请教一个匹配问题(sed,awk)

joan8363

原文本通过TITLE分段
TITLE1
xxx
yyy
TITLE2
xxx
yyy
hello
zzz
hello
TITLE3
xxx
hello

类似于这样的，hello可能有多个，需要打印出含hello对应的TITLE段落，如（TITLE1不含hello，不打印）：
TITLE2
hello
hello
TITLE3
hello

求高手出马，谢谢

jason680

回复 1# joan8363

$ awk -vRS="TITLE[0-9]+\n" '/hello/{printf T $0}{T=RT}' FILE
TITLE2
xxx
yyy
hello
zzz
TITLE3
xxx
hello

   

moperyblue

1. echo 'TITLE1
   
2. xxx
   
3. yyy
   
4. TITLE2
   
5. xxx
   
6. yyy
   
7. hello2_1
   
8. zzz
   
9. hello2_2
   
10. TITLE3
    
11. xxx
    
12. hello3'|sed '/TITLE/{x;/\n/p;x;h;d};/hello/H;${g;q};d'
    
13. TITLE2
    
14. hello2_1
    
15. hello2_2
    
16. TITLE3
    
17. hello3

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?

sunzhiguolu

1. perl -00 -pe 's~(^TITLE\d\n)((?>(?!TITLE).*\n)+)~for $t (split("\n",$2)){if($t eq "hello"){print("$1$t\n");last}}~gem' f

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TITLE2
hello
TITLE3
hello

sunzhiguolu

回复 1# joan8363
你这个变得也太快了, 我这结果刚贴出来 文本内容换了!

1. perl -00 -pe 's~(^TITLE\d\n)((?>(?!TITLE).*\n)+)~$P=0;for $t (split("\n",$2)){if($t eq "hello"){print $1 if(!$P++);print "$t\n"}}~gem' f

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TITLE2
hello
hello
TITLE3
hello

   

reyleon

1. awk '/TITLE/{if(s~/hello/)print s;s=""}{s=s?s"\n"$0:$0}END{if(s~/hello/)print s}' file  

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haooooaaa

1. awk '/TITLE/{s=$0;a[s]}/hello/{a[s]=a[s] $0"\n"}END{for(i in a)if(a[i])printf i"\n"a[i]}'

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1. awk -vRS='TITLE[0-9]+\n' -vFPAT='hello\n' -vOFS= 'NF{$1=$1;printf m $0}{m=RT}'

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reyleon

1. awk '/TITLE/{if(s~/hello/)print s;s=$0}/hello/{s=s"\n"$0}END{if(s~/hello/)print s}' file

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haooooaaa

1. sed -n '/TITLE/h;/hello/{x;//!p;g;p}'

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