Powershell foreach 帮助有人可以帮忙让它只循环一次吗？

如何解决Powershell foreach 帮助有人可以帮忙让它只循环一次吗？

举个例子，我想说

robocopy "C:\SCRIPT TEST" "C:\NEW TEST" /Z /W:5 /MIR /LOG+:$Logfile

robocopy "C:\SCRIPT TEST 2" "C:\NEW TESTT" /Z /W:5 /MIR /LOG+:$Logfile

并且不要循环多次。有没有办法同时运行 foreach 循环？我希望它清楚谢谢！

$Logfile = "C:\NEW TEST 2\robocopylog.txt"

$sources = @("SCRIPT TEST","SCRIPT TEST 2")
$destinations = @("NEW TEST","NEWTESTT")

foreach ($source in $sources){
    foreach ($destination in $destinations){

        robocopy "C:\$source" "C:\$destination" /Z /W:5 /MIR /LOG+:$Logfile

}
}

解决方法

你可以使用 for 循环

$Logfile = "C:\NEW TEST 2\robocopylog.txt"

$sources = @("SCRIPT TEST","SCRIPT TEST 2")
$destinations = @("NEW TEST","NEWTESTT")

for($i = 0; $i -lt $sources.Count; $i++){
    Write-Host robocopy "C:\$($sources[$i])" "C:\$($destinations[0])" /Z /W:5 /MIR /LOG+:$Logfile
}

但我真的建议您重新考虑您的方法。我认为哈希表或 PSCustomObject 会是更合适的存储结构。

$paths = @{
    Source      = "SCRIPT TEST"
    Destination = "NEW TEST"
},@{
    Source      = "SCRIPT TEST 2"
    Destination = "NEWTESTT"
}

$paths.GetEnumerator() | ForEach-Object {
    Write-Host robocopy "C:\$($_.source)" "C:\$($_.destination)" /Z /W:5 /MIR /LOG+:$Logfile
}

或

$paths = [PSCustomObject]@{
    Source      = "SCRIPT TEST"
    Destination = "NEW TEST"
},[PSCustomObject]@{
    Source      = "SCRIPT TEST 2"
    Destination = "NEWTESTT"
}

foreach($path in $paths){
    Write-Host robocopy "C:\$($path.source)" "C:\$($path.destination)" /Z /W:5 /MIR /LOG+:$Logfile
}

,

我会通过索引来寻址数组，而不是使用 foreach 迭代器。然后将 $source[$i] 复制到 $destination[$i]，类似于：

if ($sources.length -ne $destinations.length) {
    throw "Number of sources does not match number of destinations" 
}

for ($i = 0; $i -lt $sources.Length; $i++) {
    "$($sources[$i]) -> $($destinations[$i])" 
}

第一个检查存在的原因很明显。在 robocopy 中交换应该是相当简单的。

,

如果您传递具有 2 个元素的数组并具有嵌套循环，这就是它的作用 - 它将为每个元素循环。

你想要的是一个二维数组和一个循环：

$sources = @( ("SCRIPT TEST","NEW TEST"),("SCRIPT TEST 2","NEWTESTT") )

foreach ($source in $sources)
{
    robocopy "C:\$($source[0])" "C:\$($source[1])" /Z /W:5 /MIR /LOG+:$Logfile
}