Return PowerShell 3.0 中函数的数组

Question

我正在尝试让 PowerShell 3.0 return 来自函数的数组。不幸的是，这没有很好的记录，因为我在过去两天里一直在搜索 Google 来寻找这方面的例子。我差点用 C# 重写整个脚本并收工了。

该脚本检查包含在变量中的一组 URLS。有问题的函数从一个数组中获取 URL 的列表，并循环遍历该数组，将 HTTP 状态代码添加到一个新数组中。该函数执行上述所有操作，但它不 return 数组。这是有问题的功能：

function URLCheck ($URLStatusCode)
{
    foreach($uri in $URLStatusCode )
    {
        $result = @()
        $time = try
        {
            $request = $null
            ## Check response time of requested URI.
            $result1 = Measure-Command { $request = Invoke-WebRequest -Uri $uri}
            $result1.TotalMilliseconds
        }
        catch
        {
            <# If request generates exception such as 401, 404 302 etc,
            pull status code and add to array that will be emailed to users #>
            $request = $_.exception.response
            $time = -1
        }
        $result += [PSCustomObject] @{
            Time = Get-Date;
            Uri = $uri;
            StatusCode = [int] $request.StatusCode; 
            StatusDescription = $request.StatusDescription; 
            ResponseLength = $request.RawContentLength; 
            TimeTaken =  $time;
        }
    }
    return $result
}

我这样称呼：

URLCheck $LinuxNonProdURLList
$result

执行后我还打印了 $result 的内容，我注意到它是空的。但是，如果我将 return 语句放在 foreach 循环中，它会将信息发送到控制台。

如有任何帮助，我们将不胜感激。

Answer 1

经过更多的故障排除后，我发现数组 $result 只是该函数的本地数组。我在 foreach 循环之外声明了数组并修复了错误。这是更新后的代码：

function URLCheck ($URLStatusCode)
{
    $result = @()
    foreach($uri in $URLStatusCode )
    {
        $time = try
        {
            $request = $null
            ## Check response time of requested URI.
            $result1 = Measure-Command { $request = Invoke-WebRequest -Uri $uri}
            $result1.TotalMilliseconds
        }
        catch
        {
            <# If request generates exception such as 401, 404 302 etc,
            pull status code and add to array that will be emailed to users #>
            $request = $_.exception.response
            $time = -1
        }
        $result += [PSCustomObject] @{
            Time = Get-Date;
            Uri = $uri;
            StatusCode = [int] $request.StatusCode; 
            StatusDescription = $request.StatusDescription; 
            ResponseLength = $request.RawContentLength; 
            TimeTaken =  $time;
        }
    }
    return $result
}

Return PowerShell 3.0 中函数的数组

Return an array from a function in PowerShell 3.0

arrays

powershell

powershell-3.0