Can someone help me with getting the below PowerShell code?
The $value array has some duplicate values, and I'm struggling to figure out how to get the compare operator in line 2 to work.
I want it to show me if a value is repeated anywhere within the array. Thank you
foreach ($key in $value) {
if ($key.count -gt 1) {
Write-Host "$key"
}
}
Sample data
$value = "a","a","b","b","c","d","e","f","f";
To see duplicates and the count greater than 1 use group-object and select-object to get the Name and Count properties.
$value | Group-Object | Where-Object {$_.Count -gt 1} | Select-Object Name, Count;
Output
Name Count
---- -----
a 2
b 2
f 2
One way to omit duplicates would be to use a foreach-object and then pipe that over to sort-object and use the -unique parameter to return only the unique values.
$value | ForEach-Object {$_} | Sort-Object -Unique;
Another way to omit duplicates would be to use group-object along with its -noElement parameter and then expand the Name property value without a header column.
($value | Group-Object -NoElement).Name;
Standard Aliases for Foreach-Object: the '
%' symbol, ForEach
-UniqueReturn only the unique values
-noElementDon’t include members of each group in the output objects.
