powershell - 将哈希表添加到哈希表

Question

我正在尝试使用powershell将哈希表添加到哈希表。但是，我收到以下错误:
Item has already been added. Key in dictionary: 'Dev' Key being added: 'Dev'
这是我的代码:

$colors = @("black","white","yellow","blue")

$Applications=@{}

Foreach ($i in $colors)
{
    $Applications += @{
        Colour = $i
        Prod = 'SrvProd05'
        QA   = 'SrvQA02'
        Dev  = 'SrvDev12'
    }
}

我究竟做错了什么？

Answer 1

我认为您想要的是更多这样的东西:

$colors = @("black","white","yellow","blue")
$Applications=@{}
Foreach ($i in $colors)
{
    $Applications[$i] = @{
        Colour = $i
        Prod = 'SrvProd05'
        QA   = 'SrvQA02'
        Dev  = 'SrvDev12'
    }
}

我还要指出，哈希表通常需要防御性地处理。每个键必须是唯一的，但值不必是唯一的。这是处理该问题的典型方法:

$colors = @("black","white","yellow","blue")
$Applications=@{}
Foreach ($i in $colors)
{
    if($Applications.ContainsKey($i)){
        #Do things here if there is already an entry for this key
    }else{
        $Applications[$i] = @{
            Colour = $i
            Prod = 'SrvProd05'
            QA   = 'SrvQA02'
            Dev  = 'SrvDev12'
        }
    }
}