大约有 47,000 项符合查询结果（耗时：0.0754秒） [XML]
What are the differences between vector and list data types in R?
What are the main differences between vector and list data types in R? What are the advantages or disadvantages of using (or not) these two data types?
...
Enable SQL Server Broker taking too long
I have a Microsoft SQL server 2005 and I tried to enable Broker for my database with those T-SQL:
4 Answers
...
How can I use redis with Django?
I've heard of redis-cache but how exactly does it work? Is it used as a layer between django and my rdbms, by caching the rdbms queries somehow?
...
Passing HTML to template using Flask/Jinja2
I'm building an admin for Flask and SQLAlchemy, and I want to pass the HTML for the different inputs to my view using render_template . The templating framework seems to escape the html automatically, so all
...
MySQL error: key specification without a key length
I have a table with a primary key that is a varchar(255). Some cases have arisen where 255 characters isn't enough. I tried changing the field to a text, but I get the following error:
...
Parsing IPv6 extension headers containing unknown extensions
I'm writing a very simple net filter, and getting to where I want to parse IPv6 headers to match things like ICMPv6 types, TCP/UDP port numbers, etc.
...
CursorLoader usage without ContentProvider
Android SDK documentation says that startManagingCursor() method is depracated:
5 Answers
...
Difference between Xcode version (CFBundleShortVersionString) and build (CFBundleVersion)
...
4 Answers
4
Active
...
How to add multiple objects to ManyToMany relationship at once in Django ?
Based on the Django doc, I should be able to pass multiple objects at once to be added to a manytomany relationship but I get a
...
Difference between as.POSIXct/as.POSIXlt and strptime for converting character vectors to POSIXct/PO
I have followed a number of questions here that asks about how to convert character vectors to datetime classes. I often see 2 methods, the strptime and the as.POSIXct/as.POSIXlt methods. I looked at the 2 functions but am unclear what the difference is.
...