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Difference between 'struct' and 'typedef struct' in C++?
...act like they are implicitly typedef'ed, as long as the name is not hidden by another declaration with the same name. See Michael Burr's answer for the full details.
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How do I write JSON data to a file?
...icit encoding is not necessary since the output of json.dump is ASCII-only by default. If you can be sure that your code is never run on legacy Python versions and you and the handler of the JSON file can correctly handle non-ASCII data, you can specify one and set ensure_ascii=False.
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What are the rules for the “…” token in the context of variadic templates?
...peated — the unpacked patterns (call them expressions now) are separated by comma ,.
It can be best understood by some examples. Suppose you have this function template:
template<typename ...T> //pack
void f(T ... args) //pack
{
// here are unpack patterns
g( args... ); //...
Mixin vs inheritance
... places than where it is used, so it is good to mitigate that disadvantage by keeping it close by.
I have personally found a mix-in necessary to use over single inheritance where we are unittesting a lot of similar code, but the test-cases are instantiated based on their inheritance of a base case...
Is Python interpreted, or compiled, or both?
...n is compiled. Not compiled to machine code ahead of time (i.e. "compiled" by the restricted and wrong, but alas common definition), "only" compiled to bytecode, but it's still compilation with at least some of the benefits. For example, the statement a = b.c() is compiled to a byte stream which, wh...
理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...__enter__() function on the resulting object is called. The value returned by this function is assigned to the variable following as. After every statement in the block is evaluated, the __exit__() function is called.
紧跟with后面的语句被求值后，返回对象的__enter__()方法被调用...
Is there a way to make HTML5 video fullscreen?
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This answer is outdated, see the answer by Sindre Sorhus (and then vote it up so that it overtakes these out of date answers)
– matt burns
Sep 27 '12 at 17:04
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ASP.NET Web API Authentication
... Authentication cookie along with the request. This cookie is usually sent by the server when authenticating (LogOn action) by calling the [FormsAuthentication.SetAuthCookie method (see MSDN).
So the client needs to perform 2 steps:
Send an HTTP request to a LogOn action by sending the username a...
When are you supposed to use escape instead of encodeURI / encodeURIComponent?
...," / ";" / "="
A percent sign is only allowed if it is directly followed by two hexdigits, percent followed by u is not allowed.
encodeURI()
Use encodeURI when you want a working URL. Make this call:
encodeURI("http://www.example.org/a file with spaces.html")
to get:
http://www.example.org/a...
How do you increase the max number of concurrent connections in Apache?
... an apache is started, it will start 2 child processes which is determined by StartServers parameter. Then each process will start 25 threads determined by ThreadsPerChild parameter so this means 2 process can service only 50 concurrent connections/clients i.e. 25x2=50. Now if more concurrent users ...