Powershell Collections HashTables (Dictionaries)

psCollectionsHashtable.ps1

# PowerShell Collections HashTables (Dictionaries)

[Hashtable] $firstTable = @{
	mykey = "myvalue"
    label = "value"
    akey = ”cat”
    someOtherKey = "dog"
    intValueKey = 123
}

Write-Host "1. Table: " ( $firstTable | Format-Table | Out-String )  -ForegroundColor Yellow
Write-Host "2. Get 'mykey' Value: " ( $firstTable.'mykey' | Out-String ) -ForegroundColor Yellow
Write-Host "3. Get 'mykey' Value: " ( $firstTable["mykey"] | Out-String ) -ForegroundColor Yellow
Write-Host "4. Get 'mykey' Value: " ( $firstTable.item("mykey") | Out-String ) -ForegroundColor Yellow





[Hashtable] $secTable = @{
	myOtherKey = "myOtherValue"
    otherLabel = "otherValue"
    bkey = ”bird”
    aNewKey = "owl"
    otherIntValueKey = 456
}
Write-Host "5. Table: " ( $secTable | Format-Table | Out-String ) -ForegroundColor Cyan

$strongTypedDictionary = New-Object "System.Collections.Generic.Dictionary``2[string,int]"
$strongTypedDictionary.strongKeyInt = 1234
$strongTypedDictionary.Add( "specialKey", 1234 )
Write-Host "6. Table: " ( $secTable | Format-Table | Out-String ) -ForegroundColor Gray

Try
{
    $strongTypedDictionary.strongKey = "strongValue"
}
Catch
{
    #$ErrorMessage = $_.Exception.Message
    #$FailedItem = $_.Exception.ItemName
    Write-Host ( $_.Exception | Format-Table | Out-String ) -ForegroundColor Red
}

Write-Host "Table: " ( $strongTypedDictionary | Format-Table | Out-String ) -ForegroundColor Green


# Add collections 
$collectionOfAll = $firstTable + $secTable + $strongTypedDictionary
Write-Host "Table: " ( $collectionOfAll | Format-Table | Out-String ) -ForegroundColor Cyan

# Loop over collection and copy
$newCollection = @{}
$collectionOfAll.GetEnumerator() | ForEach-Object {

    $newCollection.Add( $_.Key, $_.Value )
    Write-Host "Key: " ( $_.Key | Out-String ) "Value: " ( $_.Value | Out-String ) -ForegroundColor Cyan
}

Write-Host "Table: " ( $newCollection | Format-Table | Out-String ) -ForegroundColor DarkRed