Question

我在unix环境中有一个包含数据的文本文件，我正在使用shell脚本对该文件执行一些操作以获取一些特定数据。文件数据如下：

USA
11111111111111111111111111
22222222222222222222222222
33333333333333333333333333
UAE
44444444444444444444444444
55555555555555555555555555
77777777777777777777777777
66666666666666666666666666
88888888888888888888888888
USA
99999999999999999999999999
10101010101010101010101010
20202020202020202020202020
50050505050005050505050505
USA
20020202022222020222220202
30303333033030333030303330
UAE
AAAAAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDD
NAE
DDDDDDDDDDDDDDDDDDDDDDDDDD
EEEEEEEEEEEEEEEEEEEEEEEEEE
JJJJJJJJJJJJJJJJJJJJJJJJJJ
KKKKKKKKKKKKKKKKKKKKKKKKKK

我想得到阿联酋以下的数据。即我期待这样的输出：预期产出：

UAE
44444444444444444444444444
55555555555555555555555555
77777777777777777777777777
66666666666666666666666666
88888888888888888888888888
UAE
AAAAAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDD

Answer 1

您可以使用awk来实现目标，

$ awk 'length($0)==3{a=($0=="UAE")?1:0}a' file

简要说明，

使用标记a确定是否打印记录
length($0)==3 $0=="UAE"，当且仅当length($0)!=3时，设置a = 1，否则a = 0
如果a，请保留SELECT something FROM table WITH (UPDLOCK) /* update locks released */以前的内容。

Answer 2

$ awk -v s=UAE '$0==s||p{p=(length($0)==length(s)?$0==s:p)}p' file
UAE
44444444444444444444444444
55555555555555555555555555
77777777777777777777777777
66666666666666666666666666
88888888888888888888888888
UAE
AAAAAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDD

说明：

$ awk -v s=UAE '                          # pass the string as variable
    $0==s||p {                            # enable p rinting if s tring matches
        p=(length($0)==length(s)?$0==s:p) # non-matching samelength string disables p 
    }
    p' file

编辑： awk中的另一个：

$ awk -v s=UAE '$0==s||length($0)==length(s)&&$0!=s&&p{p=$0==s}p' file
UAE
44444444444444444444444444
55555555555555555555555555
77777777777777777777777777
66666666666666666666666666
88888888888888888888888888
UAE
AAAAAAAAAAAAAAAAAAAAAAAAAA
BBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDD

grep一个长度的单词并选择它下面的n行，直到找到相同长度的单词

2 个答案: