Powershell and $matches

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  I'm still looking for a reason why that doesn't work, but here are a couple of other ways to accomplish finding all of the matches:

  ("This is a test. How was your test?" | Select-String -pattern "test" -AllMatches).matches
  

  
  Groups   : {test}
  Success  : True
  Captures : {test}
  Index    : 10
  Length   : 4
  Value    : test
  
  Groups   : {test}
  Success  : True
  Captures : {test}
  Index    : 29
  Length   : 4
  Value    : test

  [regex]::Matches("This is a test. How was your test?","test")
  

  
  Groups   : {test}
  Success  : True
  Captures : {test}
  Index    : 10
  Length   : 4
  Value    : test
  
  Groups   : {test}
  Success  : True
  Captures : {test}
  Index    : 29
  Length   : 4
  Value    : test

   

  Thursday, August 4, 2011 2:14 AM
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  Ok, looks like PowerShell doesn't support a global match using the -match operator. So the examples I posted above are the best ways to perform a global match. See link below for more information at about halfway through the document.

  http://www.johndcook.com/regex.html

   

  Connect link regarding this as well.

  https://connect.microsoft.com/feedback/ViewFeedback.aspx?FeedbackID=264229&SiteID=99

  
  

  Thursday, August 4, 2011 2:18 AM
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  -match returns as soon as it finds a match in the string.

  $matches[0] will always be the matched component.  The subsequent array elements will be any capture groups within the regex.

  $text -match ".(te)(st)"

  True

  Name                           Value                                                                                                                                      
  ----                           -----                                                                                                                                      
  2                              st                                                                                                                                         
  1                              te                                                                                                                                         
  0                               test   

   

  If you're after multiple matches in the same string, you can use the static matches method of regex:

  [regex]::matches($text,".test")

   

  
  Groups   : { test}
  Success  : True
  Captures : { test}
  Index    : 9
  Length   : 5
  Value    :  test

  Groups   : { test}
  Success  : True
  Captures : { test}
  Index    : 28
  Length   : 5
  Value    :  test

   

  ---

  [string](0..33|%{[char][int](46+("686552495351636652556262185355647068516270555358646562655775 0645570").substring(($_*2),2))})-replace " "
  

  • Proposed as answer by Lincoln Atkinson Thursday, August 4, 2011 2:33 PM
  • Marked as answer by Tiger LiMicrosoft employee Wednesday, August 10, 2011 1:36 AM

  Thursday, August 4, 2011 2:22 AM
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  The way the capture group enumeration works in $matches, if it did do a global match return, it would result in unpredicatable enumeration of the captures.

  ---

  [string](0..33|%{[char][int](46+("686552495351636652556262185355647068516270555358646562655775 0645570").substring(($_*2),2))})-replace " "

  Thursday, August 4, 2011 1:36 PM