Combine two dictionaries and replace keys with values in powershell - powershell

Question

i have two arrays that look like this:
$ht1 = #{
"computer55" = "port33"
“computer1” = “port1”
“computer2” = “port2”
}
and
$ht2 = #{
"A1:B2:C3:D4:E5:F6" = "port1"
"A2:B3:C4:D5:E6:F7" = "port2"
"A3:B4:C5:D6:E7:F8" = "port33"
"A4:B4:C5:D6:E7:F8" = "port45"
}
The first one is one I manually hardcode into the script, I have an actual list of device names and what port they are plugged into on a switch. The second one is generated with a switch script that logs in, gets the mac address table and records it as a hashtable.
My desired outcome is this, if there is a port with an assigned name, replace the port name with the device name.
$ht3(or any name) = #{
"A1:B2:C3:D4:E5:F6" = "computer1"
"A2:B3:C4:D5:E6:F7" = "computer2"
"A3:B4:C5:D6:E7:F8" = "computer55"
"A4:B4:C5:D6:E7:F8" = "port45"
}
I've somehow spent about a day on this(... pretty much the first powershell script I've ever came up with) and my end result is always the same, I end up merging two hashtables and pair the port with the computer name and not the mac address with the computer name. any direction is appreciated

Answer 1

Important note, the .ContainsValue method is case sensitive, if you want a case insensitive search use one of the following:
if($val = [string]$ht1.Keys.Where({$ht1[$_] -eq $ht2[$key]}))
{
#{$key = $val}
continue
}
if($ht1.Values -contains $ht2[$key])
{
...
}
if($ht2[$key] -in $ht1.Values)
{
...
}
Code
$ht1 = #{
computer55 = 'port33'
computer1 = 'port1'
computer2 = 'port2'
}
$ht2 = #{
'A1:B2:C3:D4:E5:F6' = 'port1'
'A2:B3:C4:D5:E6:F7' = 'port2'
'A3:B4:C5:D6:E7:F8' = 'port33'
'A4:B4:C5:D6:E7:F8' = 'port45'
}
$result = foreach($key in $ht2.Keys)
{
if($ht1.ContainsValue($ht2[$key]))
{
#{$key = [string]$ht1.Keys.Where({$ht1[$_] -eq $ht2[$key]})}
continue
}
#{$key = $ht2[$key]}
}
Looking at $result yields:
Name Value
---- -----
A1:B2:C3:D4:E5:F6 computer1
A3:B4:C5:D6:E7:F8 computer55
A4:B4:C5:D6:E7:F8 port45
A2:B3:C4:D5:E6:F7 computer2
[string]$ht1.Keys.Where({$ht1[$_] -eq $ht2[$key]})
Could also be the following, though, I'm not sure which one would be more efficient:
$ht1.GetEnumerator().Where({$_.Value -eq $ht2[$key]}).Key