I looked this up yesterday. Dialog version 13 introduced the use of the tack as identity and repurposed + as conjugate. (Actually, they bound both left and right tacks identically, even though they call left tack "same" and right tack "identity".) If the argument of conjugate is imaginary, conjugate returns the number with the imaginary part negated. If the argument of conjugate is real or non-numeric, conjugate returns the argument unchanged.
From: Juergen Sauermann <juergen.sauerm...@t-online.de> > To: "Elias Mårtenson" <loke...@gmail.com> > Cc: "bug-apl@gnu.org" <bug-apl@gnu.org> > Date: Tue, 01 Jul 2014 17:04:24 +0200 > Subject: Re: [Bug-apl] Identify function > Hi Elias, > > I looked in "Mastering APL" from Dyalog and could not find it. > They call + the identity function. > > And what would be the use of it? > > /// Jürgen > > -- "The secret to creativity is knowing how to hide your sources." Albert Einstein http://soundcloud.com/davidlamkins http://reverbnation.com/lamkins http://reverbnation.com/lcw http://lamkins-guitar.com/ http://lamkins.net/ http://successful-lisp.com/
