大约有 44,000 项符合查询结果（耗时：0.0675秒） [XML]
Git push error '[remote rejected] master -> master (branch is currently checked out)'
...ository the user is working with on two computers?
– Nowhere man
Mar 18 '13 at 10:38
9
Changing t...
Run a callback only if an attribute has changed in Rails
...saving to the database, or within the before_save filter:
changes should now be changes_to_save
changed? should now be has_changes_to_save?
changed should now be changed_attribute_names_to_save
<attribute>_change should now be <attribute>_change_to_be_saved
<attribute>_changed? s...
Django development IDE [closed]
...ans starting to get Python support, but I have no idea where that is right now. Lots of people rave about NetBeans 6, but in the Java world Eclipse still reigns as the king of the OSS IDEs.
share
|
...
Difference between freeze and seal
...
FWIW, frozen and sealed objects are now faster than their unfrozen and unsealed counterparts in Chrome Canary v43.0.2317.0.
– llambda
Feb 28 '15 at 22:57
...
rails - Devise - Handling - devise_error_messages
...e method, effectively overriding the default implementation. I'll let you know how it goes.
Update
Yep, that works. I created app/helpers/devise_helper.rb and overrode it like so:
module DeviseHelper
def devise_error_messages!
'KABOOM!'
end
end
So knowing this, I can modify the method t...
How do I get the current date and time in PHP?
...
Since PHP 5.2.0 you can use the DateTime() class:
use \Datetime;
$now = new DateTime();
echo $now->format('Y-m-d H:i:s'); // MySQL datetime format
echo $now->getTimestamp(); // Unix Timestamp -- Since PHP 5.3
And to specify the timezone:
$now = new DateTime(null, new D...
Max size of an iOS application
... is still the same with the exception of the Executable File size which is now limited to 60MB's. These changes can be found on page 237 of the guide.
As of January 10, 2013
The above information is still the same with the exception of the Executable File size which is now limited to 60MB's. Thes...
How do you properly use namespaces in C++?
...e object into packages, and then reusing them later from that package. But now I'm working in C++.
15 Answers
...
How to scroll to an element inside a div?
...t_within_div');
var topPos = myElement.offsetTop;
The variable topPos is now set to the distance between the top of the scrolling div and the element you wish to have visible (in pixels).
Now we tell the div to scroll to that position using scrollTop:
document.getElementById('scrolling_div').scr...
How can I troubleshoot my Perl CGI script?
I have a Perl script that isn't working and I don't know how to start narrowing down the problem. What can I do?
8 Answers
...