大约有 45,000 项符合查询结果（耗时：0.0462秒） [XML]
Difference between array_map, array_walk and array_filter
...nput array(s) while array_walk can; in particular, array_map never changes its arguments.
Array Keys Access:
array_map cannot operate with the array keys, array_walk can.
Return Value:
array_map returns a new array, array_walk only returns true. Hence, if you don't want to create an array as a...
What is the difference between a framework and a library?
...example, on Mac OS X frameworks are just libraries, packed into a bundle. Within the bundle you will find an actual dynamic library (libWhatever.dylib). The difference between a bare library and the framework on Mac is that a framework can contain multiple different versions of the library. It can c...
Explaining Apache ZooKeeper
I am trying to understand ZooKeeper, how it works and what it does. Is there any application which is comparable to ZooKeeper?
...
Can we add a inside H1 tag?
Is it a proper method to use span tag inside H1 tag?
8 Answers
8
...
Multiple returns from a function
Is it possible to have a function with two returns like this:
31 Answers
31
...
To underscore or to not to underscore, that is the question
Are there any problems with not prefixing private fields with an underscore in C# if the binary version is going to be consumed by other framework languages? For example since C# is case-sensitive you can call a field "foo" and the public property "Foo" and it works fine.
...
When should I use a struct instead of a class?
...oosing Between Classes and Structures.
Basically, that page gives you a 4-item checklist and says to use a class unless your type meets all of the criteria.
Do not define a structure unless the
type has all of the following
characteristics:
It logically represents a single value,...
How to prevent multiple instances of an Activity when it is launched with different Intents
I've come across a bug in my application when it is launched using the "Open" button on the Google Play Store app (previously called Android Market). It seems that launching it from the Play Store uses a different Intent than launching it from the phone's application menu of icons. This is leadi...
What is the difference between Serialization and Marshaling?
...ques (such as RPC), the term "Marshaling" is used but don't understand how it differs from Serialization. Aren't they both transforming objects into series of bits?
...
Why do we need private subnet in VPC?
...re previously, the common solution was an EC2 instance on a public subnet within the VPC, functioning as a "NAT instance," providing network address translation (technically, port address translation) for instances in other, private subnets, allowing those machines to use the NAT instance's public I...