大约有 48,000 项符合查询结果（耗时：0.0712秒） [XML]
Check whether an array is empty [duplicate]
...
There are two elements in array and this definitely doesn't mean that array is empty. As a quick workaround you can do following:
$errors = array_filter($errors);
if (!empty($errors)) {
}
array_filter() function's default behavior will remove all values...
How should strace be used?
...rogram is interacting with the OS. It does this by monitoring system calls and signals.
Uses
Good for when you don't have source code or don't want to be bothered to really go through it.
Also, useful for your own code if you don't feel like opening up GDB, but are just interested in understanding ...
How to find a table having a specific column in postgresql
...attribute as a on a.attrelid = c.oid
where a.attname = <column name> and c.relkind = 'r'
sql fiddle demo
share
|
improve this answer
|
follow
|
...
Composite Key with EF 4.1 Code First
...
You can mark both ActivityID and ActivityName properties with Key annotation or you can use fluent API as described by @taylonr.
Edit:
This should work - composite key defined with annotations requires explicit column order:
public class ActivityType
...
C++ Const Usage Explanation
...hanged, to an int that cannot be changed: the only difference between this and const int& is that it can be null
const int* const& means a reference to a constant pointer to a constant int. Usually pointers are not passed by reference; const int* & makes more sense because it would mean...
Rake just one migration
...
rake db:migrate:redo VERSION=xxxxxxx, but that will run the down and then the up step. You could do this in conjunction with commenting out the down step temporarily.
share
|
improve this ...
RelativeLayout is taking fullscreen for wrap_content
...u cannot have a circular dependency between the size of the RelativeLayout and the position of its children. For example, you cannot have a RelativeLayout whose height is set to WRAP_CONTENT and a child set to ALIGN_PARENT_BOTTOM
Class documentation
Which is exactly your case. RelativeLayout can no...
URL rewriting with PHP
...s route with mod_rewrite
Add a file called .htaccess in your root folder, and add something like this:
RewriteEngine on
RewriteRule ^/?Some-text-goes-here/([0-9]+)$ /picture.php?id=$1
This will tell Apache to enable mod_rewrite for this folder, and if it gets asked a URL matching the regular exp...
Parser Error Message: Could not load type 'TestMvcApplication.MvcApplication'
...
+1 This was my problem too. The error message and help on this is basically non-existent. Thanks.
– Noldorin
Jan 6 '12 at 11:50
4
...
Recommended website resolution (width and height)? [closed]
Is there any standard on common website resolution?
23 Answers
23
...