大约有 40,000 项符合查询结果（耗时：0.0493秒） [XML]
Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
...ision results, double-precision suffices for a gold standard — the error from aaaaaa computed in double is *vastly smaller than the error of any of the single-precision computations.
– Stephen Canon
Sep 24 '13 at 22:47
...
Python extending with - using super() Python 3 vs Python 2
...d to do super(self.__class__, self), but that is wrong. If Class2 inherits from Class1 and Class1 calls super(self.__class__, self).__init__(), Class1's __init__ will then call itself when instantiating an instance of Class2.
– jpmc26
Jul 15 '15 at 18:10
...
JUnit: how to avoid “no runnable methods” in test utils classes
I have switched to JUnit4.4 from JUnit3.8. I run my tests using ant, all my tests run successfully but test utility classes fail with "No runnable methods" error. The pattern I am using is to include all classes with name *Test* under test folder.
...
ASP.NET MVC framework 4.5 CSS bundle does not work on the hosting
...f the StyleBundle constructor) doesn't match a folder in the file system.
From the comments:
"A good convention to follow when creating bundles is to include
"bundle" as a prefix in the bundle name. This will prevent a possible
routing conflict."
...
Python UTC datetime object's ISO format doesn't include Z (Zulu or Zero offset)
...age to get some default time zones, or directly subclass tzinfo yourself:
from datetime import datetime, tzinfo, timedelta
class simple_utc(tzinfo):
def tzname(self,**kwargs):
return "UTC"
def utcoffset(self, dt):
return timedelta(0)
Then you can manually add the time zone...
When to use an object instance variable versus passing an argument to the method
...f a class. Think of these as adjectives of the object that will be created from your class. If your instance data can be used to help describe the object, then it's probably safe to bet it's a good choice for instance data.
Local variables are used within the scope of methods to help them complete t...
Disable intellij indexing on specific folder
...
This also excludes the file from a lot of other things. I don't want to exclude the file from the project - just the index. I still want the file to appear in the list of changed files so i can commit the file (or view diffs or whatever)
...
Why do we use __init__ in Python classes?
... I will start referring to the object known as fido with yet another name. From now on, fido.colour is exactly the same variable as the_mangy_one.colour.
So, the things inside the __init__. You can think of them as noting things into the Dog's birth certificate. colour by itself is a random variabl...
CKEditor instance already exists
... Don't use CKEDITOR.remove because it only clears the element from the array, but leaves all the DOM in memory. It's stated in the docs that it's meant for internal use: docs.cksource.com/ckeditor_api/symbols/CKEDITOR.html#.remove You should use instead instace.destroy() as madhaviaddan...
In Django, how do I check if a user is in a certain group?
...
You can access the groups simply through the groups attribute on User.
from django.contrib.auth.models import User, Group
group = Group(name = "Editor")
group.save() # save this new group for this example
user = User.objects.get(pk = 1) # assuming, there is one initial user
...