正则表达式拆分与字符串拆分有何不同

Question

使用split运算符时，如：

**********************
PowerShell transcript start
Start time: 20210719105630
Username: gondornicholas
RunAs User: gondornicholas
Configuration Name: 
Machine: gondor (Unix 5.8.0.59)
Host Application: /snap/powershell/160/opt/powershell/pwsh.dll
Process ID: 16273
PSVersion: 7.1.3
PSEdition: Core
GitCommitId: 7.1.3
OS: Linux 5.8.0-59-generic #66-Ubuntu SMP Thu Jun 17 00:46:01 UTC 2021
Platform: Unix
PSCompatibleVersions: 1.0, 2.0, 3.0, 4.0, 5.0, 5.1.10032.0, 6.0.0, 6.1.0, 6.2.0, 7.0.0, 7.1.3
PSRemotingProtocolVersion: 2.3
SerializationVersion: 1.1.0.1
WSManStackVersion: 3.0
**********************
Transcript started, output file is strings.txt
PS /home/nicholas/power_shell> $string = "b1i9r8t7h"  
PS /home/nicholas/power_shell> $array = $string -split "d"
PS /home/nicholas/power_shell> $array
b
i
r
t
h
PS /home/nicholas/power_shell> $array = $string -split "D"
PS /home/nicholas/power_shell> $array
1
9
8
7
PS /home/nicholas/power_shell> $array = $string.split("D")
PS /home/nicholas/power_shell> $array
b1i9r8t7h
PS /home/nicholas/power_shell> $array = $string.split("d")
PS /home/nicholas/power_shell> $array
b1i9r8t7h
PS /home/nicholas/power_shell> Stop-Transcript
**********************
PowerShell transcript end
End time: 20210719105811
**********************

使用上面的点运算符的结果是什么？它有什么作用吗？没有什么似乎它应该做些什么或返回一个错误。

如何区分函数和运算符

另请参阅：

https://www.sqlshack.com/powershell-split-a-string-into-an-array/

https://learn.microsoft.com/en-us/dotnet/api/system.string.split?view=net-5.0

https://learn.microsoft.com/en-us/dotnet/api/system.text.regularexpressions.regex.split?view=net-5.0

---

附带说明一下，如何从REPL控制台访问操作员和功能的帮助文件

Answer 1

帮助文件说：

备注

Regex.Split方法类似于String.Split(Char[](方法，但Regex.Split在分隔符处拆分字符串由正则表达式而不是一组字符确定。

这一切都很好。

欢迎更深入的回答。