Windows 将文件夹名称前置到数组中的路径

我希望使用foreach语句在（相对）路径数组的开头加上一个文件夹名，但它没有对数组进行任何更改（也没有错误）

注意：这更多是出于教育目的，而不是功能性目的，因为我使用了一个我已经注释掉的for循环，但我对学习foreach语句的工作方式感兴趣

$myFiles = @(
    "blah1\blah2\file1.txt"
    "blah3\blah4\file2.txt"
    "blah5\blah6\file3.txt"
)

$checkoutFolder = "folder1"

#for ($h = 0; $h -lt $myFiles.Length; $h++) {
#$myFiles[$h] = $checkoutFolder + "\" + $myFiles[$h]
#}

foreach ($path in $myFiles) {
$path = $checkoutFolder + "\" + $path
}

$myFiles

我还尝试使用缓冲区变量，例如

$buffer = $checkoutFolder + "\" + $path
$path = $buffer

但同样的结果是。 输出：

---

最好开始使用

Join-Path

cmdlet，以避免创建省略或加倍反斜杠的路径

像这样的东西可以做到：

$checkoutFolder = "folder1"
$myFiles = "blah1\blah2\file1.txt", "blah3\blah4\file2.txt", "blah5\blah6\file3.txt" | ForEach-Object {
    Join-Path -Path $checkoutFolder -ChildPath $_
}

$myFiles

输出：

---

我可以想出两种方法：

使用已修改的旧阵列数据创建新阵列

$myFiles = @(
            "blah1\blah2\file1.txt"
            "blah3\blah4\file2.txt"
            "blah5\blah6\file3.txt"
            )
$checkoutFolder = "folder1"

#Create new array $myFilesnew
$myFilesnew = @()
#For each line in in old array
foreach ($file in $myFiles)
{
#Create new row from modied row $file of $myFiles array
$row = $checkoutFolder+"\"+$file
#Add row $row to a new array $myFilesnew
$myFilesnew+=$row
}

$myFilesnew

修改现有阵列的每一行：

$myFiles = @(
            "blah1\blah2\file1.txt"
            "blah3\blah4\file2.txt"
            "blah5\blah6\file3.txt"
            )
$checkoutFolder = "folder1"

$i=0
while($i-lt $myFiles.Count)
    {
     #Get $i row $myFiles[$i] from aray, perform insert of modified data, write data back to $myFiles[$i] row of the array
     $myfiles[$i]=$myFiles[$i].Insert(0,$checkoutFolder+"\");
     #Add +1 to $i
     $i++

        }
$myFiles

---

可以用文件夹名称替换每个字符串的正则表达式开头。这也是生成计算机名的一个有用的习惯用法

'blah1\blah2\file1.txt','blah3\blah4\file2.txt','blah5\blah6\file3.txt' -replace '^','folder1\'

folder1\blah1\blah2\file1.txt
folder1\blah3\blah4\file2.txt
folder1\blah5\blah6\file3.txt

---

您的主要问题是在循环中重新使用“当前循环项”。除非有必要，否则不要这样做。[grin]您的

$Buffer

具备您所需的功能。。。所以直接用吧，我们没有你的消息。。给出的答案解决了你的问题吗？如果是，请点击✓ 在左边。这将帮助其他有类似问题的人更容易地找到它。

$myFiles = @(
            "blah1\blah2\file1.txt"
            "blah3\blah4\file2.txt"
            "blah5\blah6\file3.txt"
            )
$checkoutFolder = "folder1"

$i=0
while($i-lt $myFiles.Count)
    {
     #Get $i row $myFiles[$i] from aray, perform insert of modified data, write data back to $myFiles[$i] row of the array
     $myfiles[$i]=$myFiles[$i].Insert(0,$checkoutFolder+"\");
     #Add +1 to $i
     $i++

        }
$myFiles

'blah1\blah2\file1.txt','blah3\blah4\file2.txt','blah5\blah6\file3.txt' -replace '^','folder1\'

folder1\blah1\blah2\file1.txt
folder1\blah3\blah4\file2.txt
folder1\blah5\blah6\file3.txt