找到PATTERN时合并两个文本文件的行 [英] Merge lines of two text files when PATTERN is found

问题描述

我正在寻找awk或sed解决方案以基于匹配的模式组合2个文件，如下所示:在这种情况下，PATTERN是"cat".文件2中的行数将始终等于文件1中的模式匹配数.

I am looking for an awk or sed solution to combine 2 files based on a matched pattern, like so: The PATTERN in this case is "cat". The number of lines in file 2 will always equal the number of pattern matches in file 1.

文件1:

I am a cat  
I am a dog    
I am a dog  
I am a cat  
I am a dog

文件2:

line 1  
line 2

合并文件:

I am a cat  
line 1  
I am a dog  
I am a dog  
I am a cat  
line 2  
I am a dog

推荐答案

尝试使用这种awk的衬纸:

Try this awk one liner:

awk 'NR==FNR{a[NR]=$0;next}1;/cat/{print a[++i]}' file2 file1

测试:

$ cat file1
I am a cat
I am a dog
I am a dog
I am a cat
I am a dog

$ cat file2
line 1
line 2

$ awk 'NR==FNR{a[NR]=$0;next}1;/cat/{print a[++i]}' file2 file1
I am a cat
line 1
I am a dog
I am a dog
I am a cat
line 2
I am a dog

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