PowerShell 3 中引入了 -in 和-notin 运算符作为 -contains 和-notcontains 运算符的语法反转。 当左侧 -in 与集合中的一个元素匹配时, 返回<scalar-object>。而 -notin 返回False。 以下示例执行与 -contains 和-notcontains 示例相同的操作,但它们是用 -in 和-notin 编写的。 PowerShell 复制 "def"...
PowerShell 3 中引入了 -in 和-notin 运算符作为 -contains 和-notcontains 运算符的语法反转。 当左侧 -in 与集合中的一个元素匹配时, 返回<scalar-object>。而 -notin 返回False。 以下示例执行与 -contains 和-notcontains 示例相同的操作,但它们是用 -in 和-notin 编写的。 PowerShell...
compare two strings in if-then-else statement Compare two text files in Powershell and if a name is found in both files output content from file 2 to a 3rd text file Compare-Object : Cannot bind argument to parameter 'ReferenceObject' because it is null. Comparing 2 software versions to ...
Use comparison operators (-eq,-ne,-gt,-lt,-le,-ge) to compare values and test conditions. For example, you can compare two string values to determine whether they're equal. The comparison operators also include operators that find or replace patterns in text. The (-match,-notmatch,-repla...
To run a command that contains a space in its name, enclose its filename in singlequotes (‘) and precede the command with an ampersand (&)。例如:& ‘C:Program FilesProgramProgram.exe’ arguments 2. 用双引号意味着是表达式。例如:"C:Program FilesProgramProgram.exe" ...
compare two strings in if-then-else statement Compare two text files in Powershell and if a name is found in both files output content from file 2 to a 3rd text file Compare-Object : Cannot bind argument to parameter 'ReferenceObject' because it is null. Comparing 2 software versions to ...
Creates an object that contains advanced options for a session. Add-PSSnapin Adds one or more Windows PowerShell snap-ins to the current session. Get-PSSnapin Gets the Windows PowerShell snap-ins on the computer. Remove-PSSnapin Removes Windows PowerShell snap-ins from the current session. Compl...
Describes the operators that compare values in Windows PowerShell. about_Continue Describes theContinuestatement, which immediately returns to top of a program loop. about_Core_Commands Lists the cmdlets designed for use with Windows PowerShell providers. ...
Causes the parallel invocation to run as a PowerShell job. A single job object is returned instead of output from the running script blocks. The job object contains child jobs for each parallel script block that runs. You can use the job object with any of the PowerShell job cmdlets to ...
If you work with database types, you may get back a[dbnull]::Valuewhich is equivalent to$nullwithin the database, but in PowerShell, this was not equal to$nullso you can’t compare it directly. This change fromJoel Sallowallows you to compare both[dbnull]::Valueand[nullstring]::Valu...