Remove all characters except regex pattern in array

Question

So Im creating an array of all the versions of a particular pkg in a directory What I want to do is strip out all the characters except the version numbers The first array has info such as

GoogleChrome.45.45.34.nupkg GoogleChrome.34.28.34.nupkg

So the output I need is 45.45.34 34.28.34

$dirList = Get-ChildItem $sourceDir -Recurse -Include "*.nupkg" -Exclude 
$pkgExclude | 
   Foreach-Object {$_.Name}

$reg = '.*[0-9]*.nupkg'
$appName ='GoogleChrome'

$ouText = $dirList | Select-String $appName$reg -AllMatches | % { 
$_.Matches.Value }
$ouText
$verReg='(\d+)(.)(?!nupkg)'

The last regex matches the pattern of what I want to keep but I cant figure out how to extract what I dont need.

Try Select-String '(?<=GoogleChrome\.)\d+(?:\.\d+)+' -AllMatches — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Aug 22, 2017 at 10:21

Wiktor Stribiżew · Accepted Answer · 2017-08-22 10:33:46Z

2

You do not need to post-process matches if you apply the right pattern from the start.

In order to extract . separated digits in between GoogleChrome. and .nupkg you may use

Select-String '(?<=GoogleChrome\.)[\d.]+(?=\.nupkg)' -AllMatches

See the regex demo

Details

(?<=GoogleChrome\.) - the location should be preceded with GoogleChrome. substring
[\d.]+ - one or more digits or/and .
(?=\.nupkg) - there must be .nupkg immediately to the right of the current location.

If .nupkg should not be relied upon, use

Select-String '(?<=GoogleChrome\.)\d+(?:\.\d+)+' -AllMatches

Here, \d+(?:\.\d+)+ will match 1 or more digits followed with 1 or more occurrences of a . and 1+ digits only if preceded with GoogleChrome..

answered Aug 22, 2017 at 10:33

Wiktor Stribiżew

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Comments

marvel308 · Accepted Answer · 2017-08-22 10:21:51Z

1

(\d+.?)+(?!nupkg)

this would give you desired output in the match, check the regex demo

answered Aug 22, 2017 at 10:21

marvel308

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