simple but handy extension for whos()
whom(“Module”, xpkg = Base) → modules in Base
whom(xpkg = Base.Sys) → functions in Base.Sys
whom(“Array”) → Arrays in main
function whom(xgetch = "#", xdisc = false, xbuf = []; retbuf = false, xpkg = Main)
if(xbuf == [])
xbuf = IOBuffer();
whos(xbuf, xpkg);
write(xbuf, "\0");
end;
seek(xbuf, 0);
while(!eof(xbuf))
k = readline(xbuf);
b = contains(k, xgetch) == !xdisc;
if(b) println(k); end;
end;
if(retbuf) return(xbuf); end;
end;