Build a PowerShell pipeline and inspect every stage
Documentation: Microsoft Learn
Build a pipeline, then step through it. The inspector uses a fixed fictional dataset so every stage is visible and repeatable.
Mental model
Objects move left to right
The pipe passes objects, not formatted text. A filter removes objects, a sort reorders them, and Select-Object can trim or reshape the result.
Interactive pipeline inspector
See the input and output at every stage
Change the controls, then use Step or Play. Rows that fail the current pipeline fade on the left; returned objects stay highlighted on the right.
Before · source objects
After · returned objects
1$objects = source command
2$objects = $objects | Where-Object ...
3$objects = $objects | Sort-Object ...
4$result = $objects | Select-Object -First ...
Live values
- $objects.Count
- 0
- after filter
- —
- sort property
- —
Genie: press Step to inspect one stage, or Play to watch the whole pipeline.
What to notice
- Filtering changes membership: some objects disappear.
- Sorting changes order: the same objects can move without losing their properties.
- Display is not the object: a table shows selected properties; the object can carry more.
- Format last: keep real objects until you actually need human-facing text.
Open Object Explorer to see the properties a displayed row hides.
