shell中的数组和列表

一、列表(list)和数组(array)

1、seq

root@localhost:/appfs# seq 5 //起始默认是1,间隔默认也是1
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2
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5
root@localhost:/appfs# alist=$(seq 5) //alist得到的是字符串,不同之处是以空格隔开
root@localhost:/appfs# echo $alist
1 2 3 4 5
root@localhost:/appfs# for i in $alist; do echo $i; done; //可看成是list,用for...in循环读取
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5
root@localhost:/appfs# echo {1..5}  //通过内部{begin..end}生成,性能比seq快
1 2 3 4 5
root@localhost:/appfs# for i in {1..5}; do echo $i; done
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5

2、array

root@localhost:/appfs# arry=($alist) //如果需要生成array,只需要将$(seq 5)再加个“()”即可
root@localhost:/appfs# echo $arry
1
root@localhost:/appfs# echo ${arry[0]}
1
root@localhost:/appfs# echo ${arry[1]}
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root@localhost:/appfs# echo ${arry[3]}
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root@localhost:/appfs# echo ${arry[@]}
1 2 3 4 5
root@localhost:/appfs# for i in ${arry[@]}; do echo $i; done
1
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5

 

posted @ 2022-07-11 17:45  Lin_泠沐  阅读(5163)  评论(0编辑  收藏  举报