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Does “git fetch --tags” include “git fetch”?
... git fetch --tags fetches tags in addition to what are fetched by the same command line without the option.
See commit c5a84e9 by Michael Haggerty (mhagger):
Previously, fetch's "--tags" option was considered equivalent to specifying the refspec
refs/tags/*:refs/tags/*
on the command ...
What is the difference between a weak reference and an unowned reference?
... provide this benefit).
A weak reference allows the possibility of it to become nil (this happens automatically when the referenced object is deallocated), therefore the type of your property must be optional - so you, as a programmer, are obligated to check it before you use it (basically the compi...
Why is Go so slow (compared to Java)?
As we could see from The Computer Language Benchmarks Game in 2010:
10 Answers
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高并发服务端分布式系统设计概要 - C/C++ - 清泛网 - 专注C/C++及内核技术
...服务端分布式系统设计概要张峻崇 原创主页：http: ccixx.com 昵称：Jone Zhang我们今天要设计的系统目标很明确，针对千万级以上PV的网站，设计一套用于后台的高...张峻崇 原创 主页：http://ccixx.com 昵称：Jone Zhang
我们今天要设...
What happens to a declared, uninitialized variable in C? Does it have a value?
...in undefined behavior.
void foo() {
int x;
printf("%d", x); // the compiler is free to crash here
}
In practice, they tend to just have some nonsensical value in there initially - some compilers may even put in specific, fixed values to make it obvious when looking in a debugger - but stric...
How can HTML5 “replace” Flash? [closed]
...hat people loosely refer to HTML5 in the context of this discussion is the combination of HTML as a markup language, CSS which specifies how it is rendered, and the javascript code which manipulates the HTML and CSS dynamically.
Furthermore, HTML5 not only has the standard text elements, but also &...
Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
... Using a virtual DOM to generate a real DOM patch
In React, each of your components have a state. This state is like an observable you might find in knockout or other MVVM style libraries. Essentially, React knows when to re-render the scene because it is able to observe when this data changes. Di...
Insert, on duplicate update in PostgreSQL?
... edited May 23 '17 at 11:54
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answered Jul 10 '09 at 12:18
Stephen DenneStephe...
Is there a “previous sibling” selector?
...On a related note, ~ is for general successor sibling (meaning the element comes after this one, but not necessarily immediately after) and is a CSS3 selector. + is for next sibling and is CSS2.1.
See Adjacent sibling combinator from Selectors Level 3 and 5.7 Adjacent sibling selectors from Cascadi...
When should the volatile keyword be used in C#?
...n the original):
In C#, "volatile" means not only "make sure that the compiler and the
jitter do not perform any code reordering or register caching
optimizations on this variable". It also means "tell the processors to
do whatever it is they need to do to ensure that I am reading the
l...