This article was posted to the Usenet group alt.hackers in
1995; any technical information is probably outdated.
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Re: OBHack...
Article: 7694 of alt.hackers From: crosby@cs.colorado.edu Newsgroups: alt.hackers Subject: Re: OBHack... Date: 20 Apr 1995 22:53:27 GMT Organization: University of Colorado, Boulder Lines: 40 Approved: me Message-ID: 3n6ol7$87k@csnews.cs.colorado.edu NNTP-Posting-Host: nag.cs.colorado.edu Status: RO
In article <3mvu3r$1k7@usenet.rpi.edu>, Diversion <jeff@diversion.stu.rpi.edu> wrote: >crosby@cs.colorado.edu wrote: >: ObHack: > >: A vi-macro plot program to go with my vi calculator. Basically, >: you just give it a list of numbers and it puts an '*' in the approriate >: position. Really easy to do actually. > >Ok, the plotter shouldn't be too hard (given something like a >screen of all blanks), but I can't figure out how a calculator would >be done. Any pointers/source? > Actually, it runs under nvi, and some vi's (but not most.) The trick is the # command, present in nvi and a few real vi's, which increments or decrements a number. Given, eg, 4#+ will add 4 to a number, the rest is trivial. Heres mine, which handles +,- and *. I never bothered doing / map + "cPA#^[$"bp map - "cPA#^[$"bp map * "aPA#+^["zddo@z^[^"bP map g 1G"ayww"byww"cywGo^[o^[k"aPj@b"dYk@dddj"ey$dd1G3dw"eP A simpler version, that handles + and - is map g 1G"ayww"byww"cywGk"aPj"cPA#^[$"bp"dYk@dddj"ey$dd1G3dw"eP ObHack: Hmm...can't think of one. Use that above for the moment. ObFutureHack: Implementing above to run under all vi's. Lessee...probably lookup tables would be the best way to do it.
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