Ian
The needed ASCII expresssion is:
suits =: 4 u: 9827 9830 9829 9824
I wrote that expresssion in Endnote[7] with a reference to
Playing Cards in Wikipedia.
(#,$) suits NB. not 12!
4 4
To insert playing cards symbols under Windows, one can use
the MS supplied Character Table ("Table des caractères"
on my French-Can system). There are javascript browsers for use
with any Internet browser supporting Unicode such as
http://www.soldin.de/about/2003-js_unibook/
The problem is to find the category; with that particular one,
the Playing cards are in Miscellaneous Symbols.
~ Gilles
---------- Original Message -----------
From: Ian Clark <[email protected]>
To: Programming forum <[email protected]>
Sent: Sun, 6 Sep 2009 02:07:48 +0100
Subject: [Jprogramming] How do I enter a Unicode char in the J session?
> Edn 2 (draft) of APWJ by Eugene McDonnell (p280) invites readers to
> enter the expression:
>
> suits=: 7&u: '♣♦♥♠'
>
> For readers of the ebook version, this expression copy/pastes nicely
> into the J session and behaves as expected.
>
> But novice readers of the paperback version may wonder how they can
> be expected to type ♣♦♥♠ without having keytops labelled ♣,
> ♦, ♥ and ♠. Short of directing readers to
> http://unicode.org/charts/ and inviting them to hunt/copy/paste ♣
> etc (and I wouldn't know where to start looking... what alphabet is
> it, please?), I don't know how to answer this
> (a) succintly in the present example, eg to assign (suits=:...)
> using only ascii,
> (b) in general.
>
> Suggestions please?
>
> Another thing. The novice may well ask, why not: (suits=:
> '♣♦♥♠')?
>
> A footnote with a brief but clear explanation of why
> ($'♣♦♥♠') is not 4 but 12 would be helpful. (I don't
> consider the one-word answer utf8 to be an "explanation".)
>
> And has anyone written a unicode browser in J (the simpler the
> better) to insert a chosen char into the J window which works a bit
> like Menu
> > Insert > Symbol... in MSWord? If we have a Wiki page for it, it
> would be a courtesy to have a footnote directing readers there.
>
> Ian Clark
> for Vector Books.
> ----------------------------------------------------------------------
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------- End of Original Message -------
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