@mjfrigaard – posts

Python Apps

Launching Python Applications from VS Code

python

vscode

This is the second post on working in VS Code with Python. I’ll cover developing and publishing Python applications using Bokeh, Streamlit, and Dash.

VS Code, meet Quarto.

Quarto, say ‘hello’ to Python.

quarto

python

vscode

I’ve been using VS Code to write more and more Python code lately, so I’ve decided make some notes on 1) installing Python, 2) working in VS Code, and 3) using Python code…

Shiny system tests with `shinytest2`

Part 4: writing efficient system tests

shiny

testing

This post has been shortened from the original version. I felt it was too long and duplicative of other resources written better elsewhere. If you’d like to read the…

Testing Shiny modules

Part 3: module server functions and testServer()

shiny

testing

This is the third post in a series on testing shiny applications. I’ll cover testing shiny module server functions using the testhat package and shiny’s testServer() function.

Debugging in RStudio

Developing code with browser()

code

debugging

In this post I’ll cover using the browser() function with RStudio’s debugger. RStudio’s debugging tools are built into the IDE, which provides a seamless transition between…

Testing Non-Package Shiny Apps

Part 2: Using testthat with Shiny outside of a package

shiny

testing

This is the second post in a series on testing Shiny applications. I’ll cover testing Shiny module server functions using the testhat package outside of an R package…

Behavior Driven Unit Tests

Part 1: testthat’s BDD testing functions

shiny

testing

This post is the first in a series on testing Shiny applications. We’ll cover developing and testing a set of utility functions for a Shiny app-package using testhat. If…

Writing modular code with `box`

packages

code

box provides a precise and concise method for using add-on packages and functions. box also doesn’t require bundling your code into R packages to make it reusable. This post…

purrr updates (v1.0.0)

iteration

code

This post is going to cover the recent updates to the purrr package. The release of version 1.0.0 (and dev version v1.0.1) had some breaking changes, which I will cover…