Tutorial by Examples: w

The basic syntax of find() method with projection is as follows > db.COLLECTION_NAME.find({},{KEY:1}); If you want to show all documents without the age field then the command is as follows db.people.find({},{age : 0}); If you want to show all documents the age field then the command is a...

In MongoDB, projection means selecting only the necessary data rather than selecting whole of the data of a document. The basic syntax of find() method with projection is as follows > db.COLLECTION_NAME.find({},{KEY:1}); If you want to to show all document without the age field then the comm...

Using sequence function you can easily describe a message that calls a list of other messages. It's useful when dealing with semantics of your messages. Example 1: You are making a game engine, and you need to refresh the screen on every frame. module Video exposing (..) type Message = module Vid...

When using the .get() method whatever is in the entry widget will be converted into a string. For example, regardless of the type of input(It can be a number or sentence), the resulting outcome will be a string. If the user types 4 the output will be "4" as in a string. To get an int from ...

The andThen function allows update call composition. Can be used with the pipeline operator (|>) to chain updates. Example: You are making a document editor, and you want that each modification message you send to your document, you also save it: import Update.Extra exposing (andThen) import U...

void C++ When used as a function return type, the void keyword specifies that the function does not return a value. When used for a function's parameter list, void specifies that the function takes no parameters. When used in the declaration of a pointer, void specifies that the pointer is ...

var config = {}; var timeout = 120000; config.framework = 'jasmine2'; config.allScriptsTimeout = timeout; config.getPageTimeout = timeout; config.jasmineNodeOpts.isVerbose = true; config.jasmineNodeOpts.defaultTimeoutInterval = timeout; config.specs = ['qa/**/*Spec.js']; config.capabilitie...

#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...

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...

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

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...

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 ...

Dim lo as ListObject Dim lr as ListRow Dim lc as ListColumn Set lr = lo.ListRows.Add Set lr = lo.ListRows(5) For Each lr in lo.ListRows lr.Range.ClearContents lr.Range(1, lo.ListColumns("Some Column").Index).Value = 8 Next Set lc = lo.ListColumns.Add Set lc = lo.Lis...

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...

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...

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 ...

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...

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...

Swift: let services = [CBUUID(string: SERVICE1_UUID), CBUUID(string: SERVICE2_UUID)] centralManager.scanForPeripherals(withServices: services, options: nil) Objective C: NSArray *services = @[[CBUUID UUIDWithString:SERVICE1_UUID], [CBUUID UUIDWithString:SERVICE2_UUID]]; [centralManager scanFo...

Swift: var centralManager:CBCentralManager! centralManager = CBCentralManager(delegate: self, queue: nil, options: [CBCentralManagerOptionRestoreIdentifierKey : "com.companyname.appname.central"]) Objective C: @property (nonatomic, strong) CBCentralManager *centralManager; self....