ask for one shell

zwq_sh

there is a config file
Name=Name1
basedir=/home
basedir=/opt
...

ask for one shell to delete all lines which have defined below

waker

sed '/ask for one shell to delete all lines which have defined below/Q' urfile

zwq_sh

that is after process, the result file should be like this:
Name=Name1
basedir=/opt
...

zwq_sh

...
No...

awk就是awp加ak

2楼的你没看啊？？
sed '/match/q' urfile
sed '/match/,$d' urfile
sed -n '1,/match/p' urfile
...

twf_cc

LZ 是否要這樣？'=
[victor@localhost ~]$ cat junk.txt
there is a config file
Name=Name1
basedir=/home
basedir=/opt
...,,,,,,
qqqqqqqqqqqqqq

qqqqqqqqqqq
qqqqqqqqqqqqq
qqqqqqqqqq
[victor@localhost ~]$ sed 4q junk.txt
there is a config file
Name=Name1
basedir=/home
basedir=/opt

awk就是awp加ak

楼主的心思你猜我猜猜猜，猜对有奖。。。

chzht001

原帖由 awk就是awp加ak 于 2006-11-21 14:47 发表
楼主的心思你猜我猜猜猜，猜对有奖。。。

你们猜吧，我放弃了

zwq_sh

config file, each line like xxx=yyy, xxx is variable, yyy is the value of xxx
write a shell to do that
if for any xxx, exist
1. in line Nxx=yyy, and
2. in another line Mxx=zzz,
3. M>N,
then delete line N

Edengundam

1. 
   
2. #!/bin/sh
   
3. 
   
4. awk '
   
5. BEGIN {
   
6.     FS = "="
   
7. }
   
8. 
   
9. {
   
10.     hash[$1] = $2
    
11. }
    
12. END {
    
13.     for (item in hash)
    
14.         print item"="hash[item]
    
15. }'
    

复制代码

和排序类似是不稳定的算法

[ 本帖最后由 Edengundam 于 2006-11-22 11:16 编辑 ]