大约有 30,000 项符合查询结果（耗时：0.0391秒） [XML]
Can I set null as the default value for a @Value in Spring?
... NOTSET).
crap=NOTSET
null is very bad and is different than NOTSET. It means spring or unit test did not set it which is why there is IMHO a difference. I still would probably use the setter notation (previous example) as its easier to unit test (private variables are hard to set in a unit test)...
Check if a value exists in pandas dataframe index
...
@MaximG What do you mean? This works for a non-unique index as well.
– joris
Jul 30 '15 at 15:40
...
How to make inline functions in C#
...
The answer to your question is yes and no, depending on what you mean by "inline function". If you're using the term like it's used in C++ development then the answer is no, you can't do that - even a lambda expression is a function call. While it's true that you can define inline lambda...
iPhone - Grand Central Dispatch main thread
...ync?
dispatch_async
will dispatch the block to a queue asynchronously. Meaning it will send the block to the queue and not wait for it to return before continuing on the execution of the remaining code in your method.
dispatch_sync
will dispatch the block to a queue synchronously. This will ...
What is a memory fence?
What is meant by using an explicit memory fence?
4 Answers
4
...
B-Tree vs Hash Table
...
Can you explain more on the index rebuilding? Does it mean that for x days while the index rebuilds, the table is totally unavailable for use during that period?
– Pacerier
Jul 5 '12 at 23:11
...
Rails: confused about syntax for passing locals to partials
...
im not an expert by any means, but I use Aptana studio. It's built on the same platform as eclipse (if you're familiar). It allows you to "click" and trace like you said. You can also do in-code search and it has built in terminal, etc. Caution - it...
Transactions in .net
...tion) is tied directly to the db connection (such as SqlConnection), which means that you have to keep passing the connection around - OK in some cases, but doesn't allow "create/use/release" usage, and doesn't allow cross-db work. An example (formatted for space):
using (IDbTransaction tran = conn...
grid controls for ASP.NET MVC? [closed]
... It should be noted that the terms of their Open Source product means it should only be used on GPLv2 Compatible Open Source projects. That rules out a lot of commercial applications - if you want to stay legal :)
– James McCormack
May 11 '12 at 8:55...
Do I set properties to nil in dealloc when using ARC?
...management.
In MRR, you should release your ivars. Nilling out properties means calling setters, which may invoke code that it shouldn't touch in dealloc (e.g. if your class, or a subclass, overrides the setter). Similarly it may trigger KVO notifications. Releasing the ivar instead avoids these un...