大约有 1,970 项符合查询结果（耗时：0.0327秒） [XML]
Why do we need message brokers like RabbitMQ over a database like PostgreSQL?
...so use the disk to temporarily store messages if it runs out of RAM. After 2.0, Rabbit has significantly improved on its RAM usage. Clustering options are also available.
In regards to AMQP, I would say a really cool feature is the "exchange", and the ability for it to route to other exchanges. Th...
When & why to use delegates? [duplicate]
...ctly. For more information, see Covariance and Contra variance.
C# version 2.0 introduces the concept of Anonymous Methods, which permit code blocks to be passed as parameters in place of a separately defined method.
share...
JavaScript unit test tools for TDD
...o dependencies. There is a very good description of it at Unit testing Web 2.0 applications using the Dojo Objective Harness.
If you want to automate the UI testing (a sore point of many developers) — check out doh.robot (temporary down. update: other link http://dojotoolkit.org/reference-guide/u...
Why doesn't the JVM cache JIT compiled code?
...
Excelsior JET has a caching JIT compiler since version 2.0, released back in 2001. Moreover, its AOT compiler may recompile the cache into a single DLL/shared object using all optimizations.
share
...
Why JSF saves the state of UI components on server?
...n give the appserver 125% ~ 150% of maximum measured memory.
Note that JSF 2.0 has improved a lot in state management. It's possible to save partial state (e.g. only the <h:form> will be saved instead of the whole stuff from <html> all the way to the end). Mojarra for example does that. ...
Strange out of memory issue while loading an image to a Bitmap object
... doesn't raise 2 to a power, it xors 2 with the result. You want Math.pow(2.0, ...). Otherwise, this looks good.
– DougW
Oct 13 '10 at 7:42
7
...
What is the meaning of single and double underscore before an object name?
...robably shouldn’t use this (e.g., because you might change it in version 2.0, or even 1.1); use explicit __all__ whenever you want to make the module from spam import * friendly (including at the interactive interpreter). So most of the time, the answer is both.
– abarnert
...
What is the JavaScript equivalent of var_dump or print_r in PHP? [duplicate]
...number":
/* there is absolutely no way in JS to distinguish 2 from 2.0
so 'number' is the best that you can do. The following doesn't work:
var er = /^[0-9]+$/;
if (!isNaN(v) && v % 1 === 0 && er.test(3.0)) {
out = 'int';
...
What's the difference between IEquatable and just overriding Object.Equals()?
...
The main reason is performance. When generics were introduced in .NET 2.0 they were able to add a bunch of neat classes such as List<T>, Dictionary<K,V>, HashSet<T>, etc. These structures make heavy use of GetHashCode and Equals. But for value types this required boxing. IEqua...
How do pointer to pointers work in C?
...
I like this "real world" code example of pointer to pointer usage, in Git 2.0, commit 7b1004b:
Linus once said:
I actually wish more people understood the really core low-level kind of coding. Not big, complex stuff like the lockless name lookup, but simply good use of pointers-to-pointers etc.
F...