Question

这个答案在这里：Powershell break a long array into a array of array with length of N in one line?

几乎完美地回答了我的要求。我想要做的是对我的元素进行分组，以便第一组中有一个额外的元素，而其他所有元素都在每个组中重复第一个元素。

像这样：

$bigList = ("Name","One","Two","Three","Four","Five","six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen")

$counter = [pscustomobject] @{ Value = 0 }
$groupSize = 5

$groups = $bigList | Group-Object -Property { [math]::Floor($counter.Value++ / $groupSize) }

我的小组最终看起来像这样......

Name, One, Two, Three, Four, Five
Name, Six, Seven, Eight, Nine, Ten
Name, Eleven, Twelve, Thirteen

Answer 1

这是怎么回事：

$bigList = ("Name","One","Two","Three","Four","Five","six","Seven","Eight","Nine","Ten","Eleven","Twelve","Thirteen")

$counter = [pscustomobject] @{ Value = 0 }
$groupSize = 5

$bigList[1..$biglist.count] |
    Group-Object -Property { [math]::Floor($counter.Value++ / $groupSize) } |
    foreach-object {
        $_.Group.Insert(0,$biglist[0])
        write-output $_
    }

输出：

Count Name                      Group                                                                                                                                                                                                      
----- ----                      -----                                                                                                                                                                                                      
    5 0                         {Name, One, Two, Three...}                                                                                                                                                                                 
    5 1                         {Name, six, Seven, Eight...}                                                                                                                                                                               
    3 2                         {Name, Eleven, Twelve, Thirteen}

这可以通过剥离第一个元素（“Name”）并通过group-object cmdlet发送数组的其余部分来实现。通过将大列表的第一个元素中的值插入foreach-object属性，可以在group scriptblock中修改生成的对象。修改后的对象将重新写入管道。

假设您希望在数组列表中使用这些，您需要稍微修改代码：

$arrayList = $bigList[1..$biglist.count] |
    Group-Object -Property { [math]::Floor($counter.Value++ / $groupSize) } |
    ForEach-Object {
        $_.Group.Insert(0,$biglist[0])
        ,$_.group
    }

$arraylist | 
    % {
        write-host ( $_ -join "," )
    }

在这里，我们故意仅输出来自group的{{1}}对象的groupinfo属性。此外，我们使用group-object运算符强制powershell输出单个数组。如果没有这样做，我们最终得到的单个数组就像,一样，但每5个元素都有额外的'Name'实例。最后一段代码输出$biglist的每个元素的内容，与逗号连接以证明我们确实有一个数组数组：

$arrayList

Powershell将长数组拆分为长度为N的数组数组，并在子数组中重复第一个元素

1 个答案: