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...
function inc ([parameter(ValueFromPipeline)]$x) {return $x + 1} Write-Host (3 | inc) #输出为:4 五、使用引用 函数参数可使用引用类型,使用引用类型之后便可以在函数中修改外部变量的数值。 在参数前使用[ref]指定使用引用类型。如function f ([ref]$x)。传参时,要求把传入数值转换为引用类型,转换...
functionInvoke-CmdScript{ param( [String]$scriptName ) $cmdLine="""$scriptName""$args& set" &$Env:SystemRoot\system32\cmd.exe /c$cmdLine| select-string'^([^=]*)=(.*)$'|foreach-object{ $varName=$_.Matches[0].Groups[1].Value $varValue=$_.Matches[0].Groups[2].Value set-itemE...
A function can also be as complex as a cmdlet. 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...
function Test-MrErrorHandling { [CmdletBinding()] param ( [Parameter(Mandatory, ValueFromPipeline, ValueFromPipelineByPropertyName)] [string[]]$ComputerName ) process { foreach ($Computer in $ComputerName) { Test-WSMan -ComputerName $Computer } } } There are a couple of different ways to...
Return an arrayThis unwrapping of arrays also happens when you output or return values from a function. You can still get an array if you assign the output to a variable so this isn't commonly an issue.The catch is that you have a new array. If that is ever a problem, you can use...
#然后火绒会对这个powershell执行脚本的行为进行行为拦截#echo ... | powershell 也会被拦截powershell#从cmd进入powershell界面functionConvertFrom-Base64($string){$bytes= [Sys;tem.Convert]::FromBase64String($string);$decoded= [System.Text.Encoding]::UTF8.GetString($bytes);return$decoded;}$a="cG93...
$[<scope-modifier>:]<name> = <value> 函式中範圍修飾詞的語法如下: function [<scope-modifier>:]<name> {<function-body>} 下列命令不使用範圍修飾詞,會在目前或本機範圍中建立變數: PowerShell $a="one" 若要在全域範圍中建立相同的變數,請使用範圍global:修飾詞: ...
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outside function: LiMing新创建的变量会在当前作用域中覆盖之前传递的参数,原参数值不变,为改变传递到函数中的参数值,可以使用Get-Variable和Set-Variable在复杂的作用域间更改变量值。下例创建的函数用来交换两个变量值:展开表 PS C:\> function SwapValue($first, $second) >> { >> $firstValue = Get-...