What is Where-Object in PowerShell?
Overview
The Where-Object cmdlet is used to filter the resulting data through a pipeline.
Syntax
We'll call Where-Object after the | pipe operator. We can access the current object in the script block using $_:
Where-Object { condition }
Parameter
This command does not take any parameters. It only accepts conditions to filter the output data from the pipeline.
Return value
This method returns the filtered data.
Code example
In the following example, we'll filter the students who have more than five character lengths in their names.
#!/usr/bin/pwsh -Command#given array of students$students = @('Daniel', 'Westin', 'Tadeo', 'Hezekiah')#filter students using Where-Object$students | Where-Object { $_.Length -gt 5}
Code explanation
In the above code snippet:
- Line 4: We declare and initialize an array named
students. - Line 7: We filter out the students whose name length is greater than five characters using
Where-Object. We access the current object using$_and get the length using the in-builtLengthproperty, and we compare it using the comparison operator called-gt.
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