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 - Convert white space to tabs -

-

i decided learn c, started going through k&r, got stuck on problem 21 in chapter 1. supposed write program, given string without tabs , tabwidth, converts white space equivalent spacing using tabs , white space.

so far, i've got this:

void entab (char from[], char to[], int length, int tabwidth) {     int i, j, tabpos, flag, count;      j = tabpos = flag = count = 0;     (i = 0; from[i] != '\0' && j < length - count - 2; i++) {         if (from[i] == ' ') {             // if see space, set flag true , increment             // whitespace counter. don't add characters until reach             // next tabstop.             count++;             tabpos = (tabpos + 1) % tabwidth;             flag = 1;             if (count >= tabwidth - tabpos) {                 to[j] = '\t';                 j++;                 count = count - tabwidth + tabpos;                 tabpos = 0;             }         } else {             if (flag == 1) {                 // if see other space , flag true,                 // there weren't enough spaces reach tabstop. add count                 // spaces string.                 flag = 0;                 tabpos = (tabpos + count + 1) % tabwidth;                 while (count > 0) {                     to[j] = ' ';                     j++;                     count--;                 }             } else {                 tabpos = (tabpos + 1) % tabwidth;             }             count = 0;             to[j] = from[i];             j++;         }     }     to[j] = '\0';     return; }

which, unfortunaly, seems produce larger spacing it's supposed to. ideas screwed up?

ps i've looked @ other solutions online , understand there better approach problem, fix error in mine well.

edit: setting tabwidth=4 , using:

    foobar         foo  bar      foo bar     foo     bar

as input, get:

/t/tfoobar /t/t/t/tfoo  bar/t/t/t foo bar /t/tfoo/t/t bar

as output, while correct output be:

/tfoobar /t/tfoo/t bar/t/t foo bar /tfoo/t/tbar 

if (count >= tabwidth - tabpos)

this starts outputting tabs soon. consider input string:

"aa              "

with 8 tabwidth. character 5 (i 4, count 3) when tabpos becomes 5, therefore triggering condition. don't want output tabs before variable reaches tabwidth.

i won't fix code either. instead of making general statements "refactor code" 21st century way of saying "rewrite code", can point out 1 obvious mistake. don't need tabpos variable. use (i % tabwidth). here on things should start falling place.


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