Add num_circle script to transform a number into a digit with a circle.

README.md

@@ -8,6 +8,7 @@ Some useful scripts (for me) that can be added to $PATH :)
 * firewall: A script shell to set some iptables rules.
 * update-dynmotd.d/: scripts to update the motd (via the /etc/update-motd.d directory).
 * flac_to_mp3: convert all flac files of a directory into mp3.
+* num_circle: Transform a number into a digit with a circle.
 * pomodoro: Print a task and a timer in a file. Try to apply Pomodoro Technique!
 * snapsend.sh: Send a ZFS snapshot to a remote host.
 * test_ssl3: Test if a website supportes the SSLV3 protocol.
@@ -17,6 +18,12 @@ Some useful scripts (for me) that can be added to $PATH :)
 * zenity_generator: Script to generate zenity window.
 * zfSnap.sh: Take snapshot of a ZFS pool.
 
+### Num_circle
+Tiny Bash script that take a number between 0 and 20 as argument and transform it into a digit with into a circle.
+```sh
+num_circle 18
+⑱
+```
 
 ### Pomodoro
 My implementation of the Pomodoro Technique (https://en.wikipedia.org/wiki/Pomodoro_Technique).

num_circle

@@ -0,0 +1,11 @@
+#!/bin/bash
+circled_digit() {
+  circled_digits='⓪①②③④⑤⑥⑦⑧⑨⑩⑪⑫⑬⑭⑮⑯⑰⑱⑲⑳'
+  if [ $1 -lt 20 ] 2>/dev/null ; then
+    printf '%b' "${circled_digits:$1:1}\n"
+  else
+    printf '%b' "Must give a number between 0 and 20. Not '$1'\n"
+  fi
+}
+
+circled_digit $1