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Checking for NULL pointer in C/C++ [closed]
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In my experience, tests of the form if (ptr) or if (!ptr) are preferred. They do not depend on the definition of the symbol NULL. They do not expose the opportunity for the accidental assignment. And they are clear and succinct.
Edit: As SoapBox points out in a c...
Maximum packet size for a TCP connection
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According to http://en.wikipedia.org/wiki/Maximum_segment_size, the default largest size for a IPV4 packet on a network is 536 octets (bytes of size 8 bits). See RFC 879
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NGINX to reverse proxy websockets AND enable SSL (wss://)?
...release 1.3.13. Example of use:
location /websocket/ {
proxy_pass http://backend_host;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_read_timeout 86400;
}
You can also check the nginx changelog and the WebSock...
When is it appropriate to use UDP instead of TCP? [closed]
... reliable delivery hand-shaking that's less overhead than TCP. Read this: http://en.wikipedia.org/wiki/Reliable_User_Datagram_Protocol
UDP is useful for broadcasting information in a publish-subscribe kind of application. IIRC, TIBCO makes heavy use of UDP for notification of state change.
Any o...
Is std::vector copying the objects with a push_back?
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that said, you should not use std::auto_ptr in stl containers, for more info : why-is-it-wrong-to-use-stdauto-ptr-with-standard-containers
– OriginalCliche
Apr 11 '13 at 18:48
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WebSockets protocol vs HTTP
There are many blogs and discussions about websocket and HTTP, and many developers and sites strongly advocate websockets, but i still can not understand why.
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Difference between TCP and UDP?
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The Law of Leaky Abstractions
by Joel Spolsky
http://www.joelonsoftware.com/articles/LeakyAbstractions.html
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TCP: can two different sockets share a port?
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TCP / HTTP Listening On Ports: How Can Many Users Share the Same Port
So, what happens when a server listen for incoming connections on a TCP port? For example, let's say you have a web-server on port 80. Let's assume that your co...
Move capture in lambda
... following will be legal code in C++14:
using namespace std;
// a unique_ptr is move-only
auto u = make_unique<some_type>( some, parameters );
// move the unique_ptr into the lambda
go.run( [ u{move(u)} ] { do_something_with( u ); } );
But it is much more general in the sense that capt...
std::function and std::bind: what are they, and when should they be used?
...nt you to these two links for further details:
Lambda functions in C++11:
http://www.nullptr.me/2011/10/12/c11-lambda-having-fun-with-brackets/#.UJmXu8XA9Z8
Callable entity in C++:
http://www.nullptr.me/2011/05/31/callable-entity/#.UJmXuMXA9Z8
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