Apps

• WhatsApp has per-conversation member tags(Jun 15)

Chrome

• cmd + 9 to select last tab(Jun 19)
• Take a full-page browser screenshot(May 12)

Git

• Sort branches by last commit date(Aug 24)
• git checkout - for last branch(Jun 10)
• Find my own commits(May 19)

iOS

• Use "Invisible Ink" for spoilers in iMessage(May 19)

Javascript

• Number.MAX_SAFE_INTEGER is 2**53 - 1(Jul 3)

macOS

• Show the application switcher on all screens(Aug 20)
• Spotlight can do math and unit conversions(Jul 30)
• cmd + shift + G to Go To Folder(Jul 21)
• cmd + option + L to navigate to Downloads(Jun 22)
• cmd + tab has a bunch of extras(Jun 12)
• Use open to open in other applications(Jun 3)
• cmd + shift + 5 is the final screenshot command(May 22)

Misc

• main, figure, article and other HTML tags(Sep 1)
• Mojibake(Aug 3)
• badssl.com lets you test bad certificates(Jul 17)
• 8b/10b encoding(Jun 29)

Ruby

• Pathname for file operations(Jul 1)

Shell

• pkill to stop a process by name(Jul 27)
• Use process substitution to tag stdout and stderr(Jun 24)
• Change the timezone for a command with TZ(Jun 17)
• tee to see output and save it(Jun 1)

SQL

• box, qbox modes for sqlite3(Jun 8)
• Window functions(May 25)

Text

• Find shared lines with comm(Jul 14)
• Reorder columns, print the last with awk(Jul 9)
• Pretty-print column-based data with column -t(May 30)

Tools

• magic-wormhole to send files(Sep 17)
• Control less options globally with LESS(Aug 17)
• less lets you toggle startup flags interactively(Aug 10)
• brew bundle and Homebrew Casks replaced my bespoke scripts(Jun 26)
• cal for a command-line calendar(Jun 5)
• termgraph for CLI charts(May 16)
• oxipng and pngquant to compress PNGs(May 14)
• tldr for simpler, example-driven help(May 13)

TypeScript

• Table names and indexed access types(May 29)