大约有 40,750 项符合查询结果（耗时：0.0639秒） [XML]
What does the JSLint error 'body of a for in should be wrapped in an if statement' mean?
I used JSLint on a JavaScript file of mine. It threw the error:
8 Answers
8
...
Is there any Rails function to check if a partial exists?
When I render a partial which does not exists, I get an Exception. I'd like to check if a partial exists before rendering it and in case it doesn't exist, I'll render something else. I did the following code in my .erb file, but I think there should be a better way to do this:
...
I just discovered why all ASP.Net websites are slow, and I am trying to work out what to do about it
I just discovered that every request in an ASP.Net web application gets a Session lock at the beginning of a request, and then releases it at the end of the request!
...
What is the most efficient Java Collections library? [closed]
What is the most efficient Java Collections library?
12 Answers
12
...
Entity Framework: “Store update, insert, or delete statement affected an unexpected number of rows (
I am using Entity Framework to populate a grid control. Sometimes when I make updates I get the following error:
45 Answers...
How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L
Since setting up my development environments on Mac OS X Lion (brand new macbook air purchased in January 2012), I have noticed that resolving to a virtual host is very slow (around 3 seconds) the first time but after that is fast as long as I continue loading it regularly.
...
How to get child element by class name?
I'm trying to get the child span that has a class = 4. Here is an example element:
17 Answers
...
Warning: Found conflicts between different versions of the same dependent assembly
I am currently developing a .NET application, which consists of 20 projects. Some of those projects are compiled using .NET 3.5, some others are still .NET 2.0 projects (so far no problem).
...
Error: could not find function … in R
I am using R and tried some.function but I got following error message:
10 Answers
1...
An App ID with Identifier '' is not available. Please enter a different string
I am trying to add a new APP ID to prepare for App Store submission and got the following error under the bundle ID I provided.
...