powershell/PSUseLiteralInitializerForHashtable

powershell/PSUseLiteralInitializerForHashtable is a PSScriptAnalyzer diagnostic emitted by tally for PowerShell snippets embedded in Dockerfiles.

Property	Value
Severity	Warning
Category	PSScriptAnalyzer
Auto-fix	No

Description

Creating a hashtable using [hashtable]::new() or New-Object -TypeName hashtable without passing a IEqualityComparer object to the constructor creates a hashtable where the keys are looked-up in a case-sensitive manner. However, PowerShell is case-insensitive in nature and it is best to create hashtables with case-insensitive key look-up. This rule is intended to warn the author of the case-sensitive nature of the hashtable when created using the new method or the New-Object cmdlet.

How to Fix

Create the hashtable using a literal hashtable expression.

Examples

Problematic code (`[hashtable]::new()`)

$hashtable = [hashtable]::new()

Problematic code (`New-Object`)

$hashtable = New-Object -TypeName hashtable

Correct code

$hashtable = @{}

Source

This rule documentation is adapted from Microsoft’s PSScriptAnalyzer documentation for UseLiteralInitializerForHashtable, licensed under CC BY 4.0.

​Description

​How to Fix

​Examples

​Problematic code ([hashtable]::new())

​Problematic code (New-Object)

​Correct code

​Source