大约有 47,000 项符合查询结果（耗时：0.0593秒） [XML]
What does gcc's ffast-math actually do?
I understand gcc's --ffast-math flag can greatly increase speed for float ops, and goes outside of IEEE standards, but I can't seem to find information on what is really happening when it's on. Can anyone please explain some of the details and maybe give a clear example of how something would chan...
How to set custom favicon in Express?
I recently started working in Node.js and in the app.js file there is this line:
13 Answers
...
What is the difference between lock and Mutex?
What is the difference between lock and Mutex? Why can't they be used interchangeably?
7 Answers
...
Render Partial View Using jQuery in ASP.NET MVC
... however, call a method (action) that will render the partial view for you and add it to the page using jQuery/AJAX. In the below, we have a button click handler that loads the url for the action from a data attribute on the button and fires off a GET request to replace the DIV contained in the par...
Is there a Python caching library?
...nything so far. I need a simple dict -like interface where I can set keys and their expiration and get them back cached. Sort of something like:
...
How many bits or bytes are there in a character? [closed]
...
It depends what is the character and what encoding it is in:
An ASCII character in 8-bit ASCII encoding is 8 bits (1 byte), though it can fit in 7 bits.
An ISO-8895-1 character in ISO-8859-1 encoding is 8 bits (1 byte).
A Unicode character in UTF-8 encodin...
Java: difference between strong/soft/weak/phantom reference
I have read this article about the topic, but I don't really understand it.
Please give me some advice along with examples when describing the concepts.
...
How to run Django's test database only in memory?
...
if 'test' in sys.argv:
DATABASES['default'] = {'ENGINE': 'sqlite3'}
And finally in Django 1.3 and 1.4:
if 'test' in sys.argv:
DATABASES['default'] = {'ENGINE': 'django.db.backends.sqlite3'}
(The full path to the backend isn't strictly necessary with Django 1.3, but makes the setting fo...
Pandas - Get first row value of a given column
...2
There is a difference between df_test['Btime'].iloc[0] (recommended) and df_test.iloc[0]['Btime']:
DataFrames store data in column-based blocks (where each block has a single
dtype). If you select by column first, a view can be returned (which is
quicker than returning a copy) and the origina...
How to pass json POST data to Web API method as an object?
...s well. The major difference is, In asp.net core, both web api controllers and Mvc controllers are merged together to single controller model. So your return type might be IActionResult or one of it's implementation (Ex :OkObjectResult)
Use
contentType:"application/json"
You need to use JSON....