大约有 41,000 项符合查询结果（耗时：0.0506秒） [XML]
Sql Server equivalent of a COUNTIF aggregate function
I'm building a query with a GROUP BY clause that needs the ability to count records based only on a certain condition (e.g. count only records where a certain column value is equal to 1).
...
Is there an expression for an infinite generator?
Is there a straight-forward generator expression that can yield infinite elements?
7 Answers
...
“Invalid signature file” when attempting to run a .jar
My java program is packaged in a jar file and makes use of an external jar library, bouncy castle . My code compiles fine, but running the jar leads to the following error:
...
ActionController::InvalidAuthenticityToken
Below is an error, caused by a form in my Rails application:
24 Answers
24
...
Split List into Sublists with LINQ
Is there any way I can separate a List<SomeObject> into several separate lists of SomeObject , using the item index as the delimiter of each split?
...
How to [recursively] Zip a directory in PHP?
Directory is something like:
12 Answers
12
...
Concatenate multiple files but include filename as section headers
I would like to concatenate a number of text files into one large file in terminal. I know I can do this using the cat command. However, I would like the filename of each file to precede the "data dump" for that file. Anyone know how to do this?
...
How do I add a bullet symbol in TextView?
I have a TextView and I want to add a bullet symbol in my text through XML. Is it possible?
9 Answers
...
log4j vs logback [closed]
We are using log4j behind a selfmade wrapper. We plan to use much more features of it now.
6 Answers
...
Input and Output binary streams using JERSEY?
I'm using Jersey to implement a RESTful API that is primarily retrieve and serve JSON encoded data. But I have some situations where I need to accomplish the following:
...