# 创建基础哈希表
$userProfile = @{
    Name = '张三'
    Department = 'IT'
    LastLogin = (Get-Date).AddDays(-3)
}

# 属性访问的三种方式
Write-Host $userProfile['Name']
Write-Host $userProfile.Name
Write-Host $userProfile.Item('Department')

# 条件性添加属性
if (-not $userProfile.ContainsKey('Office')) {
    $userProfile.Add('Office', 'Room 501')
}

# 带类型约束的哈希表
[ordered][System.Collections.Hashtable]$configTable = @{
    LogLevel = 'Debug'
    MaxRetry = 3
}

# 配置文件转换示例
$rawConfig = Get-Content appsettings.json | ConvertFrom-Json
$configTable = @{
    Environment = $rawConfig.Env
    Features = $rawConfig.Features -join ';'
    Timeout = [timespan]::FromMinutes($rawConfig.WaitTime)
}

# 快速对象比较
$diff = Compare-Object $oldTable.GetEnumerator() $newTable.GetEnumerator() -Property Name,Value

# 创建带类型约束的哈希表
$userProfile = [ordered]@{
    Name = '张三'
    Age  = 28
    Role = '管理员'
}

# 动态参数生成
function New-Service {
    param($ServiceParams)
    Start-Process -FilePath 'notepad.exe' @ServiceParams
}

$params = @{
    WindowStyle = 'Maximized'
    PassThru    = $true
}
New-Service -ServiceParams $params

# 构建商品库存系统
$inventory = @{
    '笔记本' = @{ Price=5999; Stock=15 }
    '手机'   = @{ Price=3999; Stock=30 }
    '耳机'   = @{ Price=299; Stock=100 }
}

# 实时库存查询
$inventory.Keys | Where-Object { 
    $inventory[$_].Price -lt 5000 -and
    $inventory[$_].Stock -gt 20
} | ForEach-Object {
    [PSCustomObject]@{
        商品 = $_
        价格 = $inventory[$_].Price
        库存 = $inventory[$_].Stock
    }
}