Custom object

Q: How deeply does Learn PowerShell in a Month of Lunches: Fourth Edition, Covers Windows, Linux, and macOS cover custom object?

Explains property selection, PSObject formatting, and value extraction, but stops short of constructing custom objects manually.

As explained in Learn PowerShell in a Month of Lunches: Fourth Edition, Covers Windows, Linux, and macOS

PSCustomObject is a PowerShell wrapper object type that exposes a selected set of properties.

A custom object is a PowerShell object containing only the properties you choose. Select-Object creates one when trimming a richer object, preserving property boxes while changing the object type. section 8.8 section 10.8

Select process properties

Run Get-Process | Sort-Object CPU -Descending | Select-Object Name,ID,CPU. The pipeline now contains custom objects rather than process objects, so PowerShell formats the output using its general PSObject rules. section 8.8

A custom object still contains properties. To retrieve a property's value instead of another object containing that property, use Select-Object -ExpandProperty. For example, expanding ResourceGroupName returns strings that another command can accept. section 10.8

How Learn PowerShell in a Month of Lunches: Fourth Edition, Covers Windows, Linux, and macOS covers it

Cover of Learn PowerShell in a Month of Lunches: Fourth Edition, Covers Windows, Linux, and macOS

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Related concepts

serializationused by · Serialization is the encoding of structured data or in-memory values into a representation suitable for storage or transmission and later reconstruction.
Mapuses · A map is an associative data structure that stores key-value pairs and supports retrieving values by key.
Select-Objectproduced by · Select-Object is a PowerShell cmdlet that selects properties or creates customized objects from input objects.
Objectkind of · java.lang.Object is the root class of Java’s reference-type hierarchy and defines methods inherited by Java reference types.
parameter splattingproduced by · Parameter splatting is a PowerShell feature that supplies multiple command parameter names and values from a collection as invocation arguments.

This explainer was generated by Manning's knowledge graph from the text of Learn PowerShell in a Month of Lunches: Fourth Edition, Covers Windows, Linux, and macOS. The section links point to the parts of the book it draws on.