大约有 5,880 项符合查询结果(耗时:0.0405秒) [XML]

https://stackoverflow.com/ques... 

How can I apply a function to every row/column of a matrix in MATLAB?

...elp/matlab/ref/rowfun.html), but the only "problem" is that it operates on tables (http://www.mathworks.se/help/matlab/ref/table.html) rather than matrices. share | improve this answer | ...
https://stackoverflow.com/ques... 

MySQL, better to insert NULL or empty string?

...ome of the fields are optional while some are mandatory. In my DB I have a table which holds all these values, is it better practice to insert a NULL value or an empty string into the DB columns where the user didn't put any data? ...
https://stackoverflow.com/ques... 

Are inline virtual functions really a non-sense?

... as this->Temp::myVirtualFunction() - such invokation skips the virtual table resolution and the function should be inlined without problems - why and if you'd want to do it is another topic :) – RnR Apr 9 '09 at 12:12 ...
https://stackoverflow.com/ques... 

CSS styling in Django forms

...ces; your classes or other attributes just work if you use the Django's as_table/as_ul/as_p form methods. If you need full control for a completely custom rendering, this is clearly documented -- EDIT 2 --- Added a newer way to specify widget and attrs for a ModelForm. ...
https://stackoverflow.com/ques... 

Best way to check if object exists in Entity Framework?

...t.Employees.Any()) Then ' Check if there are "any" records in the Employee table Dim employee = From c In context.Employees Select c.PayrollNumber ' Select just the PayrollNumber column to work with For Each item As Object In employee ' Loop through each employee in the Employees ent...
https://stackoverflow.com/ques... 

How many GCC optimization levels are there?

...is a strong indicator that there are only 3 levels. opts.c:default_options_table opt_levels is so interesting, that we grep OPT_LEVELS_3_PLUS, and come across opts.c:default_options_table: static const struct default_options default_options_table[] = { /* -O1 optimizations. */ { OPT_LEVELS_...
https://stackoverflow.com/ques... 

Nested select statement in SQL Server

... as a We need to make an alias of the subquery because a query needs a table object which we will get from making an alias for the subquery. Conceptually, the subquery results are substituted into the outer query. As we need a table object in the outer query, we need to make an alias of the inne...
https://stackoverflow.com/ques... 

PostgreSQL delete with inner join

... for larger tables, the first solution in this answer is potentially much faster. – mgoldwasser Nov 2 '14 at 16:58 2 ...
https://stackoverflow.com/ques... 

Error: 10 $digest() iterations reached. Aborting! with dynamic sortby predicate

...controller="testctrl"> <label>{{total}}</label> <table> <tr ng-repeat="item in items track by $index;" ng-init="end($index);"> <td>{{item.number}}</td> </tr> </table> </div> var app = angular.module('myApp',...
https://stackoverflow.com/ques... 

Submitting a multidimensional array via POST with php

...p through the values. if ( isset( $_POST['diameters'] ) ) { echo '<table>'; foreach ( $_POST['diameters'] as $diam ) { // here you have access to $diam['top'] and $diam['bottom'] echo '<tr>'; echo ' <td>', $diam['top'], '</td>'; e...