the array class built into Windows PowerShell does have at least one weakness: as easy as it might be to add a new item to an array, there’s no comparably-easy way to remove an existing item from an array. That’s a shame, but, then again, that’s just the way it goes. After...
PS> $empty = $null PS> $empty[0] Error: Cannot index into a null array. 因此,在尝试访问数组中的元素之前,请确保数组不是 $null。Count数组和其他集合具有计数属性,可告知数组中有多少项。PowerShell 复制 PS> $data.count 4 PowerShell 3.0 向大多数对象添加了计数属性。 你可以使用单个对象,它应该...
Windows PowerShell Tip: Working With Custom Objects Windows PowerShell Tip: Working With SIDs Windows PowerShell Tip: Working With Security Descriptors Working with Hash Tables Accessing WMI from Windows PowerShell Hip, Hip, Array—Retrieving Multi-Valued WMI Properties from Windows PowerShell Do Scri...
$drives|Select-Object-PropertyName, @{n='TotalSpaceGB';e={($_.Used +$_.Free) /1GB}} 我個人不喜歡這樣讓命令變得冗長,它經常引發一些我不願深入討論的不良行為。 我更可能建立一個包含我想要的所有字段和屬性的新的哈希表或pscustomobject,而不是在腳本中使用此方法。 但有許多程式代碼可以這麼做,所...
Selects objects from indexed collections, such as arrays and hash tables. Array indexes are zero-based, so the first object is indexed as[0]. You can also use negative indexes to get the last values. Hash tables are indexed by key value. ...
In the following example $a is an array of objects.PowerShell Copy $a = 1, 2, 3 $a.Clear() $a | % { $null -eq $_ } Output Copy True True True In this example, $intA is explicitly typed to contain integers.PowerShell Copy ...
$SqlString = "select top 5 name from sys.databases " $SqlString2 = "select top 5 name from sys.objects " $SqlConn = GetSqlConnection $SQLIP $SQLPort $SQUser $SQLPwd "master" $Data = ExecuteSQL $SqlConn $SqlString $Data2 = ExecuteSQL $SqlConn $SqlString2 ...
The code to create the array of strings and select unique strings from the array, and the associated output are shown in the image that follows. Well, that is about all there is to selecting unique objects from a list. There are three ways to do this: use the Get-Unique cmdlet, use ...
creating custom objects from array Creating hash table with more than two columns Creating Local (non-domain) admin user on remote computers Creating Nested Groups Using PowerShell Creating new Aliases for all users and future users in O365 Creating user from template in powershell - Server 2012...
function in a pipeline, the objects piped to the function are assigned to the$inputautomatic variable. The function runs statements with thebeginscript block before any objects come from the pipeline. The function runs statements with theendscript block when there are no more objects in the ...