CODEWITHSUNDEEP
regexpowershell
Vidar Åsberg
Vidar Åsberg

Reputation: 33

Parse and replace multiple variants using PowerShells regex

Parsing a text document using the code below matches every instance of '333', however I would like only the three examples below to be changed. 

(Get-Content input.json) | ForEach-Object {
    $_ -replace '333', '666'
} | Set-Content output.json

This should change:

This should be left unchanged:

What is the PowerShell regex solution for this?

Upvotes: 3

Views: 52

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626893

You may use

(?i)(?<=\b(?:se)?)333\b

See the regex demo

Details

  • (?i) - case insensitive modifier
  • (?<=\b(?:se)?) - before 333 there must be a word boundary and anoptional substrin se
  • 333 - a literal substring
  • \b - a trailing word boundary.

Powershell test:

PS> $s = "se333 SE333 333 1212333 3331212 333asda asd333"
PS> $s -replace '(?i)(?<=\b(?:se)?)333\b', '666'
se666 SE666 666 1212333 3331212 333asda asd333

Upvotes: 4

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