猫test.sh
#!/bin/bash key="index"; arr[$key]="val" echo ${arr[${key}]}@H_403_8@/ bin / bash-x test.sh
+ key=index + arr[$key]=val + echo val val@H_403_8@然后我修改test.sh：
#!/bin/bash key="index.index"; arr[$key]="val" echo ${arr[${key}]}@H_403_8@/ bin / bash -x test.sh
+ key=index.index + arr[$key]=val test.sh: line 3: index.index: Syntax error: invalid arithmetic operator (error token is ".index") test.sh: line 4: index.index: Syntax error: invalid arithmetic operator (error token is ".index")@H_403_8@为什么会出现此错误,任何建议都会受到欢迎！
最佳答案
使用declare -A arr将数组变量声明为关联数组.
$cat test.sh
#!/bin/bash
set -x
declare -A arr
key="index.index";
arr["$key"]="val"
echo "${arr["${key}"]}"
$./test.sh
+ declare -A arr
+ key=index.index
+ arr["$key"]=val
+ echo val
val
@H_403_8@
