Featured post

c# - Usage of Server Side Controls in MVC Frame work -

-
i using asp.net 4.0 , mvc 2.0 web application. project requiremrnt have use server side control in application not possibl in noraml case. ideally want use adrotator control , datalist control. i saw few samples , references in codepleax mvc controllib howwver found less useful. can tell how utilize theese controls in asp.net application along mvc. note: please provide functionalities related adrotator , datalist controls not equivalent functionalities thanks in advace. mvc pages not use normal .net solution makes use of normal .net components impossible. a normal .net page use event driven solution call different methods service side mvc use actions , view completly different way handle things. also, mvc not use viewstate normal .net controlls require. found article discussing mixing of normal .net , mvc.
3 comments

c++ stl vector causing memory overflow? -

-

i making extensive use of stl vectors manage memory (de-) allocation of large arrays of data. in particular generating perspective projections of anatomical structures large number of angles (180 in 2 degree steps), processing , analysing results. results used define radiation fields radiotherapy.

it seems if arrays exceed size (>3 anatomical structures) memory overflows. in particular error follows

terminate called after throwing instance of 'std::out_of_range' what(): vector::_m_range_check

this result of using at, bounds checking, rather faster [] operator. if have <=3 structures error not occur.

i have tracked error down following block of code

bool dicomcp::assignbeamlet(int beamletnumber, beamlet &b1) {  //std::cout << "\ninside dicomcp::assignbeamlet (int, beamlet &)\n";    if (!this->isset)   {    this->beamlets.at(beamletnumber).setleftright(b1.left,b1.right);     this->isset=true;     return true;     }    else if (!this->beamlets.at(beamletnumber-1).isopen())   {     return false;    }    // left (outside) min(left) , right (outside) max(right) leaves   else if ((this->beamlets.at(beamletnumber-1).right-b1.left >epsilon2)&&(b1.right-this->beamlets.at(beamletnumber-1).left>epsilon2))   {     if (this->beamlets.at(beamletnumber).open) return false;     else if (!this->beamlets.at(beamletnumber).open)    {    this->beamlets.at(beamletnumber).setleftright(b1.left,b1.right);    this->beamlets.at(beamletnumber).isassigned=true;       this->isset=true;    return true;    }   }    else return false;  }

note if "this->isset=true;" lines commented out error not manifest regardless of number of structures :yes works 6! "isset" boolean value used determine objects have been set, , hence objects need written out data file further processing.

system , sodtware:

gcc (suse linux) 4.4.1 [gcc-4_4-branch revision 150839] suse 11.2 64bit intel celsius 4 xeon 2.66ghz cpus , 4gb ram eclipse cdt (ide) 64 bit build 20100218-1602

apparently, accessing elements outside of container. it's impossible code, whether indexes correct or not, walk through code in debugger , see. suspicious looking piece: this->beamlets.at(beamletnumber-1).isopen() if beamletnumber 0? invalid index.


Comments

Post a Comment

Popular posts from this blog

c# - Usage of Server Side Controls in MVC Frame work -

-
i using asp.net 4.0 , mvc 2.0 web application. project requiremrnt have use server side control in application not possibl in noraml case. ideally want use adrotator control , datalist control. i saw few samples , references in codepleax mvc controllib howwver found less useful. can tell how utilize theese controls in asp.net application along mvc. note: please provide functionalities related adrotator , datalist controls not equivalent functionalities thanks in advace. mvc pages not use normal .net solution makes use of normal .net components impossible. a normal .net page use event driven solution call different methods service side mvc use actions , view completly different way handle things. also, mvc not use viewstate normal .net controlls require. found article discussing mixing of normal .net , mvc.
Read more

ios - Very simple iPhone App crashes on UILabel settext -

-
i have simple application. have button , label in ib. have ibaction onclick calls settext on label. there's outlet label. connected in ib. crashes app first time in simulator. when launch again, sets text. crashes again next time. crashes on actual device. should simple, i'm not sure i'm doing wrong. thanks. in .h file : #import <uikit/uikit.h> @interface untitledviewcontroller : uiviewcontroller { iboutlet uilabel *label; iboutlet uibutton *button; } @property (nonatomic, retain) uilabel *label; -(ibaction) onclick1: (id) sender; @end and in .m: - (ibaction) onclick1: (id) sender { //[label settext:@"hello world!"]; label.text = @"hello world!"; //[button settitle:@"clicked" forstate:uicontrolstatenormal]; } sorry, i'm new site. how crash log , stack? thanks. edit : while answer technically correct, doesn't answer question @ :( sorry < warning - guess > if you're...
Read more

mysql - Why there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT clause? -

-
why there can 1 timestamp column current_timestamp in default or on update clause? create table `foo` ( `productid` int(10) unsigned not null, `addeddate` timestamp not null default current_timestamp, `updateddate` timestamp not null default current_timestamp on update current_timestamp ) engine=innodb; the error results: error code : 1293 incorrect table definition; there can 1 timestamp column current_timestamp in default or on update clause this limitation, due historical, code legacy reasons, has been lifted in recent versions of mysql: changes in mysql 5.6.5 (2012-04-10, milestone 8) previously, @ 1 timestamp column per table automatically initialized or updated current date , time. restriction has been lifted. timestamp column definition can have combination of default current_timestamp , on update current_timestamp clauses. in addition, these clauses can used datetime column definitions. more information, see automati...
Read more