大约有 40,740 项符合查询结果（耗时：0.0299秒） [XML]
LINQ: Not Any vs All Don't
Often I want to check if a provided value matches one in a list (e.g. when validating):
8 Answers
...
Is it better to return null or empty collection?
That's kind of a general question (but I'm using C#), what's the best way (best practice), do you return null or empty collection for a method that has a collection as a return type ?
...
The multi-part identifier could not be bound
I've seen similar errors on SO, but I don't find a solution for my problem.
I have a SQL query like:
15 Answers
...
wkhtmltopdf: cannot connect to X server
I have been using wkthmltopdf to convert html to pdf documents on-the-fly on my linux web server. The program originally needed X11 or similar X server to run correctly, but through many requests by developers to have this run on servers without GUI, I am pretty sure it runs a virtual X server in...
How do I create multiple submit buttons for the same form in Rails?
I need to have multiple submit buttons.
7 Answers
7
...
Test method is inconclusive: Test wasn't run. Error?
I have a test class and below I have posted a sample test from the test class
49 Answers
...
java: ArrayList - how can i check if an index exists?
I'm using ArrayList<String> and I add data at specific indices,
how can I check if a specific index exists?
11 Ans...
data.frame rows to a list
I have a data.frame which I would like to convert to a list by rows, meaning each row would correspond to its own list elements. In other words, I would like a list that is as long as the data.frame has rows.
...
undefined reference to `WinMain@16'
When I try to build a program using Eclipse CDT , I get the following:
6 Answers
6
...
How to prevent ajax requests to follow redirects using jQuery
I use the jQuery ajax functions to access a web service, but the server, instead of returning a response with a status code describing a problem, the request is redirected to a page with a 200 header, describing the problem. I can't make any changes to this, so I need to solve it on the client someh...