在Linux shell中，如何将一个字符串转化为数组？

方法一：

myvar="string1 string2 string3"
read -a myarray <<< $myvar
echo "My array: ${myarray[@]}"
echo "My array: ${myarray[0]}"
echo "My array: ${myarray[1]}"
echo "My array: ${myarray[2]}"
echo "Number of elements in the array: ${#myarray[@]}"

方法二：

myvar="string1 string2 string3"
myarray=($myvar)
echo "My array: ${myarray[@]}"
echo "My array: ${myarray[0]}"
echo "My array: ${myarray[1]}"
echo "My array: ${myarray[2]}"
echo "Number of elements in the array: ${#myarray[@]}"

方法三：

myvar="string1,string2,string3"
IFS="," read -a myarray <<< $myvar
echo "My array: ${myarray[@]}"
echo "My array: ${myarray[0]}"
echo "My array: ${myarray[1]}"
echo "My array: ${myarray[2]}"
echo "Number of elements in the array: ${#myarray[@]}"

运行结果均为：