whack: v. According to arch-hacker James Gosling (designer of
NeWS, GOSMACS and Java), to "...modify a program with no idea
whatsoever how it works." (See whacker.) It is actually possible
to do this in nontrivial circumstances if the change is small and
well-defined and you are very good at glarking things from
context. As a trivial example, it is relatively easy to change all
`stderr' writes to `stdout' writes in a piece of C filter code which
remains otherwise mysterious.
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