如何使用awk重命名重复的行? [英] How to rename duplicate lines with awk?

问题描述

我有一个包含100万行的文件，有些行重复.我想通过添加变体" +一个数字来重命名重复的行.该文件的格式如下:

I have a file with 1 million lines and some lines are duplicate. I would like to rename the duplicate lines by appending "variant" + a number. The file is formatted as follows:

I am a test line
She is beautiful
need for speed
Nice day today
I am a test line
stack overflow is fun
I am a test line
stack overflow is fun
I have more sentences
I am a test line
She is beautiful
Speed for need
stack overflow is fun
Let's stop here

所需结果:

    I am a test line
    She is beautiful
    need for speed
    Nice day today
    I am a test line variant 1
    stack overflow is fun
    I am a test line variant 2
    stack overflow is fun variant 1
    I have more sentences
    I am a test line variant 3
    She is beautiful variant 1
    Speed for need variant 1
    stack overflow is fun variant 2
    Let's stop here

推荐答案

$ awk 'cnt[$0]++{$0=$0" variant "cnt[$0]-1} 1' file
I am a test line
She is beautiful
need for speed
Nice day today
I am a test line variant 1
stack overflow is fun
I am a test line variant 2
stack overflow is fun variant 1
I have more sentences
I am a test line variant 3
She is beautiful variant 1
Speed for need
stack overflow is fun variant 2
Let's stop here

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