Hello, my name is DJ and this is 'autodidactics', a lightweight blog where I write about bits and pieces that I pick up from content created by other folks - in particular small things that I learn from studying the code they write. Find out more about me and the content I create over on my home website.

Latest Post

Producing JSON with jq for appending issue titles (13 Apr)

I learned how to use jq to produce JSON, while writing a script to enhance my Thinking Aloud journal entry titles.

Archive

2021

New tmux panes and windows in the right directory (1 Apr)

Two-phase video uploads with YouTube API and curl (30 Mar)

Mass deletion of GitHub Actions workflow runs (26 Mar)

Aborting a script with parameter expansion (15 Mar)

fzf - the basics part 2 - search results (7 Feb)

fzf - the basics part 1 - layout (2 Feb)

2020

Waiting for jobs, and the concept of the shell (28 Dec)

Implicit values in Bash for loop construct (3 Dec)

Case modification operators in parameter substitution (16 Oct)

MID$ and shell parameter expansion (11 Oct)

Understanding declare (8 Oct)

Desnowballification with set -o errexit (6 Oct)

Checking a command is available before use (4 Oct)

curl and multipart/form-data (4 Oct)

Using exec to jump (3 Oct)

Shell parameter expansion with :+ is useful (27 Sep)

You can mask sensitive hostnames with wildcards and host aliases (25 Aug)

The open square bracket [ is an executable (21 Aug)

Why we have /bin/ and /usr/bin/ (16 Aug)

String.prototype.replace() can take a function (4 Aug)

continue-on-error can prevent a job step failure causing an action failure (21 Jul)

In an mta.yaml file you can use the service-name parameter to point to an existing resource (20 Jul)

git diff can emit different exit codes (20 Jul)