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关于php的socket初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... ($errno)");
stream_set_blocking($socket_server, 0); // 非阻塞
$base = event_base_new();
$event = event_new();
event_set($event, $socket_server, EV_READ | EV_PERSIST, array(__CLASS__, 'ev_accept'), $base);
event_base_set($event, $base);
event_add($event);
event_base_loop($base);...
How can I check if a file exists in Perl?
...r something exists at given path using the -e file-test operator.
print "$base_path exists!\n" if -e $base_path;
However, this test is probably broader than you intend. The code above will generate output if a plain file exists at that path, but it will also fire for a directory, a named pipe, a ...
What are WSDL, SOAP and REST?
... It actually stands for Web Services Description Language.
SOAP is an XML-based protocol that lets you exchange info over a particular protocol (can be HTTP or SMTP, for example) between applications. It stands for Simple Object Access Protocol and uses XML for its messaging format to relay the in...
What techniques can be used to define a class in JavaScript, and what are their trade-offs?
...ere is no such thing as classes in JavaScript. JavaScript uses a prototype-based inheritance scheme.
In addition, there are numerous popular JavaScript libraries that have their own style of approximating class-like functionality in JavaScript. You'll want to check out at least Prototype and jQue...
How to make my custom type to work with “range-based for loops”?
...he different features that C++11 brings. One of my favorites is the "range-based for loops".
8 Answers
...
Rails 3 execute custom sql query without a model
I need to write a standalone ruby script that is supposed to deal with database. I used code given below in rails 3
5 Answe...
What is the purpose of the “final” keyword in C++11 for functions?
...ady mentioned in a comment is that if you are overriding a function from a base class, then you cannot possibly mark it as non-virtual:
struct base {
virtual void f();
};
struct derived : base {
void f() final; // virtual as it overrides base::f
};
struct mostderived : derived {
//vo...
Difference between a virtual function and a pure virtual function [duplicate]
...
A virtual function makes its class a polymorphic base class. Derived classes can override virtual functions. Virtual functions called through base class pointers/references will be resolved at run-time. That is, the dynamic type of the object is used instead of its static t...
Android encryption / decryption using AES [closed]
...ithHmacSHA1 derivation is used as it is more secured.
import android.util.Base64;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.cry...
C++ inheritance - inaccessible base?
I seem to be unable to use a base class as a function parameter, have I messed up my inheritance?
2 Answers
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