Powershell exclusion

Question

I have a small script where I am trying to exclude names starting with "test", "dev" etc...

I want to create a separate variable as $exclusionpattern = @("dev" , "test") -join "|"

and want to use that in foreach loop to exclude names containing dev or test, also with underscores, can someone help me with their thoughts

    foreach ($group in $Data) {
        $testName = $group.Name.Split(".")[4]
        $Componentname = $group.name.split(".")[5]
        $Name          = $group.Name.Split(".")[6]
        
        If (($group.Group[-1].Value -eq "0.0") -and ($group.Group[-2].Value -eq "0.0")) {
            Write-Verbose "$testName $Componentname $Name is DOWN" -Verbose
        }
        ElseIf (($group.Group[-1].Value -eq "2.0") -and ($group.Group[-2].Value -eq "1.0")) {
            Write-Verbose "$testName $Componentname $Name is UP" -Verbose
        }
        ElseIf (($group.Group[-1].Value -eq "1.0") -and ($group.Group[-2].Value -eq "2.0")) {
            Write-Verbose "$testName $Componentname $Name is OUT OF SERVICE" -Verbose
        }
    }

Answer 1

You have three variables in your example that have "name" as part of their name. You can replace the "$name" in the conditional expression with another one if I chose the wrong one.

$exclusionpattern = @("dev", "test", "_") -join "|"

foreach ($group in $Data) {
    $testName = $group.Name.Split(".")[4]
    $Componentname = $group.name.split(".")[5]
    $Name          = $group.Name.Split(".")[6]
    
    if ($name -match $exclusionpattern){
        continue
    }

    If (($group.Group[-1].Value -eq "0.0") -and ($group.Group[-2].Value -eq "0.0")) {
        Write-Verbose "$testName $Componentname $Name is DOWN" -Verbose
    }
    ElseIf (($group.Group[-1].Value -eq "2.0") -and ($group.Group[-2].Value -eq "1.0")) {
        Write-Verbose "$testName $Componentname $Name is UP" -Verbose
    }
    ElseIf (($group.Group[-1].Value -eq "1.0") -and ($group.Group[-2].Value -eq "2.0")) {
        Write-Verbose "$testName $Componentname $Name is OUT OF SERVICE" -Verbose
    }
}

Answer 2

Something like this?

$Names = "ThisIsATest", "ThisTestIsOkay","IContainA_Character","ImNotARobot"
$exclusionpattern = @("dev" , "test", "_") -join "|"

Foreach ($name in $Names){
    if ($name -match $exclusionpattern){
        "Dropping $name"
    }
    else{
        "Name is Okay $name"
    }
}