map

1.map

读文件放到map中：
https://blog.csdn.net/weixin_42651205/article/details/83624574
cat test.txt
000000000007a16000000088:0
000000000007a16000000089:0
000000000007a16300000087:0
000000000007a16800000088:0

-------------------------------------------------------------
#!/bin/bash  
str=(`cat ./test.txt | awk -F ' ' '{print $1}'`)
declare -A mymap;	#定义
for i in ${!str[@]}
do
	eval $(echo ${str[i]} | awk '{split($0, filearray, ":");print "mymap["filearray[1]"]="filearray[2]}')
done
#输出所有key值
echo ${!mymap[@]}

#输出所有value值
echo ${mymap[@]}

#遍历
for key in ${!mymap[@]}
do
	echo "${mymap[$key]}"
done

#查找和删除
findkey="keyx"
value="valuex"

# 查找
echo ${mymap[$findkey]}
#查找插入和删除，找到就删掉，没找到就插入
if [ ! -n "${mymap[$key]}" ]
then
	mymap[$findkey]=$value
else
	echo "find value"
	unset mymap[$findkey]
fi

2.map详解

在使用map时，需要先声明，否则结果可能与预期不同，array可以不声明
方式1：
[root@host102442549 Master]# cat 11.sh 
declare -A myMap
myMap["my03"]="03"
echo ${myMap[my03]}
[root@host102442549 Master]# sh 11.sh 
03

方式2：
[root@host102442549 Master]# cat 22.sh 
declare -A myMap=(["my01"]="01" ["my02"]="02")
myMap["my03"]="03"
myMap["my04"]="04"

echo ${myMap[my01]}
echo ${myMap[my02]}
echo ${myMap[my03]}
echo ${myMap[my04]}
[root@host102442549 Master]# sh 22.sh 
01
02
03
04

输出Map所有的key、value、长度：
# 1）输出所有的key
#若未使用declare声明map，则此处将输出0，与预期输出不符，此处输出语句格式比arry多了一个！
echo ${!myMap[@]}

#2）输出所有value
#与array输出格式相同
echo ${myMap[@]}

#3）输出map长度
#与array输出格式相同
echo ${#myMap[@]}

Map遍历：
#1)遍历，根据key找到对应的value
for key in ${!myMap[*]};do
  echo $key
  echo ${myMap[$key]}
done
#2)遍历所有的key
for key in ${!myMap[@]};do
  echo $key
  echo ${myMap[$key]}
done
#3)遍历所有的value
for val in ${myMap[@]};do
  echo $val
done


测试：
[root@cdh-143 shell-test]# more map-test.sh
#!/bin/sh

echo "一、定义Map:declare -A myMap=([\"myMap00\"]=\"00\" [\"myMap01\"]=\"01\")"
declare -A myMap=(["my00"]="00" ["my01"]="01")
myMap["my02"]="02"
myMap["my03"]="03"

echo "二、输出所有的key:"
echo ${!myMap[@]}

echo "三、输出所有value:"
echo ${myMap[@]}

echo "四、输出map的长度:"
echo ${#myMap[@]}

echo "五、遍历，根据key找到对应的value:"
for key in ${!myMap[*]};do
  echo "key:"$key
  echo "value:"${myMap[$key]}
done

echo "六、遍历所有的key:"
for key in ${!myMap[@]};do
  echo "key:"$key
  echo "value:"${myMap[$key]}
done

echo "七、遍历所有value:"
for val in ${myMap[@]};do
  echo "value:"$val
done

引用：
https://www.cnblogs.com/yy3b2007com/p/11267237.html