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> $data.count 4 PowerShell 3.0 向大多数对象添加了计数属性。 你可以使用单个对象,它应该...
functionTest-Return{$array=1,2,3return(,$array) }Test-Return|Measure-Object Output Count : 1 Average : Sum : Maximum : Minimum : Property : Write-Output具有NoEnumerate参数。 还可以将Write-Outputcmdlet 与NoEnumerate参数一起使用。 以下示例使用Measure-Objectcmdlet 对关键字 (keyword) 从示例函数发...
To create a strongly typed array, that is, an array that can contain only values of a particular type, cast the variable as an array type, such as string[], long[], or int32[]. To cast an array, precede the variable name with an array type enclosed in brackets. For example:Power...
IAssociativeArray<T>.Count Property Reference Feedback Definition Namespace: Microsoft.Azure.PowerShell.Cmdlets.Orbital.Runtime Assembly: Az.Orbital.private.dll C# 复制 public int Count { get; } Property Value Int32 Applies to 产品版本 Azure - PowerShell Commands 12 (LTS), Lat...
Incidentally, you can determine the number of items in an array simply by echoing back the value of theCountproperty, like so: $a.Count Oh, one more thing: what if you to get rid ofallthe items in the array? Here’s one thought; call theClearmethod: ...
Accessing Values in an Array Byte Conversion Calculating Text File Statistics Creating Custom Tables Displaying Version Properties of a Group Policy Object Even More Things You Can Do With Arrays Formatting Dates and Times Formatting Numbers Fun Things You Can Do With the Get-ChildItem Cmdlet ...
In the output, the Count column contains the total number of each event. The Name column contains the grouped event Id numbers. The $Event variable is sent down the pipeline to the Group-Object cmdlet. Group-Object uses the Property parameter to specify the LevelDisplay...
While they are replaced with the actual values in the message text, a more robust way to access them is to retrieve the message with the Get-WinEvent cmdlet, and then use the Properties array of the message. Here’s an example of how this functionality can help unwrap a malicious attempt...
One of the big problems we have had in the language has been not knowing whether the following expression was going to return a single element or an array: $x = gps $name We fixed this longstanding problem by masking over the issue allow...
A set of PowerShell functions you might use to enhance your own functions and scripts or to facilitate working in the console. Most should work in both Windows PowerShell and PowerShell 7, even cross-platform. Any operating system limitations should be h