PowerShell 複製 if ( $null -eq $array ) { 'Array actually is $null' } $null 陣列與空陣列不同。 如果您知道您有陣列,請檢查其中的物件計數。 如果陣列是 $null,則計數是 0。PowerShell 複製 if ( $array.Count -gt 0 ) { "Array isn't empty" } 這裡有一個
Test-MrSupportsShouldProcess [[-ComputerName] <Object>] [-WhatIf] [-Confirm] [<CommonParameters>] 同样,也可以使用 Get-Command 返回实际参数名称的列表,包括常用参数名称以及 WhatIf 和Confirm。 PowerShell 复制 (Get-Command -Name Test-MrSupportsShouldProcess).Parameters.Keys Output 复制 Computer...
ValidateSetAttribute:限制变量的取值集合 ValidateNotNullAttribute 例子 ValidateNotNullOrEmptyAttribute 例子,注意@()为一个空数组。
() }$groupResult=$groupResult|Sort-ObjectTotalMilliseconds$groupResult|Select-Object*, @{ Name ='RelativeSpeed'Expression = {$relativeSpeed=$_.TotalMilliseconds /$groupResult[0].TotalMilliseconds$speed= [Math]::Round($relativeSpeed,2).ToString() +'x'if($speed-eq'1x') {$speed}else{$speed+...
powerline 字体letg:airline#extensions#tabline#enabled=1""显示窗口tab和buffer"let g:airline_theme='moloai' "murmur配色不错if!exists('g:airline_symbols')letg:airline_symbols={}endifletg:airline_left_sep='▶'letg:airline_left_alt_sep='❯'letg:airline_right_sep='◀'letg:airline_right_alt...
vtEmpty, 对其调用指定成员的对象 psaStaticMethodArgs, 包含传递给要调用的成员的参数的数组 &vtPSInvokeReturnVal); 表示要使用的全局化区域设置的对象,它对区域设置特定的转换可能是必需的,比如将数字 String 转换为 Double。 if (FAILED(hr)) { wprintf(L"Failed to invoke InvokePS w/hr 0x%08lx\n", ...
Not bad, not bad at all. Here’s another simple example, one that shows how you might use this menu system to repeatedly prompt the user to take some action. This script writes the values 1 through 10 to the screen, then asks the user if he or she would like to quit. If the use...
Use a Conditional Statement to Check if a String Variable Is Not Null or Empty in PowerShell We have created a string variable,$string. $string="Hello World" The following example checks if a$stringvariable is null or not in PowerShell. It returns the first statement if the variable is ...
Check if .txt file is empty Check if a process is running check if a process or service is hanging/not responding? Check if a text file is blank in powershell check if computer exist in ou Check if drive exists, If not map Check if Email address exists in Office 365 and if exists,...
Verify that a password is set on the workgroup-based computer. If a password is not set or the password value is empty, you cannot run remote commands. Use theCredentialparameter in all remote commands. This is required even when you connect as the current user. ...