Question

How do I Start a job of a function i just defined?

function FOO { write-host "HEY" }

Start-Job -ScriptBlock { FOO } |
  Receive-Job -Wait -AutoRemoveJob

Result:

Receive-Job: The term 'FOO' is not recognized as the name of cmdlet,
function ,script file or operable program.

What do I do?
Thanks.

Answer 1

As @Shay points out, FOO needs to be defined for the job. Another way to do this is to use the -InitializationScript parameter to prepare the session.

For your example:

$functions = {
    function FOO { write-host "HEY" }
}

Start-Job -InitializationScript $functions -ScriptBlock {FOO}|
    Wait-Job| Receive-Job

This can be useful if you want to use the same functions for different jobs.