GNU awk，FPAT以及重复FS带来的麻烦 [英] GNU awk, FPAT and trouble with a duplicating FS

问题描述

我有一个文件:

$ cat file
1,,"3.1,3.2",4,5

并且由于使用了引号，我正在使用 FPAT =([[^，] *)|(\" [^ \] + \")) 而不只是 FS ="，".我正在尝试用另一个值替换 $ 4 字段，

and because of the quotes I'm using FPAT = "([^,]*)|(\"[^\"]+\")") instead of just FS=",". I'm trying to replace a field, lets say $4, with another value:

$ gawk 'BEGIN{FPAT="([^,]*)|(\"[^\"]+\")"; OFS=","}{$4="new"; print}' file
1,,"3.1,3.2",new,,5
$ # right here  ^

但是在替换字段之后，我得到了重复的 ( OFS ).修改除最后一个字段或空字段以外的任何字段时，它都会重复.

but I get a duplicated , (OFS) after the replaced field. It gets duplicated when modifying any field except last field or empty fields.

你们是看到这些还是只是我需要眼镜8 |?我正在使用GNU Awk 4.1.3.

Are you guys seeing this or is it just me in need of glasses 8| ? I'm using GNU Awk 4.1.3.

哈，一定是个老错误.4.1.1复制逗号，但4.1.4不复制.

A-ha, it must be an old bug. 4.1.1 duplicates the comma but 4.1.4 doesn't.

推荐答案

显然，这是4.1.4版之前的GNU awk中的错误.

Apparently it's a bug in GNU awk prior to version 4.1.4.

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