Keath Milligan

On software development, quality, security and broken racecars

Category: Development (page 1 of 2)

Create a reusable chart component with Angular and D3.js

Integrating D3.js with Angular to create reusable chart components. This is an updated version of the original post that covered integrating D3.js (version 4) with Angular 2. This version covers the latest Angular version (currently 4.2.4).

Implement a RESTful interface with Android Things and Raspberry Pi

Android Things (formerly “Brillo”) is a streamlined version of Android designed for small form-factor and IoT devices. Here is a simple example of a Things app that provides a RESTful web interface to control the state of an LED on a Raspberry Pi GPIO port.

Lazy-loading content with angular-cli

A quick example of creating a lazy-loaded module with angular-cli.

Create reusable chart components with Angular 2 and D3.js version 4

angular2-d3v4

Integrate D3.js (version 4) with the Angular 2 component life cycle to create reusable charts and other visualizations that support animation and dynamic data.

Using Auth0 with Angular 2 and angular-cli

angular2Auth0‘s standard Angular 2 quick-start uses SystemJS and loads the Auth0 Javascript files globally from index.html. That’s fine for demo purposes, but not ideal for production. I’ve created a github repo (and some additional notes in this gist) that demonstrates using Auth0 with an Angular 2 app generated with angular-cli. This example loads Auth0 as modules and lets Webpack bundle it with the rest of your Javascript.

A “shrink-wrap” Python project template and development pattern

Javascript development certainly has its ups and downs, but one of the good things about its ecosystem is the ability to easily share projects and quickly get other developers up and running. With most projects, it is simply a matter of cloning the repo and running “npm install” and you are ready to go without needing anything else pre-installed on your system besides NodeJS/NPM. With python, it’s usually not quite that simple.

Python, LDAP and macOS

The Python LDAP packages (python-ldap and pyldap) mostly work on macOS, but if you try to use some options and APIs, you will run into trouble. For example:

RESTful Flask application quick-start

flask-quickstart

 

With the rise of the single-page application (SPA) web front-ends and mobile apps, the backend of many web applications is a collection of RESTful interfaces that provide JSON data rather than generating HTML. The rendering is up to the client side. While there are some drawbacks to this approach (heavier client, slower initial page loads, etc.), there are also a number of advantages, not the least of which is better separation of concerns since the front-end and back-end code are completely independent of one another.… Read More...

Cmder tip: enable forward slash completion

Cmder includes better command-line tab completion – normally, paths will be completed using the default Windows path separator, the backslash (“\”). But Windows has recognized the forward slash (“/”) as an optional path separator for a while now and there are instances where this might be desirable, especially if you switch between Windows and Unix-like environments (macOS, Linux) often as I do.

 

Debugging pytest in VSCode (without adding files to your project)

Update July 29, 2017: updated to work on Windows and simplify configuration.

For debugging pytest executions, the official VSCode Python extension documentation recommends creating an additional file in your project, e.g.:

and setting up a launcher to start the debugger against it. While this is simple, I really don’t like having to modify my project’s code or add source files just to satisfy my editor/IDE.

So, to debug pytest without having to create an additional source file, setup a launcher configuration with the “program” option pointing to the “pytest” script itself, for instance:

In my case, I have a virtual environment setup in the root of the project (.virtualenv).… Read More...

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