str="a,b"
arr=(${str//,/ })
echo ${arr[1]}
# output
b
str="a,b"
arr=(${str//,/ })
echo ${arr[1]}
# output
b
str="a,b"
arr=(${str//,/ })
echo ${arr[1]}
# output
b
Shell如何分割字符串
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str="a,b"
arr=(${str//,/ })
echo ${arr[1]}
# output
b