#!/bin/bash

# =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~
# Experimenting with backreferences in Bash regular expressions
# =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~ =~

re='(\<.{1,10}\>) \1'

if [[ $1 =~ $re ]]; then
    echo "Matched: $1"
else
    echo "No match: $1"
fi