Linux Shell Map的用法详解

declare -A myMap
myMap["my03"]="03"

declare -A myMap=(["my01"]="01" ["my02"]="02")
myMap["my03"]="03"
myMap["my04"]="04"

myMap["my03"]="03"
myMap["my04"]="04"

# 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[@]}

#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

[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