Question

我有（又一个）powershell查询。我在powershell中有一个数组，我需要使用remove（）和split命令。

通常设置数组（或变量）并存在上述方法。在下面的$ csv2数组中，两个方法都缺失，我已经使用get-member cmd进行了检查。

我怎样才能使用remove来摆脱nan的线条。另外，我如何将列拆分为两个不同的变量。目前，数组的每个元素都显示一行，我需要将每行转换为两个变量，每列一个。

时间戳利用率
--------- -----------
1276505880 2.0763250000e + 00
1276505890 1.7487730000e + 00
1276505900 1.6906890000e + 00
1276505910 1.7972880000e + 00
1276505920 1.8141900000e + 00
1276505930南
1276505940南
1276505950 0.0000000000e + 00

$SystemStats = (Get-F5.iControl).SystemStatistics     
$report = "c:\snmp\data" + $gObj + ".csv"

### Allocate a new Query Object and add the inputs needed
$Query = New-Object -TypeName iControl.SystemStatisticsPerformanceStatisticQuery
$Query.object_name = $i
$Query.start_time = $startTime
$Query.end_time = 0
$Query.interval = $interval
$Query.maximum_rows = 0 

### Make method call passing in an array of size one with the specified query
$ReportData = $SystemStats.get_performance_graph_csv_statistics( (,$Query) )

### Allocate a new encoder and turn the byte array into a string
$ASCII = New-Object -TypeName System.Text.ASCIIEncoding
$csvdata = $ASCII.GetString($ReportData[0].statistic_data) 

$csv2 = convertFrom-CSV $csvdata

$csv2

Answer 1

.NET的Remove类型没有Split或Array方法，或者由Array实例的PowerShell包装器添加。这很容易展示：

PS[64bit] E:\> $a = 1,2,3,4,5
PS[64bit] E:\> $a.GetType()

IsPublic IsSerial Name                                     BaseType
-------- -------- ----                                     --------
True     True     Object[]                                 System.Array


PS[64bit] E:\> Get-Member -InputObject $a


   TypeName: System.Object[]

Name           MemberType    Definition
----           ----------    ----------
Count          AliasProperty Count = Length
Address        Method        System.Object&, mscorlib, Version=2.0.0.0, Culture=neutral, PublicK...
Clone          Method        System.Object Clone()
CopyTo         Method        System.Void CopyTo(array array, int index), System.Void CopyTo(arra...
Equals         Method        bool Equals(System.Object obj)
Get            Method        System.Object Get(int )
GetEnumerator  Method        System.Collections.IEnumerator GetEnumerator()
GetHashCode    Method        int GetHashCode()
GetLength      Method        int GetLength(int dimension)
GetLongLength  Method        long GetLongLength(int dimension)
GetLowerBound  Method        int GetLowerBound(int dimension)
GetType        Method        type GetType()
GetUpperBound  Method        int GetUpperBound(int dimension)
GetValue       Method        System.Object GetValue(Params int[] indices), System.Object GetValu...
Initialize     Method        System.Void Initialize()
Set            Method        System.Void Set(int , System.Object )
SetValue       Method        System.Void SetValue(System.Object value, int index), System.Void S...
ToString       Method        string ToString()
IsFixedSize    Property      System.Boolean IsFixedSize {get;}
IsReadOnly     Property      System.Boolean IsReadOnly {get;}
IsSynchronized Property      System.Boolean IsSynchronized {get;}
Length         Property      System.Int32 Length {get;}
LongLength     Property      System.Int64 LongLength {get;}
Rank           Property      System.Int32 Rank {get;}

.NET和PowerShell中的数组是固定大小的。要删除元素，您需要复制除要移除的元素之外的所有元素，在PSH中可以使用Where-Object完成：

$newArray = $oldArray | Where-Object {some-condition-on-$_}

同样，带有Select-Object和-First参数的-Skip可用于在索引之前或之后（相反地）选择元素。

NB System.Array确实实施了System.Collections.ILst，但明确实施IList.Remove只会引发NotImplementedException。

powershell缺少数组中的成员方法

1 个答案: