-contains The -contains operator checks the collection for your value. As soon as it finds a match, it returns $true. PowerShell Copy $array = 1..6 if ( $array -contains 3 ) { # do something } This is the preferred way to see if a collection contains your value. Using Where-...
However, if I only want to check and run code for invalid integers (doing nothing for valid ones), the following IF statement returns nothing regardless of the $value’s value: PS>$value = "abc" PS>if(isInt($value) -eq $false){ write-output "Invalid" } PS> Yet just running the ...
Check if HyperThreading is enabled Check if IIS running on a remote server check if object is $null Check if OS is 32bit or 64bit check If Process Is Running in another computer Check if SMB1 is enabled on the AD servers Check if string contains invalid characters Check if string starts...
# This statement returns true because book contains the string "oo"'book'-match'oo' 字符类 虽然字符文本在知道确切的模式时工作,但字符类允许你不太具体。 字符组 [character group]允许一次匹配任意数量的字符,而[^character group]仅匹配组中的字符。
The function contains two commands. The$PSHelpvariable stores the path to the PowerShell help files.$PSHOMEis the PowerShell installation directory with the subdirectoryen-USthat specifies each*.txtfile in the directory. TheSelect-Stringcommand in the function uses thePathandPatternparameters. ThePa...
If the function has aprocesskeyword, each object in$inputis removed from$inputand assigned to$_. The following example has aprocessstatement list: PowerShell functionGet-PipelineInput{process{"Processing:$_"}end{"End: The input is:$input"} } ...
match, theGet-ChildItemcommand returns nothing and assigns nothing to$textFiles, which is considered$falsein a boolean context. If one or moreFileInfoobjects are assigned to$textFiles, the conditional evaluates to$true. You can work with the value of$textFilesin the body of theifstatement. ...
It’s important to note that the Contains method always does a case-sensitive search; if we looked for the stringRIPT, Contains would tell us that this text couldnotbe found. What if we don’t care about letter case, and only care about the actual characters themselves? Well, one way ...
Well, in a VBScript Select Case statement once a true condition has been encountered the script exits Select Case; it doesn’t continue checking all the other conditions. That isn’t necessarily true in Windows PowerShell. PowerShell checked to see if $a contains 5 consecutive digits; because...
Useful methods on the String class Introduction to Regular Expressions The Select-String cmdlet Part 2: The -split operator The -match operator The switch statement The Regex class Part 3: A real world, complete and slightly bigger, example of a switch-based parser ...