大约有 3,000 项符合查询结果（耗时：0.0244秒） [XML]
What is “runtime”?
...ples.
Consider running a program compiled in Turbo-Borland C/C++ (version 3.1 from the year 1991) compiler and let it run under a 32-bit version of windows like Win 98/2000 etc.
It's a 16-bit compiler. And you will see all your programs have 16-bit pointers. Why is it so when your OS is 32bit? Bec...
How to know if an object has an attribute in Python
...produce a value. Also, hasattr only suppresses exceptions in general on Py 3.1 and earlier; in 3.2+, it only suppresses (replacing with False return) AttributeError.
– ShadowRanger
Apr 25 '18 at 19:32
...
pandas GroupBy columns with NaN (missing) values
...ues are now allowed in the grouper using dropna=False:
pd.__version__
# '1.1.0.dev0+2004.g8d10bfb6f'
# Example from the docs
df
a b c
0 1 2.0 3
1 1 NaN 4
2 2 1.0 3
3 1 2.0 2
# without NA (the default)
df.groupby('b').sum()
a c
b
1.0 2 3
2.0 2 5
# with NA
df...
Is there any Rails function to check if a partial exists?
...
Currently, I'm using the following in my Rails 3/3.1 projects:
lookup_context.find_all('posts/_form').any?
The advantage over other solutions I've seen is that this will look in all view paths instead of just your rails root. This is important to me as I have a lot of ra...
Android: create a popup that has multiple selection options
I've been searching around trying to figure out how to create a popup or a dialog that has 4 options to choose from.
4 Answ...
How to define custom configuration variables in rails
...
This works in rails 3.1:
in config/environment.rb (or in config/environments/.. to target a specific environment) :
YourApp::Application.config.yourKey = 'foo'
This will be accessible in controller or views like this:
YourApp::Applicati...
What is the maven-shade-plugin used for, and why would you want to relocate Java packages?
...le, I am developing Foo library, which depends on a specific version (e.g. 1.0) of Bar library. Assuming I cannot make use of other version of Bar lib (because API change, or other technical issues, etc). If I simply declare Bar:1.0 as Foo's dependency in Maven, it is possible to fall into a probl...
Why dict.get(key) instead of dict[key]?
...ited Apr 7 '17 at 7:22
Jean-François Corbett
33.6k2525 gold badges124124 silver badges172172 bronze badges
answered Jun 14 '12 at 21:12
...
Amazon S3 CORS (Cross-Origin Resource Sharing) and Firefox cross-domain font loading
...shed some lights on this, it'll be greatly appreciated.
<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
<CORSRule>
<AllowedOrigin>https://mydomain.com</AllowedOrigin>
<AllowedMethod>GE...
Numpy index slice without losing dimension information
....matmul() or @). Just got burned by this.
– Jean-François Corbett
Mar 27 '19 at 12:02
|
show 3 more comments
...