Counting Matches in an Array

Hello Rich89,

Excerpt from -match operator documentation:

...When the input is a collection of values, the operators return any matching members. If there are no matches in a collection, the operators return an empty array.

So in your specific use case:

$howMany  = $files.hash -match $file.hash

If there are identical files in $files.hash collection, your $howMany variable will contain collection of matching hashes.(in this case there will be at least 2 members).

If there are no duplicates of specific file hash your $howMany variable will contain empty array.

Reference: about_Comparison_Operators.MatchingOperators

Hope that helps.