1 2 3 4 5 6 7 8 9 实现 123 456 789的几种写法

筷子eason

cat file

1
2
3

4
5
6

7
8
9
变成
123
456
789
用sed和awk 写个实现的方式 ，麻烦了

moperyblue

1. sed '/^\s*$/!{:a;N;/\n\s*$/{P;d};s/\n//;ta};d' file
   
2. sed '/^\s*$/!{:a;N;/\n\s*$/!{$!ba};s/\n\s*//gp};d' file
   
3. awk NF=NF RS= OFS= file

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fh21_xuejinlian

awk '{if(NR%4==0){$0=$0"\n"}else ORS=""}1'  file

筷子eason

太棒了 谢谢大家

sunzhiguolu

1. perl -0pe 's{^((?:\S+\n)+)\s*$}{$1=~s/\n//gr}gem' f

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yinyuemi

awk -vRS= 'NF+=0' OFS= file

sed -n 'H;/^$/bb;$bb;b;:b;x;s/\n//gp' file

jcdiy0601

1. awk 'BEGIN{RS=""}{gsub(/\n/,"",$0);print}' file

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1. sed '/^$/d;N;N;s/\n//g' file

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butterflyswim

1. xargs -n 3 <file |sed 's/ //g'

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cd_ly

awk 'NF{printf $0;next}1;END{print ""}' file