Where-Object
Where-Object is a PowerShell cmdlet that filters pipeline objects according to specified properties, conditions, or criteria.
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Where-Object is a PowerShell cmdlet that filters objects in the pipeline according to specified criteria.
- How it is used
- Filters retrieved pipeline objects when an upstream cmdlet cannot express all required criteria.
- How deep it goes
- Explains per-object evaluation, comparison syntax, $_, nested pipelines, property names, and iterative construction without descending into implementation internals.
- Examples
- Demonstrates process, file, module, date, event-log, regex, and nested-content filters.
- What you can do after
- Apply it via PowerShell pipelines to retain objects matching property comparisons, wildcard tests, compound conditions, or regular expressions.
Practical Automation with PowerShell: Effective scripting from the console to the cloud
Where-Object is a PowerShell cmdlet that filters objects in a pipeline according to a specified condition.
- How it is used
- Filters pipeline objects for operational selection, while steering source-level filtering when available for efficiency.
- How deep it goes
- Explains pipeline-by-pipeline filtering costs and demonstrates property conditions in disk and VHD automation.
- Examples
- Demonstrates filtering SQL results, locating a VHD by Path, selecting raw disks, and limiting a file watcher to XML files.
- What you can do after
- Apply it to select pipeline objects by properties while choosing earlier cmdlet or SQL filters for high-volume retrieval.
Related concepts
- monitoringuses · Monitoring is the ongoing observation and measurement of a system’s behavior, state, or operational signals to assess its condition and detect changes or problems.
- Select-Objectcontrasts with · Select-Object is a PowerShell cmdlet that selects properties or creates customized objects from input objects.
- filteringkind of · Filtering is the operation of selecting or excluding items from data or a collection according to specified criteria.
- cmdletkind of · A cmdlet is a specialized PowerShell command, typically implemented as a .NET class, that performs a focused operation.
- aliasalternative to · An alias is an alternative name by which an entity, command, parameter, or resource can be referred to.
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