Could someone explain this autohotkey script to me? - autohotkey

Question

It's supposed to let me turn a toggle a run button on and off in a game (instead of having to hold it down). It works, but I'd like to know how.
$w:: Gosub, AutorunToggleME2
~s:: Gosub, AutoRunOffME2
AutorunToggleME2:
toggle := !toggle
Send % "{w " . ((Toggle) ? ("down") : ("up")) . "}"
return
AutoRunOffME1:
toggle = ; Off
Send {w up}
return
Specifically, I'd like what the following lines do:
Send % "{w " . ((Toggle) ? ("down") : ("up")) . "}"
Send {w up}

Answer 1

The code is pretending to hold down w. The basic Send syntax is explained here.
To hold down or release a key: Enclose in braces the name of the key
followed by the word Down or Up. For example:
Send {b down}{b up}
Send {TAB down}{TAB up}
Send {Up down} ; Press down the up-arrow key.
Sleep 1000 ; Keep it down for one second.
Send {Up up} ; Release the up-arrow key.
So this line:
Send {w up}
Clearly is releasing w.
The other line is more complicated:
Send % "{w " . ((Toggle) ? ("down") : ("up")) . "}"
You can find explanations of the relevant syntax here.
Basically:
% says that the following text is an expression.
The . is a string-concatenation operator.
This part ((Toggle) ? ("down") : ("up")) is the conditional operator (a.k.a ternary operator). It's shorthand for an if/else statement. In this case, when Toggle is true, it returns "down", otherwise it returns "up".
This works out to either Send {w down} or Send {w up} depending on the value of Toggle (true or false)