PowerShell Script Blocks: Use Code as a First-Class Object
Script blocks are reusable code objects in PowerShell. Learn to create, invoke, pass as arguments, and use them with Invoke-Command and ForEach-Object.
PowerShell Parameters: Advanced Function Parameters Guide
Advanced function parameters make PowerShell scripts user-proof. Learn Mandatory, ValidateSet, parameter sets, and pipeline input with examples.
PowerShell Out-File vs Export-Csv vs Redirect: Save Output
Save any PowerShell output to a file with Out-File, Export-Csv, or redirection. Learn encoding, append mode, and when each method is best.
PowerShell ForEach-Object vs foreach Statement: Full Comparison
PowerShell has two ways to iterate: the foreach statement and ForEach-Object. Learn the real differences in performance, streaming, and pipeline use.
PowerShell Group-Object: Group and Count Pipeline Data
Group-Object groups pipeline objects by any property and counts each group. Learn to build frequency reports and analyze data patterns.
PowerShell Measure-Object: Count, Sum, and Average Data
Measure-Object aggregates pipeline data with sum, average, min, max, and count. Learn to use it for disk reports, word counts, and number stats.
PowerShell Enum and Constants: Define Fixed Value Sets
Enums enforce valid values in PowerShell scripts. Learn to use built-in .NET enums, define custom enums, and validate parameters with them.
PowerShell Null Handling: $null, -eq $null, and Null Coalescing
Null values cause unexpected errors in scripts. Learn to check for null, use null coalescing in PowerShell 7, and handle missing data safely.
PowerShell Type Casting and Type Conversion Examples
PowerShell’s flexible typing can cause silent bugs. Learn to explicitly cast types, use the safe -as operator, and convert dates and numbers.
PowerShell PSCustomObject: Build Custom Output Objects
PSCustomObject lets you build structured objects in PowerShell for clean function output and pipeline compatibility. Learn creation patterns and examples.
