Tutorial by Examples: basics

The first standalone R script Standalone R scripts are not executed by the program R (R.exe under Windows), but by a program called Rscript (Rscript.exe), which is included in your R installation by default. To hint at this fact, standalone R scripts start with a special line called Shebang line, ...

You will need to install node.js - https://nodejs.org/en/ npm install -g @angular/cli - install the CLI by executing this command in the terminal ng new projectname - after executing this command in the terminal, you will create a new sub folder titled projectname in your current folder. cd pro...

MCVE's should start the Shiny app when they are copied in the console. An easy way to do this is using the shinyApp function. For example: why is my checkbox not responding? library(shiny) ui <- fluidPage( checkboxInput('checkbox', 'click me'), verbatimTextOutput('text') ) serv...

Data annotations are a way of adding more contextual information to classes or members of a class. There are three main categories of annotations: Validation Attributes: add validation criteria to data Display Attributes: specify how the data should be displayed to the user Modelling Attributes...

Locators by themselves do not return an element which can be interacted with in Protractor, they are simply instructions that indicate Protractor how to find the element. To access the element itself, use this syntax: element(locator); element.all(locator); Note: the element(s) is not actually...

To develop applications for iOS, you need to have a Mac, an Apple developer account (to publish to the App Store; costs $100 annually), the free XCode application on your Mac, and ideally some iOS devices to test with. Experience with either of the programming languages Swift or Objective-C is necc...