Why doesn't $hash.key syntax work inside the ExpandString method?

Question

The following Powershell script demonstrates the issue:

$hash = @{\'a\' = 1; \'b\' = 2}
Write-Host $hash[\'a\']        # => 1
Write-Host $hash.a                   


        

Answer 1

I use this method, since this bug exists in v4 (not in v5)

function render() {
    [CmdletBinding()]
    param ( [parameter(ValueFromPipeline = $true)] [string] $str)

    #buggy
    #$ExecutionContext.InvokeCommand.ExpandString($str)

    "@`"`n$str`n`"@" | iex
}

Usage for your example:

  '$($hash.a)' | render