Question

How do I convert function input parameters to the right type?

I want to return a string that has part of the URL passed into it removed.

This works, but it uses a hard-coded string:

function CleanUrl($input) {     $x = 'http://google.com'.Replace('http://', '')     return $x }  $SiteName = CleanUrl($HostHeader) echo $SiteName 

This fails:

function CleanUrl($input) {     $x = $input.Replace('http://', '')     return $x }  Method invocation failed because [System.Array+SZArrayEnumerator] doesn't contain a method named 'Replace'. At M:\PowerShell\test.ps1:13 char:21 +     $x = $input.Replace( <<<< 'http://', '') 

Answer 1

The concept here is correct.

The problem is with the variable name you have chosen. $input is a reserved variable used by PowerShell to represent an array of pipeline input. If you change your variable name, you should not have any problem.

PowerShell does have a replace operator, so you could make your function into

function CleanUrl($url) {     return $url -replace 'http://' }