Curly brackets

16 Mar 2025 - jhunter

Source

help about_Script_Blocks

wikipedia.org

Command

$variable1 = { $scriptblock1 }

Definition

The curly brackets { and } (also known as “braces”) can be used to define a block of script inside a PowerShell variable.

This is handy if you want to:

• Build a block of script and re-use it;
• Or programmatically build a block of script inside your code.

How to build an expression

In the PowerShell, define a block of script like in this example:

$year = 2025
$myscriptblock1 = {get-childitem | Where-Object { (get-date($_.lastwritetime)).year -eq $year }}

Note that this is not a string of text. Verify this fact with the following command:

PS C:\> $myscriptblock1 | Get-Member


   TypeName : System.Management.Automation.ScriptBlock

<output omitted>

Run a script block variable

Here are two handy ways to run a block of script:

Use dot notation:

. $myscriptblock1

Use the ìnvoke-command command:

invoke-command -scriptblock $myscriptblock1