bash 下 hash array的支持

declare -A region_URLs
region_URLs[beijing]="https://1.com"
region_URLs[shanghai]="https://2.com"
region_URLs[Sydney]="https://3.com"


for site in "${!region_URLs[@]}"; do
        echo $site -- ${region_URLs[$site]}
done

root@219:~# bash test.sh
shanghai -- https://2.com
Sydney -- https://3.com
beijing -- https://1.com

References: http://www.artificialworlds.net/blog/2012/10/17/bash-associative-array-examples/