将数组输出存储到 bash 脚本中的逗号分隔列表
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Store array output to comma separated list in bash scripting
提问by Rock26
I have taken input from user into array. But I need to use them as comma separated list. How can I do that? Input in my case is path like (/usr/tmp/). I appreciate your help and time. Thank you !
我已将用户的输入输入到数组中。但我需要将它们用作逗号分隔的列表。我怎样才能做到这一点？在我的情况下，输入是类似 (/usr/tmp/) 的路径。我感谢您的帮助和时间。谢谢 ！
Example:
例子：
read "Number of subdirectories : " count
for i in $(seq 1 $count)
do
read -e -p " Subdir : $i: " arr[$i]
done
Expected Result:
预期结果：
$var = {arr[1],arr[2],arr[3],......}
回答by John1024
If you have an array like this:
如果你有一个这样的数组：
$ declare -p arr
declare -a arr='([1]="abc" [2]="def")'
You can display it in comma-separated format:
您可以以逗号分隔的格式显示它：
$ (IFS=,; echo "{${arr[*]}}")
{abc,def}
That output can be saved in a shell variable using command substitution:
可以使用命令替换将该输出保存在 shell 变量中：
$ var=$(IFS=,; echo "{${arr[*]}}")
$ echo "$var"
{abc,def}
