http://www.jackxiang.com/index.php zh-cn http://www.jackxiang.com/post// jack <xdy108@126.com> Tue, 18 Sep 2018 13:57:37 +0000 http://www.jackxiang.com/post// declare -A DATABASES

# mail
DATABASES['10.70.62.5-3306']='postfix_mail'
用unset来撤销数组，可用unset array_name[i]来删除里面的元素
#cat  arrayunset.sh  
#!/bin/bash declare -A DATABASES # mail DATABASES['10.70.62.5-3306']='postfix_mail' # bai DATABASES['10.71.183.106-3306']='bai manage' echo echo ${DATABASES[@]}   #打印所有数组
#sh  arrayunset.sh
echo bai manage postfix_mail



一）${#array_name[@]} 或者 ${#array_name[*]}都可以用来求数组的长度
#cat ping3times.sh  
#!/bin/bash IP_LIST="192.168.18.1 192.168.1.1 192.168.18.2" for IP in $IP_LIST; do    NUM=1    while [ $NUM -le 3 ]; do       if ping -c 1 $IP > /dev/null; then          echo "$IP Ping is successful."           break;       else            FAIL_COUNT[$NUM]=$IP            let NUM++       fi    done    if [ ${#FAIL_COUNT[*]} -eq 3 ];then        echo "${FAIL_COUNT[1]} Ping is failure!"    fi done


#cat  arrayloop.sh   #!/bin/bash names=(jerry alice david wendy) for ((i=0;i<${#names[*]};i++)) do      echo ${names[$i]} done


#sh  arrayloop.sh
jerry
alice
david
wendy


二）${array_name[@]} 或者 ${array_name[*]} 都可以全部显示数组中的元素
#cat arraylist.sh #!/bin/bash names=(jerry alice david wendy) for ((i=0;i<${#names[*]};i++)) do      echo ${names[$i]} done echo ${names[@]}

#sh arraylist.sh
jerry
alice
david
wendy
jerry alice david wendy


来自：https://blog.csdn.net/Jerry_1126/article/details/52027539 ]]> http://www.jackxiang.com/post//#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://www.jackxiang.com/post//#blogcomment