function directory_ll {
    $items = Get-ChildItem -Force | 
    Select-Object @{
        Name = 'Mode'; 
        Expression = { $_.Mode }
    }, @{
        Name = 'LastWriteTime'; 
        Expression = { $_.LastWriteTime.ToString("yyyy-MM-dd HH:mm") }
    }, @{
        Name = 'Size'; 
        Expression = { 
            if ($_.Length -ge 1GB) { "{0:N2} GB" -f ($_.Length / 1GB) }
            elseif ($_.Length -ge 1MB) { "{0:N2} MB" -f ($_.Length / 1MB) }
            elseif ($_.Length -ge 1KB) { "{0:N2} KB" -f ($_.Length / 1KB) }
            else { "$($_.Length) B" }
        }
    }, @{
        Name = 'Name'; 
        Expression = { $_.Name }
    }, @{
        Name = 'IsDirectory'; 
        Expression = { $_.PSIsContainer }
    }
    
    foreach ($item in $items) {
        $name = if ($item.IsDirectory) { "$($item.Name)/" } else { $item.Name }
        $color = if ($item.IsDirectory) { "Blue" } else { "White" }
        Write-Host ("{0,-6} {1,-16} {2,-10} " -f $item.Mode, $item.LastWriteTime, $item.Size) -NoNewline
        Write-Host $name -ForegroundColor $color
    }
}
Set-Alias ll directory_ll