Sorry. I must have got confused. I do not think I have seen your implementation than. Please email it to me.
Massimo On Dec 29, 9:22 am, Timothy Farrell <[email protected]> wrote: > Yes, but before I do that, I want to clarify something. > My first implementation results in a JSON list of objects like so (roughly):[ > {field1:'field1val',field2:'field2val'}, > {field1:'field1val',field2:'field2val'} ] > Your reimplementation results in a JSON list of lists where the first list is > the field (column) names like so: > [ ['field1', 'field2'], ['field1val', 'field2val'], ['field1val', > 'field2val'] ] > My implementation is more useful for programming in Javascript. With your > implementation (while more efficient on the wire), requires that we have to > unpack the data in client-side Javascript which adds an extra step for the > developer and, if the user has either IE and/or a slow computer this could > add an undesirable delay for large datasets (which was the whole point of my > using list comprehensions in the first place). > So can I send you a patch redone with my method (JSON list of objects)? > -tim > mdipierro wrote:where? Can you send me a patch? Massimo On Dec 29, 9:01 am, > Timothy Farrell<[email protected]>wrote:You might want to switch back to > list comprehensions. Granted the code is uglier but there are two big > reasons. 1) Speed. Seehttp://www.daniweb.com/forums/thread32869.htmlfor more > info. You could wrap the inner loop inner workings in a function and still > reap massive benefits by not having to call list.append() n^2 times. 2) It's > recommended for building lists in Py3k. The results of the above linked test > are:[0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, > 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58] [0, 2, 4, 6, 8, 10, 12, 14, 16, > 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, > 56, 58] Profile of evenList1(), check the time consumed by the many append() > calls: (ignore time consumed by the profiler itself) 50005 function calls in > 0.174 CPU seconds Ordered by: standard name ncalls tottime percall cumtime > percall filename:lineno(function) 50000 0.066 0.000 0.066 0.000 :0(append) 1 > 0.002 0.002 0.002 0.002 :0(range) 1 0.005 0.005 0.005 0.005 :0(setprofile) 1 > 0.001 0.001 0.168 0.168 <string>:1(<module>) 1 0.100 0.100 0.168 0.168 > Script1.py:5(evenList1) 1 0.000 0.000 0.174 0.174 profile:0(evenList1()) 0 > 0.000 0.000 profile:0(profiler) Profile of evenList2(): (ignore time consumed > by the profiler itself) 5 function calls in 0.018 CPU seconds Ordered by: > standard name ncalls tottime percall cumtime percall > filename:lineno(function) 1 0.002 0.002 0.002 0.002 :0(range) 1 0.000 0.000 > 0.000 0.000 :0(setprofile) 1 0.001 0.001 0.018 0.018 <string>:1(<module>) 1 > 0.015 0.015 0.017 0.017 Script1.py:15(evenList2) 1 0.000 0.000 0.018 0.018 > profile:0(evenList2()) 0 0.000 0.000 profile:0(profiler) mdipierro wrote:OK. > it is in trunk but slightly different. The representation is now independent > on the database backend. Massimo On Dec 29, 8:04 am, Timothy > Farrell<[email protected]>wrote:Massimo, would it help if I made a bzr > branch? Timothy Farrell wrote:I've been using this in my setup (my setup has > a few customizations) since the thread linked below. Just to say that it > works! -tim vince > wrote:http://groups.google.com/group/web2py/browse_thread/thread/8e3e33879974663f/64f76c562366aec4?lnk=gst&q=json#64f76c562366aec4willitbe > added or we'll have to wait? i think it's hard to avoid all dependency > contrib / thirdparty package. as long as it's include i think that's fine. > -vince-- Timothy Farrell<[email protected]>Computer Guy Statewide General > Insurance Agency (www.swgen.com)-- Timothy > Farrell<[email protected]>Computer Guy Statewide General Insurance Agency > (www.swgen.com)-- Timothy Farrell<[email protected]>Computer Guy Statewide > General Insurance Agency (www.swgen.com)-- Timothy > Farrell<[email protected]>Computer Guy Statewide General Insurance Agency > (www.swgen.com) --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "web2py Web Framework" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/web2py?hl=en -~----------~----~----~----~------~----~------~--~---
