Powershell-Match运算符只查找第一个匹配项

Question

"This is **bold** and this is also **BOLD**,finally this is also **Bold**" -match '**.*?**'

仅查找第一个匹配的

$Matches.count

仅返回1

对-Replace执行相同操作在字符串中查找所有匹配项：

"This is **bold** and this is also **BOLD**,finally this is also **Bold**" -replace '**.*?**', 'Substring'

它匹配并替换所有实例：

This is Substring and this is also Substring,finally this is also Substring

如何让-Match运算符查找所有匹配项，并将它们作为属于$Matches变量的数组返回？谢谢

Answer 1

• -match运算符确实在其输入中最多只找到一个匹配，而-replace总是找到并替换所有的匹配。

• 从PowerShell 7.2.x开始，您需要使用底层。NET API直接查找多个匹配，即[regex]::Matches()方法。

  • GitHub问题#7867建议引入-matchall运算符来提供PowerShell本机实现-虽然该提议已获得批准，但尚未有人着手实施

[regex]::Matches(
'This is **bold** and this is also **BOLD**,finally this is also **Bold**',
'**.*?**'
).Value

请注意，[regex]::Matches()返回[System.Text.RegularExpressions.Match]实例的集合，其.Value属性包含匹配的文本。