algorithm - Add sequence number for dynamic hierarchy in C# -


suppose have these records:

code     |grouplevel    |group ----------------------------------- x0000    |4             | x1000    |3             |x0000 x2000    |3             |x0000 x3000    |3             |x0000 x1100    |2             |x1000 x1200    |2             |x1000 x1300    |2             |x1000 x2100    |2             |x2000 x2200    |2             |x2000 x2300    |2             |x2000 x1110    |1             |x1100 x1120    |1             |x1100 x1111    |0             |x1110 x1112    |0             |x1110 x1113    |0             |x1110 x1114    |0             |x1110

what want acheive have kind of sequence number:

seq |code     |grouplevel    |group ------------------------------------- 1   |x0000    |4             | 2   |x1000    |3             |x0000 3   |x1100    |2             |x1000 4   |x1110    |1             |x1100 5   |x1111    |0             |x1110 6   |x1112    |0             |x1110 7   |x1113    |0             |x1110 8   |x1114    |0             |x1110 9   |x1120    |1             |x1100 10  |x1200    |2             |x1000 11  |x1300    |2             |x1000 12  |x2000    |3             |x0000 13  |x2100    |2             |x2000 14  |x2200    |2             |x2000 15  |x2300    |2             |x2000 16  |x3000    |3             |x0000

i tried fixed group level (3) not if group level > 5.

here's did:

list<mysequencemodel> _lstpair = new list<mysequencemodel>(); var _lst = _records.where(x => x.grouplevel == 3).tolist(); foreach (var item in _lst) {     if (_lstpair.where(x => x.code.equals(item.code)).firstordefault() == null)         _lstpair.add(new mysequencemodel { code = item.code, seqno = _seqcounter++ });      var _lst2 = _records.where(x => x.group.equals(item.code) && !x.code.equals(item.code)).orderby(x => x.code).tolist();     foreach (var _item2 in _lst2)     {         if (_lstpair.where(x => x.code.equals(_item2.code)).firstordefault() == null)             _lstpair.add(new mysequencemodel { code = _item2.code, seqno = _seqcounter++ });         var _lst3 = _records.where(x => x.group.equals(_item2.code) && !x.code.equals(_item2.code)).orderby(x => x.code).tolist();         foreach (var _item3 in _lst3)         {             if (_lstpair.where(x => x.code.equals(_item3.code)).firstordefault() == null)                 _lstpair.add(new mysequencemodel { code = _item3.code, seqno = _seqcounter++ });             var _lst4 = _records.where(x => x.group.equals(_item3.code) && !x.code.equals(_item3.code)).orderby(x => x.code).tolist();             foreach (var _item4 in _lst4)             {                 if (_lstpair.where(x => x.code.equals(_item4.code)).firstordefault() == null)                     _lstpair.add(new mysequencemodel { code = _item4.code, seqno = _seqcounter++ });             }         }     } }

mysequencemodel class has code , sequence number needed reporting. pseudo code do.

tia

given following input data (take question):

mysequencemodel[] _records = new mysequencemodel[] {     new mysequencemodel { code = "x0000", grouplevel = 4, group = "" },     new mysequencemodel { code = "x1000", grouplevel = 3, group = "x0000" },     new mysequencemodel { code = "x2000", grouplevel = 3, group = "x0000" },     new mysequencemodel { code = "x3000", grouplevel = 3, group = "x0000" },     new mysequencemodel { code = "x1100", grouplevel = 2, group = "x1000" },     new mysequencemodel { code = "x1200", grouplevel = 2, group = "x1000" },     new mysequencemodel { code = "x1300", grouplevel = 2, group = "x1000" },     new mysequencemodel { code = "x2100", grouplevel = 2, group = "x2000" },     new mysequencemodel { code = "x2200", grouplevel = 2, group = "x2000" },     new mysequencemodel { code = "x2300", grouplevel = 2, group = "x2000" },     new mysequencemodel { code = "x1110", grouplevel = 1, group = "x1100" },     new mysequencemodel { code = "x1120", grouplevel = 1, group = "x1100" },     new mysequencemodel { code = "x1111", grouplevel = 0, group = "x1110" },     new mysequencemodel { code = "x1112", grouplevel = 0, group = "x1110" },     new mysequencemodel { code = "x1113", grouplevel = 0, group = "x1110" },     new mysequencemodel { code = "x1114", grouplevel = 0, group = "x1110" }, };

then works:

var lookup = _records.tolookup(x => x.group); func<string, ienumerable<mysequencemodel>> traverse = null; traverse = grp => lookup[grp].selectmany(x => new [] { x }.concat(traverse(x.code)));  mysequencemodel[] results =     traverse("")         .select((x, n) => new mysequencemodel         {             seqno = n + 1,             code = x.code,             grouplevel = x.grouplevel,             group = x.group         })         .toarray();

it gives me:

results


Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj...
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer ...
Read more

c# - Asp.net web api : redirect unauthorized requst to forbidden page -

im trying redirect unauthorized request forbidden page instead i'm getting forbidden page in response body , how can fix ? here's startup class : app.createperowincontext(storecontext.create); app.createperowincontext<applicationusermanager>(applicationusermanager.create); app.createperowincontext<applicationsigninmanager>(applicationsigninmanager.create); app.usecookieauthentication(new cookieauthenticationoptions { authenticationtype = defaultauthenticationtypes.applicationcookie, expiretimespan = timespan.fromdays(30), }); app.useexternalsignincookie(defaultauthenticationtypes.externalcookie); app.usetwofactorsignincookie(defaultauthenticationtypes.twofactorcookie, timespan.fromminutes(5)); app.usetwofactorrememberbrowsercookie(defaultauthenticationtypes.twofactorrememberbrowsercookie); the method im trying reach : [httpget] [authorize(roles = "admin")] public string getcurrentusername() { return userman...
Read more