Functions can return values that can be displayed, assigned to variables, or passed to other functions or cmdlets. You can use thereturnkeyword to return output. Thereturnkeyword doesn't affect or suppress other output returned from your function. However, thereturnkeyword exits the function at ...
function Test-MrParameterValidation { [CmdletBinding()] param ( [Parameter(Mandatory)] [string[]]$ComputerName ) Write-Output $ComputerName } Maybe you want to specify a default value for the ComputerName parameter if one isn't specified. The problem is that default values can't be used ...
functionglobal:Hello {Write-Host"Hello, World"} 您也可以使用範圍修飾詞來參考不同範圍中的變數。 下列命令是指$test變數,先在本機範圍,然後在全域範圍中: PowerShell $test$global:test using:範圍修飾詞 Using 是特殊的範圍修飾詞,可識別遠端命令中的局部變數。 如果沒有修飾詞,PowerShell 預期遠端命令中的...
Hashtable 項目會儲存在類型為 DictionaryEntry的物件中,而 Keys 和 Values 所傳回的集合具有類型 ICollection。 4.3.4 xml 類型 類型xml 會實作 W3C 檔案物件模型 (DOM) 層級 1 核心和核心 DOM 層級 2。 DOM 是 XML 文件在記憶體中的樹狀結構表示,方便對該文件進行導覽和編輯。 此類型支援註標運算符 [] (...
functionGet-SumOfNumbers{ [CmdletBinding()]param( [Parameter(Mandatory, Position=0, ValueFromPipeline)] [int[]]$Numbers)begin{$retValue=0}process{foreach($nin$Numbers) {$retValue+=$n} }end{$retValue} } PS>Get-SumOfNumbers1,2,3,410PS>1,2,3,4|Get-SumOfNumbers10 ...
Return Values in the Pipeline in PowerShell When you return a value from your script block or function, Windows PowerShell automatically pops the members and pushes them one at a time through the pipeline. The reason behind this use case is due to Windows PowerShell’s one-at-a-time proces...
When an object isn't an indexed collection, using the index operator to access the first element returns the object itself. Index values beyond the first element return$null. PowerShell PS> (2)[0]2PS> (2)[-1]2PS> (2)[1]-eq$nullTrue PS> (2)[0,0]-eq$nullTrue ...
return $false } Finally { $Connection.close() } } return $true } Function ExecuteNonQuery_change_info(){ param( [string]$S_ConnStr=$null, [string]$T_ConnStr=$null ) [string]$S_Sql="SELECT `id`, `name` FROM tab;" [string]$T_Sql="INSERT INTO tab_test(`id`, `name`)VALUES(@...
Second named argument is: 2 First positional function argument is: One Second positional function argument is: Two First named scriptblock argument is: One Second named scriptblock argument is: 4 通过此例来分析script 和function的关系。 Script由普通的Function以及其他的逻辑语句(顺序、选择、循环)组成...
As with cmdlets,functions can use parametersand return values that can be passed to other functions or cmdlets. By describing a parameter to the shell, admins can use any type of PowerShell parameters, such as named parameters, mandatory parameters and positional PowerShell parameters. ...