examples

My Android AsyncTask docs and examples (parameters, callbacks, executing, canceling)

I’ve currently written this document as a “note to self” about how the Android AsyncTask works. It’s currently incomplete, but if you want to know how an AsyncTask works, most of the answers are generally here. I provide documentation for most aspects of the AsyncTask, though my coverage of (a) updating progress/status and (b) canceling an AsyncTask is a little weak atm.

Android Room database persistence library examples alvin July 20, 2017 - 12:02pm

As a note to self, here are some Android Room database persistence library examples:

Those tutorials don’t show how to properly use Room database access methods, so they’ll lead to Android “Application Not Responding” (ANR) errors. Therefore, here are some related Google/Android docs:

Finally, here’s my own Android AsyncTask REST example, which also shows how to use an AsyncTask.

Simple iTunes AppleScript script examples

If you’ve never used AppleScript, here are two iTunes AppleScript examples to get you going. First, This one tells iTunes to play the playlist named “My Favorites”:

tell application "iTunes"
    play playlist "My Favorites"
end tell

That script starts playing a random song from that playlist. If you want to start by playing the first song of that playlist, this script will do the trick:

A gallery of 130+ Gimp filters/effects

There are times when I work on images a lot with Gimp, and then there are times when I don’t work with Gimp for a month or two. When I don’t work with Gimp a lot, I tend to forget about all of the different things I can do with. Therefore, I have created this page as a “Gimp special effects cheat sheet” page to help remind me of all the cool things I can do with Gimp effects.

An introduction to Scala Types (from the Scala Cookbook)

This is an excerpt from the Scala Cookbook (partially modified for the internet). This is the introduction to Chapter 19, Types.

As you can tell from one look at the Scaladoc for the collections classes, Scala has a powerful type system. However, unless you’re the creator of a library, you can go a long way in Scala without having to go too far down into the depths of Scala types. But once you start creating collections-style APIs for other users, you will need to learn them.

Scala number, date, and formatting examples

This short blog post contains a collection of Scala number and date examples. I created most of these in the process of writing the Scala Cookbook. Unlike the Cookbook, I don’t describe the examples here much at all, I just show the examples, mostly as a reference for myself (and anyone else that can benefit from them).

Scala numeric types

Scala has these numeric types:

Methods on the Scala collections classes, organized by category

When I wrote the Scala Cookbook, I gave each recipe and then each chapter my full attention. I thought that if I wrote each recipe as well as possible, and included important recipes in each chapter, well, I wanted each chapter to be worth the price of the entire book. That was my goal.

As a result of this effort -- and perhaps to the chagrin of my editor -- the Scala collections chapters ended up being 130 pages in length.