2013-09-24



Used functions in bc(1). I do use bc(1) regularily for all  sorts
of  calculations  on  the command line. I like it a lot (although
GNU bc requires me to allways invoke it with `-ql'). Usually, I'm
doing  simple mathematics only. This time however, I've written a
more complex formula to calculate the exchange value  of  players
in the PBM game United. The small script is more a quick and dir-
ty helper that solved an ad hoc problem than  a  real  tool,  but
well  ... I've used bc(1) for it. That's reason enough to mention
it.

     #!/bin/sh

     if [ $# -ne 1 ] ; then
             echo "Usage: ${0##*/} n" >&2
             exit 1
     fi

     while read w1 w2 ; do
             bc -ql <<-!
                     scale = 0
                     define hw (n, w1, w2) {
                             return ((12-n)*w1 + (n-1)*w2) / 11 }
                     print hw($1, $w1, $w2), "\n"
             !
     done

(The command line paramerter `n' is the  number  of  the  current
round; the two values on stdin (w1, w2) are the player values for
the current and next season, taken from a static table.)



Came across GNUnet.  [0] [1] This really looks interesting!   De-
centralized,  mesh  networks  are IMO a very natural form of net-
works. Such network concepts are what we should approach  in  the
future.  Unfortunately,  this topic is too closely connected with
file sharing -- as if this is all people would like to have dark-
nets  for;  ...  as if other networks would not actually exist to
share files (as the general container for information), as  well.
I'd  love to know more about that thing: GNUnet. Should read some
stuff about it ...

[0]  http://gnunet.org/
[1]  http://en.wikipedia.org/wiki/GNUnet


http://marmaro.de/lue/        markus schnalke <meillo@marmaro.de>