() { println!(...