大约有 31,500 项符合查询结果（耗时：0.0293秒） [XML]
MySQL “incorrect string value” error when save unicode string in Django
...8mb4 uses 33% more space than utf-8 you'll need to make these fields 33% smaller.
In this case, change the max_length from 255 to 191.
Alternatively you can edit your MySQL configuration to remove this restriction but not without some django hackery
UPDATE: I just ran into this issue again and ...
Removing viewcontrollers from navigation stack
...e this code and enjoy:
NSMutableArray *navigationArray = [[NSMutableArray alloc] initWithArray: self.navigationController.viewControllers];
// [navigationArray removeAllObjects]; // This is just for remove all view controller from navigation stack.
[navigationArray removeObjectAtIndex: 2]; // ...
Defeating a Poker Bot
There is a new Open Source poker bot called PokerPirate . I am interested in any creative ways in which a web application could detect/thwart/defeat a poker bot. (This is a purely academic discussion, in the same spirit that PokerPirate was written.)
...
Which is preferred: Nullable.HasValue or Nullable != null?
...
The compiler replaces null comparisons with a call to HasValue, so there is no real difference. Just do whichever is more readable/makes more sense to you and your colleagues.
share
|
...
How can I pipe stderr, and not stdout?
...1 >/dev/null | grep 'something'
For the details of I/O redirection in all its variety, see the chapter on Redirections in the Bash reference manual.
Note that the sequence of I/O redirections is interpreted left-to-right, but pipes are set up before the I/O redirections are interpreted. File ...
Ember.js or Backbone.js for Restful backend [closed]
... approach' to Backbone.js. They're different kinds of tools that target totally different end products. Ember's sweet spot is applications where the user will keep the application open for long periods of time, perhaps all day, and interactions with the application's views or underlying data trigger...
Remove blank lines with grep
...
Try the following:
grep -v -e '^$' foo.txt
The -e option allows regex patterns for matching.
The single quotes around ^$ makes it work for Cshell. Other shells will be happy with either single or double quotes.
UPDATE: This works for me for a file with blank lines or "all white ...
What's the best way to trim std::string?
I'm currently using the following code to right-trim all the std::strings in my programs:
46 Answers
...
When should I choose Vector in Scala?
It seems that Vector was late to the Scala collections party, and all the influential blog posts had already left.
6 Answ...
Concatenating two one-dimensional NumPy arrays
...smetic than substantial, but it's good when the API is consistent (e.g. if all the numpy functions that take variable length argument lists require explicit sequences).
– Jim K.
Aug 24 '16 at 20:43
...