大约有 16,000 项符合查询结果（耗时：0.0280秒） [XML]
Compiled vs. Interpreted Languages
I'm trying to get a better understanding of the difference. I've found a lot of explanations online, but they tend towards the abstract differences rather than the practical implications.
...
Flask SQLAlchemy query, specify column names
How do I specify the column that I want in my query using a model (it selects all columns by default)? I know how to do this with the sqlalchmey session: session.query(self.col1) , but how do I do it with with models? I can't do SomeModel.query() . Is there a way?
...
Is there any way to prevent input type=“number” getting negative values?
I want to get only positive values, is there any way to prevent it using only html
Please don't suggest validation method
...
Meaning of $? (dollar question mark) in shell scripts
...# echoes 0
false
echo $? # echoes 1
From the manual: (acessible by calling man bash in your shell)
$? Expands to the exit status of the most recently executed foreground pipeline.
By convention an exit status of 0 means success, and non-zero return status means failure. Le...
Ternary operator in AngularJS templates
How do you do a ternary with AngularJS (in the templates)?
7 Answers
7
...
Can I force a page break in HTML printing?
I'm making a HTML report that is going to be printable, and it has "sections" that should start in a new page.
10 Answers
...
Pickle incompatibility of numpy arrays between Python 2 and 3
I am trying to load the MNIST dataset linked here in Python 3.2 using this program:
7 Answers
...
Detect permission of camera in iOS
I am developing a very simple video app. I use the official control: UIImagePickerController.
6 Answers
...
How do you change the size of figures drawn with matplotlib?
How do you change the size of figure drawn with matplotlib?
17 Answers
17
...
How to convert SQL Query result to PANDAS Data Structure?
Any help on this problem will be greatly appreciated.
17 Answers
17
...