大约有 44,000 项符合查询结果（耗时：0.0716秒） [XML]
Cast a Double Variable to Decimal
...
You only use the M for a numeric literal, when you cast it's just:
decimal dtot = (decimal)doubleTotal;
Note that a floating point number is not suited to keep an exact value, so if you first add numbers together and then convert to Decimal ...
How to synchronize a static variable among threads running different instances of a class in Java?
I know that using the synchronize keyword before a method brings synchronization to that object. That is, 2 threads running the same instance of the object will be synchronized.
...
Cannot pass null argument when using type hinting
...making null a valid argument in this case. 2: Php is using a default value for an argument to specify that null is allowable, this is obscure and it makes a mandatory parameter impossible even if the developer wants to force a null to be explicitly passed.
– Henry
...
Auto-loading lib files in Rails 4
...
@ifyouseewendy how can I include files before models are loaded? add the path to autoload it's cool, but how control the order of inclusion? thx
– Matrix
Oct 16 '14 at 15:51
...
Return two and more values from a method
...
You should use code formatting, not text formatting. Indent lines four spaces and the weirdness caused by irb's >> prompt will go away.
– Chris Lutz
Dec 25 '09 at 15:31
...
Why does Go have a “goto” statement
...always been taught that 'goto' statements are a thing of the past and evil for it occludes the actual flow of a program, and that functions or methods are always a better way of controlling flow.
...
.gitignore file, where should I put it in my xcode project?
...ave changes or are new into the repository will not be shown to as waiting for commit.
You can also have one global local git ignore file, that will manage all of your git repositories.
git config --global core.excludesfile ~/.gitignore_global
This alternative is particularly interesting for igno...
Unable to type in Visual Studio
...ed to me. Do you have ReSharper? If so, the solution I found here may work for you. From Alexander's comment in the accepted answer:
Try cleaning R# caches C:\Users{User
Name}\AppData\Local\JetBrains\ReSharper\v8.2\SolutionCaches\ and then
reopen the solution
From below comment - that's %...
What is the difference between persist() and merge() in JPA and Hibernate?
... becomes managed. The entity X will be
entered into the database at or before
transaction commit or as a result of
the flush operation.
If X is a
preexisting managed entity, it is
ignored by the persist operation.
However, the persist operation is
cascaded to entities referenced by X...
Difference between Document-based and Key/Value-based databases?
...e than key-value stores
Although there is some debate on the correct name for databases such as Cassandra, I'd like to call them column-family stores. Although key-value pairs are an essential part of Cassandra, it's not limited to just that. It allows you to nest key-value pairs, so a key could re...