def replace_history_data(which,old, new)
new = new.dup if new
if (which < -2 || which >= @history_length || @history_length == 0 || @the_history.nil?)
return
end
if (which >= 0)
entry = @the_history[which]
if (entry && entry.data == old)
entry.data = new
end
return
end
last = -1
for i in 0 ... @history_length
entry = @the_history[i]
if entry.nil?
next
end
if (entry.data == old)
last = i
if (which == -1)
entry.data = new
end
end
end
if (which == -2 && last >= 0)
entry = @the_history[last]
entry.data = new
end
end