ios - Tricky Object Sorting and Removing from NSMutableArray -

-

i have array of objects (that contain message), every object has same structure. has message property nsdictionary. 1 dictionary looks this:

<message: {     keycreatedate = "06/08/14 21:23";     keymessage = lorem ipsum;     keyreceiverchannel = samplestring;     keysenderuser = samplename; },...

my goal make "inbox" display newest messages every user in each cell. want show newest messages each user, fb messages, what'sapp or imessage inbox, every cell in table view represents recent message friend. looks easy, it's harder imaged. need remove every message every friend, keep newest one. can remove message 1 user, can't keep newest while removing others. possible this?

i can remove message 1 specified user code:

    nsmutablearray *originalarray = [[nsmutablearray alloc]initwitharray:message];     nsmutablearray *objectstoremove = [[nsmutablearray alloc]init];     nsmutablearray *clonearray = [nsmutablearray arraywitharray:originalarray];      (nmessage *messageobject in originalarray) {         if ([messageobject.message[@"keysenderuser"] isequal:usernamestring]) {             [objectstoremove addobject:messageobject];         }     }      if ([objectstoremove count]>0) {         [clonearray removeobjectsinarray:objectstoremove];         nslog(@"deleted: %@", objectstoremove);         self.messagesarray = [[nsmutablearray alloc]initwitharray:clonearray];

i think easier, if somehow add exception [clonearray removeobjectsinarray:objectstoremove]; line, doesn't let remove newest ones. it's problem need sort messages based on keysenderuser before delete them. actual code can't that, can find 1 pre-defined user's message , remove of them. please share me if have idea. in advance.

i feel bottom better in case build new array contains latest message dictionary.

the solution below. 1. sort array using date. 2. create new list holding user messages. 2. loop through each object check whether user present, if not add created list.

the code solution below, pass in array of messaged, give list of messages latest user.

-(nsarray *) getlatestmessagelistforeveryuser:(nsarray *) array {     nsdateformatter *formatter = [[nsdateformatter alloc] init];     nsarray *sortedarray = [array sortedarrayusingcomparator:^nscomparisonresult(id obj1, id obj2) {         nsdate *obj1date = [formatter datefromstring: [(nsdictionary *)obj1 objectforkey:@"keycreatedate" ] ];         nsdate *obj2date = [formatter datefromstring:[(nsdictionary *)obj2 objectforkey:@"keycreatedate" ] ];         return  ([obj1date earlierdate:obj2date] == obj1date);     }];       nsmutablearray *messagearray = [nsmutablearray array];     nsmutablearray *usersarray = [nsmutablearray array];      (nsdictionary *messagedictionary in sortedarray)     {         nsstring *username = [messagedictionary objectforkey:@"keysenderuser"];         if (![usersarray containsobject:username])         {             [usersarray addobject:username];             [messagearray addobject:messagedictionary];         }     }     return messagearray; }

Comments

Post a Comment

Popular posts from this blog

database - VFP Grid + SQL server 2008 - grid not showing correctly -

-
i having problem, have grid called "gridbasica" , this: thisform.gridbase.recordsource = "sgviemp" sgviemp cursor made executing select sqlserver command sqlexec. when want modify registry, go form , the update there. so, when come form grid, grid isnt grid anymore, big white rectangle. reading around said: delete recordsource , asingt again. thisform.gridbase.recordsource = "" *--i sqlexe here thisform.gridbase.recordsource = "sgviemp" i , works, but, when click button modify again cursos updated modify form doesnt load fields did first time. could me out that? thanks in advance. --------------- edit ------------------ i have been doing recommended: lnselect = select(0) n = sqlexec(thisform.conexion,"select emp_ccodigo codigo, emp_cnombre 'nombre o razon social', emp_cnumrif 'r.i.f' sgviempr","sgviemp1") set echo on suspend select sgviemp zap in sgviemp *-- browse *--zaps correct
Read more

jquery - Set jPicker field to empty value -

-
im using jpicker color selector in form. have clear value set window/icon 'no color selected' state. i've tried following: $(':input[name="color"]').val(''); //access value directly. (does not affect jpicker) 2: $.jpicker.list[0].color.active.val('hex', '', this); //set color black , input value 000000, instead of empty string 3: $.jpicker.list[0].color.active.val(null, '', this); //does nothing none of 3 methods seems behave properly. in advance. this works me :) $.jpicker.list[0].color.active.val('v', null); here example: http://jsfiddle.net/3up7n/
Read more

.htaccess - htaccess convert request to clean url and add slash at the end of the url -

-
ok , searched more 4 days , more 20 posts here in stach or in websites without kind of success first here htaccess file rewriteengine on rewriterule ^([a-za-z0-9_]+)/?$ index.php?page=$1 [nc] rewriterule ^([a-za-z0-9_]+)\/([a-za-z0-9_]+)\/?$ index.php?page=$1&action=$2 [nc] i tried many codes 1 worked me can call request , works me www.example.com/pagename => www.example.com/index.php?page=pagename here questions , please provide me information "in detail" understand code well 1- how convert request automatically www.example.com/index.php?page=pagename www.example.com/pagename 2- if tried add slash @ end shows me page without images or styling mean www.example.com/pagename => works www.example.com/pagename/ => doesn't work that's :) for first part need 301 rule this: rewritecond %{the_request} /index\.php\?page=([^\s&]+) [nc] rewriterule ^ /%1? [r=301,l] for second part use absolute path in css, js, images files r
Read more