我将Syslog消息作为Heartbeat发送，并希望将日志文件显示为已排序的html（按主机和最新收到的心跳）。我的数组看起来像这样：
protocol HasNameProtocol {
associatedtype FetchableType: NSManagedObject = Self
static var entityName : String { get }
var name: String {get}
static func predicate(name: String) -> NSPredicate
static func find(name: String, context: NSManagedObjectContext) throws -> [FetchableType]
}
extension HasNameProtocol where FetchableType == Self {
static var entityName : String {
return NSStringFromClass(self).components(separatedBy: ".").last!
}
static func predicate(name: String) -> NSPredicate {
return NSPredicate(format: "name == %@", name)
}
static func find(name: String, context: NSManagedObjectContext) throws -> [FetchableType] {
let request = NSFetchRequest<FetchableType>(entityName: entityName)
let predicate = predicate(name: name)
request.predicate = predicate
return try context.fetch(request)
}
}
我不想要所有的消息，只是每个主机的最后一个消息。已经尝试过Get-Unique的许多版本; Sort-Object -unique等等但始终失败。
发布的输出由以下产生：
Date | Host
---- | ----
31.10.2017 16:59:37 | Host0815
31.10.2017 16:59:31 | Host2123
31.10.2017 16:59:31 | Host1
31.10.2017 16:59:31 | Host0815
31.10.2017 16:59:25 | Host0815
31.10.2017 16:59:25 | Host2123
31.10.2017 16:59:25 | Host1
31.10.2017 16:59:19 | Host0815
$array = $array | Sort-Object Host, Date -Unique | Sort-Object Date -Descending
开关似乎无效。此外，如果我尝试这样排序的独特主机我工作，但我有“随机”日期值，而不是每个最新的。
期望的输出：
-unique有人可以帮助我，甚至可以告诉我这是否可行？
谢谢！
负载线
答案 0 :(得分：1)
示例：
$list = @(
[PSCustomObject] @{
Date = [DateTime] "10/31/2017 16:59:37"
Host = "Host0815"
}
[PSCustomObject] @{
Date = [DateTime] "10/31/2017 16:59:31"
Host = "Host2123"
}
[PSCustomObject] @{
Date = [DateTime] "10/31/2017 16:59:31"
Host = "Host1"
}
[PSCustomObject] @{
Date = [DateTime] "10/31/2017 16:59:31"
Host = "Host0815"
}
[PSCustomObject] @{
Date = [DateTime] "10/31/2017 16:59:25"
Host = "Host0815"
}
[PSCustomObject] @{
Date = [DateTime] "10/31/2017 16:59:25"
Host = "Host2123"
}
[PSCustomObject] @{
Date = [DateTime] "10/31/2017 16:59:25"
Host = "Host1"
}
[PSCustomObject] @{
Date = [DateTime] "10/31/2017 16:59:19"
Host = "Host0815"
}
)
$list | Sort-Object Host -Unique | Sort-Object Date -Descending
输出：
Date Host
---- ----
10/31/2017 4:59:37 PM Host0815
10/31/2017 4:59:31 PM Host1
10/31/2017 4:59:31 PM Host2123
我创建了示例输入数据（$list），其中Date列是实际的[DateTime]对象。我不知道您的数据是否属于这种情况（您可能需要这样做），但我的简短测试会输出您期望的结果。
答案 1 :(得分：0)
首先：感谢您的所有时间！我试图调整你的例子并且它有效，只做了一个“改进”：
$list = @(
[PSCustomObject] @{
Date = [DateTime]::ParseExact("31.10.2017 16:59:37","dd.MM.yyyy HH:mm:ss", $null)
Host = "Host1234"
}...
也有效，非常好！但是现在我尝试将这些更改改编为我的脚本并再次失败：
$data = Get-Content "C:\heartbeat-log.txt" -tail 50
$array.Clear()
ForEach ($line in $data)
{
$string = ($line -split "SPACER,") -split ","
$array += @(
[PSCustomObject] @{
Date = [DateTime]::ParseExact($string[1], "dd.MM.yyyy HH:mm:ss", $null)
SN = [string]$string[2]
Host = [string]$string[3]
Msg = [string]$string[4]
Status = [string]$string[5]
CpuCores = [int]$string[6]
}
)
}
这就是我的输入数据的样子（SN因为随机创建的字符串而改变）：
SPACER,31.10.2017 21:03:23,MZ58XJ6UBH,Host1,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:03:23,MZ58XJ6UBH,Host2123,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:03:29,MZ58XJ6UBH,Host0815,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:03:29,MZ58XJ6UBH,Host1,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:03:29,MZ58XJ6UBH,Host2123,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:03:35,MZ58XJ6UBH,Host0815,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:03:35,MZ58XJ6UBH,Host1,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:03:35,MZ58XJ6UBH,Host2123,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:08:55,PKRTVWLOMJ,Host0815,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:08:55,PKRTVWLOMJ,Host1,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:08:55,PKRTVWLOMJ,Host2123,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:09:01,PKRTVWLOMJ,Host0815,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:09:01,PKRTVWLOMJ,Host1,CustomMsg,CustomStatus,2
SPACER,31.10.2017 21:09:01,PKRTVWLOMJ,Host2123,CustomMsg,CustomStatus,2
使用您的排序示例输出：
$array | Sort-Object Host -Unique | Sort-Object Date -Descending | ft
Date SN Host Msg Status CpuCores
---- -- ---- --- ------ --------
31.10.2017 21:03:23 MZ58XJ6UBH Host1 CustomMsg CustomStatus 2
31.10.2017 19:54:06 XM6YCR5ED2 Host2123 CustomMsg CustomStatus 2
31.10.2017 19:50:46 QJKWLD7901 Host0815 CustomMsg CustomStatus 2
期望：
Date SN Host Msg Status CpuCores
---- -- ---- --- ------ --------
31.10.2017 21:09:01 PKRTVWLOMJ Host1 CustomMsg CustomStatus 2
31.10.2017 21:09:01 PKRTVWLOMJ Host2123 CustomMsg CustomStatus 2
31.10.2017 21:09:01 PKRTVWLOMJ Host0815 CustomMsg CustomStatus 2
为什么“相同”数组在手动填充但不在我的版本中时有效？
（希望这次我的帖子格式正确;））
非常感谢！
答案 2 :(得分：0)
PowerShell的独特之处并不是为了解决这种复杂性。您可以先按主机分组，然后再按主机分类和选择：
$array | group Host | % {$_ | select -ExpandProperty group | sort Date -Descending | select -First 1}
Date Host
---- ----
31.10.2017 16:59:37 Host0815
31.10.2017 16:59:31 Host2123
31.10.2017 16:59:31 Host1