大约有 19,602 项符合查询结果（耗时：0.0296秒） [XML]
DatabaseError: current transaction is aborted, commands ignored until end of transaction block?
... prevent the error from occurring:
from django.db import transaction, DatabaseError
try:
a.save()
except DatabaseError:
transaction.rollback()
Refer : Django documentation
share
|
improve...
php - get numeric index of associative array
...
All solutions based on array_keys don't work for mixed arrays. Solution is simple:
echo array_search($needle,array_keys($haystack), true);
From php.net:
If the third parameter strict is set to TRUE then the array_search() function will ...
indexOf method in an object array?
...m/find-index-of-object-in-array-by-contents ), and found that the function based answer mentioned here seems to be the second most performant answer. The only thing more performant ends up being putting it into a prototype, instead of just a function, as mentioned in my answer.
...
How to override the properties of a CSS class using another CSS class
...om css-tricks.com will help you produce right specificity for your element based on a points structure. Whichever specificity has higher points, will win. Sounds like a game - doesn't it?
Checkout sample calculations here on css-tricks.com. This will help you understand the concept very well and ...
Can I use a function for a default value in MySql?
...mbedded in the 1980's technology that apparently still exists in the MySQL base code (search for"we can't have nice things"): percona.com/blog/2013/04/08/…
– RyanNerd
Dec 11 '17 at 22:55
...
How do I fetch only one branch of a remote Git repository?
...lt;branch_name> FETCH_HEAD
git checkout <branch_name>
These are based on the answer by @Abdulsattar Mohammed, the comment by @Christoph on that answer, and these other stack overflow questions and their answers:
How do I check out a remote Git branch?
What does FETCH_HEAD in Git mean?
...
Case insensitive comparison of strings in shell script
...
I used the tr method in my docker-ized applications based on alpine (which provides sh via busybox). Thank you.
– MXWest
Aug 30 '19 at 20:11
add a comme...
angularjs newline filter with no other html
...eneral, since long rows will be wrapped (as they would with any <br> based solutions).
– tuomassalo
Dec 19 '13 at 9:03
13
...
How can I fill a div with an image while keeping it proportional?
...ld question but deserves an update as now there is a way.
The correct CSS based answer is to use object-fit: cover, which works like background-size: cover. Positioning would be taken care of by object-position attribute, which defaults to centering.
But there is no support for it in any IE / Edge...
Convert a Unix timestamp to time in JavaScript
I am storing time in a MySQL database as a Unix timestamp and that gets sent to some JavaScript code. How would I get just the time out of it?
...