breiter

#!/bin/sh

#kill bluetoothd to reset bluetooth wonkiness in macOS
#catalina, big sur, monterey
#fixes continuity, magic keyboard mismapping of function keys, magic mouse scrolling

current_userid=$(id -u)
if [ $current_userid -ne 0 ]; then
    echo "$(basename "$0") requires superuser privileges to run" >&2
    echo "try: \033[1;36msudo $(basename "$0")" >&2

roalcantara

## TL;DR

setopt extendedglob
ls *(<tab>                                                    # to get help regarding globbing
rm ../debianpackage(.)                                        # remove files only
ls -d *(/)                                                    # list directories only
ls /etc/*(@)                                                  # list symlinks only
ls -l *.(png|jpg|gif)                                         # list pictures only
ls *(*)                                                       # list executables only
ls /etc/**/zsh                                                # which directories contain 'zsh'?

jackrusher

Hofstadter on Lisp

In the mid-80s, while reading through my roommate's collection of Scientific American back issues, I encountered this introduction to Lisp written by Douglas Hofstadter. I found it very charming at the time, and provide it here (somewhat illegally) for the edification of a new generation of Lispers.

In a testament to the timelessness of Lisp, you can still run all the examples below in emacs if you install these aliases:

(defalias 'plus #'+)
(defalias 'quotient #'/)
(defalias 'times #'*)
(defalias 'difference #'-)