特殊用法
#!/bin/bash
city=(a b c d e f g )
echo ${city[*]:0}抽取整个数组
echo ${city[*]:1}从第一个到结束
${city[*]:0:2}从第0个开始的2个元素
删除子串
${ciyt[*]#M*a}删除从M到a的最短子串
${city[*]##M*a}删除从M到a的最长子串
替换子串
${city[*]/M*s/Year} 替换第一次M到s的子串为Year
${city[*]//M*s/Year}替换所有的M到s的子串为Year
#!/bin/bash
city=(a b c d e f g )
echo ${city[*]:0}抽取整个数组
echo ${city[*]:1}从第一个到结束
${city[*]:0:2}从第0个开始的2个元素
删除子串
${ciyt[*]#M*a}删除从M到a的最短子串
${city[*]##M*a}删除从M到a的最长子串
替换子串
${city[*]/M*s/Year} 替换第一次M到s的子串为Year
${city[*]//M*s/Year}替换所有的M到s的子串为Year