大约有 41,000 项符合查询结果（耗时：0.0618秒） [XML]
How to check if a user is logged in (how to properly use user.is_authenticated)?
... Yokhen
3,86188 gold badges2626 silver badges4343 bronze badges
answered Sep 5 '10 at 3:32
Brian NealBrian Neal
28.3k66 gol...
Find number of months between two Dates in Ruby on Rails
...
Miscreant
4,47633 gold badges1818 silver badges2121 bronze badges
answered Feb 24 '12 at 9:53
Massimiliano Pelu...
How to test equality of Swift enums with associated values
...
Swift 4.1+
As @jedwidz has helpfully pointed out, from Swift 4.1 (due to SE-0185, Swift also supports synthesizing Equatable and Hashable for enums with associated values.
So if you're on Swift 4.1 or newer, the following will au...
How do I save a stream to a file in C#?
...by Tilendor in Jon Skeet's answer, streams have a CopyTo method since .NET 4.
var fileStream = File.Create("C:\\Path\\To\\File");
myOtherObject.InputStream.Seek(0, SeekOrigin.Begin);
myOtherObject.InputStream.CopyTo(fileStream);
fileStream.Close();
Or with the using syntax:
using (var fileStream...
How to get the last day of the month?
...
1134
I didn't notice this earlier when I was looking at the documentation for the calendar module, bu...
How to keep one variable constant with other one changing with row in excel
...
344
Use this form:
=(B0+4)/$A$0
The $ tells excel not to adjust that address while pasting the f...
Check if value exists in Postgres array
...
Erwin BrandstetterErwin Brandstetter
439k9696 gold badges809809 silver badges969969 bronze badges
...
How do I create a namespace package in Python?
...ce packages.
Python 3.3 introduces implicit namespace packages, see PEP 420.
This means there are now three types of object that can be created by an import foo:
A module represented by a foo.py file
A regular package, represented by a directory foo containing an __init__.py file
A namespace p...
What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it?
...
4 Answers
4
Active
...
What is the difference between UTF-8 and Unicode?
...bits. Examples of these encodings would be UCS2 (2 bytes = 16 bits) and UCS4 (4 bytes = 32 bits). They suffer from inherently the same problem as the ASCII and ISO-8859 standards, as their value range is still limited, even if the limit is vastly higher.
The other type of encoding uses a variable n...