regex - 除非双引号内存在逗号，否则从 CSV 中删除双引号的 Powershell 脚本

Question

我有以下文件格式的 .csv:

In: "bob","1234 Main St, New York, NY","cool guy"

我想删除里面没有逗号的双引号:

Out: bob,"1234 Main St, New York, Ny",cool guy

有没有办法在 Powershell 中做到这一点？

我检查过:

How to remove double quotes on specific column from CSV file using Powershell script

http://blogs.technet.com/b/heyscriptingguy/archive/2011/11/02/remove-unwanted-quotation-marks-from-csv-files-by-using-powershell.aspx

https://social.technet.microsoft.com/Forums/windowsserver/en-US/f6b610b6-bfb2-4140-9529-e61ad30b8927/how-to-export-csv-without-doublequote?forum=winserverpowershell

Answer 1

改编来自 "How to remove double quotes on specific column from CSV file using Powershell script" 的代码:

$csv = 'C:\path\to\your.csv'
(Get-Content $csv) -replace '(?m)"([^,]*?)"(?=,|$)', '$1' |
    Set-Content $csv

正则表达式 (?m)"([^,]*?)"(?=,|$)匹配任何 " + 0 or more non-commas + "在逗号或行尾之前(通过正向预测和多行选项 (?m) 实现，强制 $ 匹配换行符，而不仅仅是字符串的结尾)。

见 regex demo