Create a hashmap that contains strings and a list in powershell?

Question

In powershell how does one create a hashmap that contains a string as the key and a list of strings as the values?

For example, in Java, the following can be done:

Map<String, List<String> myMap = new HashMap<String, List<String>();

Does powershell contain this capability?

I've tried:

$myMap = @{ [string], New-Object Collections.Generic.List[string] } 

But this didn't work.

Answer 1

$myMap = @{ "Michigan"="Detroit"; "California" = "Sacremento","Hollywood";"Texas"="Austin" } 

Note how California has two values assigned to it's key. Also note how you will run into trouble if you ever try to export this to csv, the enumerator skips over the array value and just inserts "System.Object[]" into the csv file, probably as it should.

Update

To dynamically update the list,

$myMap.California += "Compton"

Answer 2

I figured it out.

$myList = New-Object Collections.Generic.List[string]
$myList.Add("one")
$myList.Add("two")
$myList.Add("three")

$myHash = @{ }
$myHash.Add("list", $myList)