CODEWITHSUNDEEP
regexpowershell
KingBain
KingBain

Reputation: 111

Powershell Regex is only returning first result

Why is my regex pattern only returning the name/value of the first test ? I thought .+ would make it a non greedy pattern.

This is my code 

$value = "Starting test: Connectivity
          Starting test: CheckSecurityError
          Starting test: DFSREvent"


$value -match 'Starting test: (?<testName>.+)' 

$matches.testName

This is my output 

True
Connectivity

Upvotes: 0

Views: 1729

Answers (3)

JohnLBevan
JohnLBevan

Reputation: 24430

One approach would be to use the .Net class, System.Text.RegularExpressions.Regex:

$value = "Starting test: Connectivity
          Starting test: CheckSecurityError
          Starting test: DFSREvent"
$regex = [System.Text.RegularExpressions.Regex]::new('Starting test: (?<testName>.+)')
$regex.Matches($value) | %{$_.Groups['testName'].value}

#or by calling the static method rather than instantiating a regex object:
#[System.Text.RegularExpressions.Regex]::Matches($value, 'Starting test: (?<testName>.+)') | %{$_.Groups['testName'].value}

Output

Connectivity
CheckSecurityError
DFSREvent

Or you can use Select-String as mentioned in other answers / only using %{$_.Groups['testName'].value to pull back the relevant capture groups' values from your matches.

$value | 
    select-string -Pattern 'Starting test: (?<testName>.+)' -AllMatches | 
    % Matches | 
    %{$_.Groups['testName'].value}

Upvotes: 1

user6811411
user6811411

Reputation: 

$value = @"
Starting test: Connectivity
Starting test: CheckSecurityError
Starting test: DFSREvent
"@

$Pattern = '^\s*Starting test: (?<testName>.+?)$'
($value -split '\n')|
    Where-Object {$_ -match $Pattern }|
      ForEach{$matches.testname}

"-----------------"
## alternative without named capture group

$value -split '\n' | 
  select-string -pattern  'Starting test: (.+)' -all | 
    ForEach {$_.matches.groups[1].value}

Sample output:

Connectivity
CheckSecurityError
DFSREvent
-----------------
Connectivity
CheckSecurityError
DFSREvent

Upvotes: 1

majkinetor
majkinetor

Reputation: 9036

You should use select-string:

$value -split '\n' | sls 'Starting test: (?<testName>.+)' | % { Write-Host 'Result' $_ }

Upvotes: 0

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