Dymanically generate a function in Powershell

GenerateFunction.ps1

function GenerateFunction($functionName, $codeBlock)
{
	$argList = ""
	
	foreach($argName in $args)
	{
		if($argList.Length -gt 0)
		{
			$argList += ","
		}
		$argList += "`$" + $argName
	}

	$newFunc = 
@"
		function global:$functionName($argList)
		{
			$codeBlock
		}
"@
	Invoke-Expression $newFunc
}

GenerateFunction myfunc -codeBlock {echo "hello"}
# PS> myfunc
# hello

GenerateFunction myAdd -codeBlock {$a + $b} a b
# PS> myAdd 1 2
# 3