Re: My first program: sublime (reverse of "extract" function)
- Posted by jimcbrown (admin) May 19, 2013
- 2396 views
SocIoDim said...
jimcbrown said...
I think I get it. Your example can still be implemented as:
sequence InputData = {0.01, 0.05, 0.08, 0.03, 0.02} sequence OutputData = 1 - InputData[2..$]
NO
I just meant that particular example. This won't help your real code though, so it's not worth delving into.
SocIoDim said...
I think, most optimal way is implement my own sorting function, that will output the sorted data and unsorted indexes. I wrote such function, but erase, because it turned ugly. This is wrong way: replacing the standard language features. This is called the invention of bicycles.
You can do this within the stdlib.
function compare_saving_index(object x, object y) return compare(x[2], y[2]) end function public function sort_with_index(sequence s, integer order = NORMAL_ORDER) sequence x = repeat(0, length(s)) for i = 1 to length(x) do x[i] = {i, s[i]} end for return custom_sort(routine_id("compare_saving_index"), s, order) end function public function get_indexes_from_sorted(sequence s) return vslice(s, 1) end function public function get_values_from_sorted(sequence s) return vslice(s, 2) end function sequence unsortedinput = ... sequence sortedandindex = sort_with_index(unsortedinput) sequence sortedinput = get_values_from_sorted(sortedandindex) sequence idx = get_indexes_from_sorted(sortedandindex) sequence sortedoutput = ... sortedinput ... sequence unsortedoutput = extract(sortedoutput,idx)
