大约有 40,000 项符合查询结果（耗时：0.0615秒） [XML]
CPU Privilege Rings: Why rings 1 and 2 aren't used?
...vice drivers at that level, so they are privileged, but somewhat separated from the rest of the kernel code.
Rings 1 and 2 are in a way, "mostly" privileged. They can access supervisor pages, but if they attempt to use a privileged instruction, they still GPF like ring 3 would. So it is not a bad p...
What does enumerate() mean?
...ts counting at 0 but if you give it a second integer argument, it'll start from that number instead:
>>> for count, elem in enumerate(elements, 42):
... print count, elem
...
42 foo
43 bar
44 baz
If you were to re-implement enumerate() in Python, here are two ways of achieving that;...
How do I go straight to template, in Django's urls.py?
... the class based generic views but register with the django 2.0+ pattern.
from django.urls import path
from django.views.generic import TemplateView
urlpatterns = [
path('foo/', TemplateView.as_view(template_name='foo.html'))
]
https://docs.djangoproject.com/en/2.0/ref/class-based-views/base...
How do I remove a substring from the end of a string in Python?
...p(y) treats y as a set of characters and strips any characters in that set from the ends of x.
Instead, you could use endswith and slicing:
url = 'abcdc.com'
if url.endswith('.com'):
url = url[:-4]
Or using regular expressions:
import re
url = 'abcdc.com'
url = re.sub('\.com$', '', url)
...
CSS @font-face - what does “src: local('☺')” mean?
I'm using @font-face for the first time and downloaded a font-kit from fontsquirrel
3 Answers
...
How to set layout_weight attribute dynamically from code?
... value for the attribute layout_weight for button in android dynamically from java code ?
9 Answers
...
Set time to 00:00:00
...t cannot represent a moment as it lacks any concept of time zone or offset-from-UTC. Calling LocalDateTime.now almost never makes sense. Use ZonedDateTime instead. Otherwise you are ignoring crucial time zone issues. For one thing, some dates in some zones do not start at 00:00!
...
Finding the max value of an attribute in an array of objects
...Note that this returns the object that had the max value not the max value from the object. This may or may not be what you want. In my case it was what I wanted. +1
– John
Nov 24 '17 at 23:46
...
Android: What's the difference between Activity.runOnUiThread and View.post?
...int the JavaDoc for View.java did wrongly state that "View.post only works from another thread when the View is attached to a window". This was fixed on Oct. 15, 2012, but took a while to penetrate the minds of Android developers.
– Alex Cohn
Jun 26 '16 at 11:5...
Most efficient way to convert an HTMLCollection to an Array
... programmer's ken.
Edit
Since ECMAScript 2015 (ES 6) there is also Array.from:
var arr = Array.from(htmlCollection);
Edit
ECMAScript 2015 also provides the spread operator, which is functionally equivalent to Array.from (although note that Array.from supports a mapping function as the second a...