How to compare two arraylist and remove duplicate value

Question

I have two array. I would like to compare array1 to see if there any values that exist in array2 and return a new array with below expected result. Let say the outcome object is called $array3

Thanks

    $array1 = @("1", "2", "3", "4") 
    $array2 = @("5", "4", "6", "7", "8")

expected outcome:
1,2,3

Answer 1

Hi @HinW ,

comparing 2 arrays is possible using the Compare-Object cmdlet:

$array1 = @("1", "2", "3", "4") 
$array2 = @("5", "4", "6", "7", "8")
$array3 = (Compare-Object $array1 $array2 -IncludeEqual | Where-Object { $_.SideIndicator -eq "<=" }).InputObject
$array3

---

(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards

Andreas Baumgarten