Tutorial by Examples: r

$command = 'Get-ChildItem' & $Command Will execute Get-ChildItem

. .\myScript.ps1 runs .\myScript.ps1 in the current scope making any functions, and variable available in the current scope.

Format: cd/ cd/ is set to change the current directory back to the root of the current drive

Hello friends before start code we have need to declare dependency for access firebase ui component, so here is the dependency which you can put it in your gradel other wise you can add dependency as jar also. compile 'com.firebaseui:firebase-ui-database:0.4.0' Then after we are querying in fire...

StackOverflow forces me to have one example. If this topic is approved, we should move this example here.

First, let's create a template to be rendered! p Hello World, #{name}! Save this in a file ending with the .pug extension (you can call it anything you like, but we will use view.pug in the following code to compile it). All that's left to do, now, is compile that template! Create a JS script f...

First Add Storage permission to read/fetch device directory. <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> Create model class //create one directory model ...

It internally creates a ReplaySubject and makes it multicast compatible. The minimal replay value of ReplaySubject is 1 emission. This results in the following: First subscription will trigger the publishReplay(1) to internally subscribe to the source stream and pipe all emissions through the Rep...

Detailed instructions on getting spark-dataframe set up or installed.

//check if there is actually a file being uploaded if (FileUpload1.HasFile) { //load the uploaded file into the memorystream using (MemoryStream stream = new MemoryStream(FileUpload1.FileBytes)) using (ExcelPackage excelPackage = new ExcelPackage(stream)) { //loop all ...

public static DataTable ExcelPackageToDataTable(ExcelPackage excelPackage) { DataTable dt = new DataTable(); ExcelWorksheet worksheet = excelPackage.Workbook.Worksheets[1]; //check if the worksheet is completely empty if (worksheet.Dimension == null) { return dt;...

This is an example of an attribute that I created to validate that required parameters have been assigned in the request object receive in a POST route. I decided on this approach because the standard ModelState.IsValid approach was not valid. This is because the required attributes vary based on wh...

[HttpPost] [Route("api/Fitbit/Activity/Stats")] public async Task<HttpResponseMessage> ActivityStats(FitbitRequestDTO request) { if (string.IsNullOrEmpty(request.PatientId) || string.IsNullOrEmpty(request.DeviceId)) ret...

public async Task<HttpResponseMessage> ActivityStats(FitbitRequestDTO request) { try { var tokenErrorResponse = await EnsureToken(request); if (tokenErrorResponse != null) return tokenErrorRespons...

In LR Classifier, he probabilities describing the possible outcomes of a single trial are modeled using a logistic function. It is implemented in the linear_model library from sklearn.linear_model import LogisticRegression The sklearn LR implementation can fit binary, One-vs- Rest, or multinomia...

New Java programmers often forget, or fail to fully comprehend, that the Java String class is immutable. This leads to problems like the one in the following example: public class Shout { public static void main(String[] args) { for (String s : args) { s.toUpperCase(); ...

Apache Kafka™ is a distributed streaming platform. Which means 1-It lets you publish and subscribe to streams of records. In this respect it is similar to a message queue or enterprise messaging system. 2-It lets you store streams of records in a fault-tolerant way. 3-It lets you process streams...

K-fold cross-validation is a systematic process for repeating the train/test split procedure multiple times, in order to reduce the variance associated with a single trial of train/test split. You essentially split the entire dataset into K equal size "folds", and each fold is used once fo...

This tool lets you produce messages from the command-line. Send simple string messages to a topic: kafka-console-producer --broker-list localhost:9092 --topic test here is a message here is another message ^D (each new line is a new message, type ctrl+D or ctrl+C to stop) Send messages with...

This tool let's you consume messages from a topic. to use the old consumer implementation, replace --bootstrap-server with --zookeeper. Display simple messages: kafka-console-consumer --bootstrap-server localhost:9092 --topic test Consume old messages: In order to see older messages, you...