dimo414

Expanding Bash arrays safely with set -u

Prior to Bash 4.4 set -u treated empty arrays as "unset", and terminates the process. There are a number of possible workarounds using array parameter expansion, however almost all of them fail in certain Bash versions.

This gist is a supplement to this StackOverflow post.

timvisee

As posted on: https://timvisee.com/blog/list-export-your-subreddits/

Get a list of your subreddits

To obtain a list of your subreddits, do the following:

• First make sure you're logged in on reddit, on a desktop browser.
• Then visit reddit.com/subreddits.
• Then put the following snippet in your browsers address bar, and press Enter.
  Make sure javascript: is included at the beginning, your browser might remove it while copy-pasting for security reasons:

egmontkob

Hyperlinks (a.k.a. HTML-like anchors) in terminal emulators

[ Update 2020-05-31: I won't be maintaining this page or responding to comments anymore (except for perhaps a few exceptional occasions). ]

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Most of the terminal emulators auto-detect when a URL appears onscreen and allow to conveniently open them (e.g. via Ctrl+click or Cmd+click, or the right click menu).

It was, however, not possible until now for arbitrary text to point to URLs, just as on webpages.

RichardBronosky

#!/usr/bin/env bash
# tputdemo.sh

echo -e "\n$(tput bold) reg  dim  bld  und   tput-command$(tput sgr0)"
for i in $(seq 0 15); do
  for k in sgr0 dim bold smul; do
    echo -n " $(tput $k)$(tput setaf $i)Text$(tput sgr0)"
  done
  echo    "  \$(tput setaf $i)"
done

earthgecko

#!/bin/bash
# bash generate random alphanumeric string
#

# bash generate random 32 character alphanumeric string (upper and lowercase) and 
NEW_UUID=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 32 | head -n 1)

# bash generate random 32 character alphanumeric string (lowercase only)
cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 32 | head -n 1