whats the purpose of this line?

if ($me = $me) {

and this?

 if $($+(%,sent,.,$chan),2) { return }

tip

alias slapall {
  $iif($active == Status Window, echo -ag you need to be in a channel)
  var %x = $regsubex($str($chr(32),$nick(#,0)),//g,$iif($nick(#,\n) != $me,$nick(#,\n)))
  tokenize 32 %x
  describe # 12,1--->0,1 Slaps the crap out of $* with a larger than ordinary12,1,0,1 non12,1-0,1standard12,1,0,1 frames compatible12,1,0,1 Microsoft trout12,112.
}