Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!columbia!cunixc!jbaltz
From: jbaltz@cunixc.cc.columbia.edu (Jerry B. Altzman)
Newsgroups: comp.lang.lisp
Subject: explode macro/function for SUN cl
Keywords: sun, common lisp, explode
Message-ID: <1211@cunixc.cc.columbia.edu>
Date: 12 Feb 89 22:04:31 GMT
Organization: Columbia University
Lines: 24

Does anyone out there have an explode macro or function?

For those that don't know, explode is a function that takes an atom and
returns the letters that make up the atom itself, as a list. For example:

(explode 'foobar) ==> (f o o b a r)

As well, if someone has the opposite function, implode, which takes a list
of single letters and implodes them into a list consisting of a single
atom: for example
(implode '(f o o b a r)) ==> (foobar)

[For robustness, implode should only take the first character from each
element of its argument:
(implode '(foo b a r)) ==> (fbar) ]

Thanks a bundle.

/jerry

-- 
jerry b. altzman	consultant, instructional computing consulting group
postmaster, columbia university  212 854 8555 (w)   212 853 6737 (h)
jbaltz@cunixc.cc.columbia.edu	postmast@cuvmb.bitnet  nevis::x707jxa (hepnet)