Exactly, and since an identity function is useful it makes sense to map it to the same symbol as Dyalog.
Regards, Elias On 2 July 2014 00:55, David Lamkins <da...@lamkins.net> wrote: > Digging further, it's interesting to note that ISO APL defines + as > conjugate, but does not have a binding for the identity function. > > > On Tue, Jul 1, 2014 at 9:42 AM, David Lamkins <da...@lamkins.net> wrote: > >> 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/ >> > > > > -- > "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/ >
