一个关于 sed 的问题 - V2EX

一个关于 sed 的问题 - V2EX

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有两个文件A和B，要求删除A中所有在B中出现的行。用SED如何实现？或其他方法也可

5 条回复 2014-08-20 18:05:22 +08:00

1

plprapper

2014-08-20 16:52:14 +08:00

awk 'NR==FNR{ map[$0]="1"} NR>FNR{if(map[$0]==""){ print $0}}' B A
大概是这意思吧

2

jatsz

2014-08-20 17:29:46 +08:00

1

$grep -f B -v A

3

ggarlic

2014-08-20 17:46:23 +08:00

comm -23 A B

4

jamesxu

2014-08-20 17:50:27 +08:00

@jatsz
@ggarlic grep 比较简洁， comm 要两个文件都排好序才行

5

ggarlic

2014-08-20 18:05:22 +08:00

@jamesxu 对，我忘了说这点了，很要命的一点

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