带有“。”的PowerShell正则表达式

Question

i want to replace a part of some Strings in a loop with PowerShell

example string

testvm029.vmxxx

I want to replace everything at .vmxxx. Every string has another length but all ends with .vm... So the result should be: testvm029

I tried the following Script:

Foreach($String in $Strings) {

$StringTest = $String -replace "(.vm)(.+)","$null"

}

Of course this kills my String on the first vm and not at .vm... result: test

how can i achieve my goal?

EDIT: .vm is not the last '.' of my String so something like that: test123.vmabc.string

I want to cut it after .vm

Answer 1

You need to use

$String -replace '\.vm.*'

See the regex demo

The pattern will find the first .vm substring (with \\.vm ) and then match the rest of the string (with .* ). The match will be replaced with an empty string (it is used by default, but you may write it explicitly, $String -replace '\\.vm.*', '' ).