TypeClass.ps1

function Is-Value ($Value) {
    $Value = $($Value)
    $Value -is [ValueType] -or $Value -is [string] -or $value -is [scriptblock]
}

function Is-Collection ($Value) {
    # check for value types and strings explicitly
    # because otherwise it does not work for decimal
    # so let's skip all values we definitely know
    # are not collections
    if ($Value -is [ValueType] -or $Value -is [string]) {
        return $false
    }

    -not [object]::ReferenceEquals($Value, $($Value))
}

function Is-ScriptBlock ($Value) {
    $Value -is [ScriptBlock]
}

function Is-DecimalNumber ($Value) {
    $Value -is [float] -or $Value -is [single] -or $Value -is [double] -or $Value -is [decimal]
}

function Is-Hashtable ($Value) {
    $Value -is [hashtable]
}

function Is-Dictionary ($Value) {
    $Value -is [System.Collections.IDictionary]
}


function Is-Object ($Value) {
    # here we need to approximate that that object is not value
    # or any special category of object, so other checks might
    # need to be added

    -not ($null -eq $Value -or (Is-Value -Value $Value) -or (Is-Collection -Value $Value))
}