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public friend swap member function
...call:
using std::swap; // allow use of std::swap...
swap(x, y); // ...but select overloads, first
// that is, if swap(x, y) finds a better match, via ADL, it
// will use that instead; otherwise it falls back to std::swap
What is a friend function? There is confusion around this area.
Before C++...
OPTION (RECOMPILE) is Always Faster; Why?
...y estimates for applying both restrictions and a poor execution plan being selected. The fix in this case would be to create a statistics object linking the two columns, which is not an expensive operation.
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What's the best way of scraping data from a website? [closed]
...y are already familiar with regexes. It's a huge mistake, use xpath or css selectors to navigate html and only use regular expressions to extract data from actual text inside an html node. This might already be obvious to you, it becomes obvious quickly if you try it but a lot of people waste a lot ...
Questions every good .NET developer should be able to answer? [closed]
... which hooks onto the custom event handler.
(XML) Load an XML document and select all of the nodes with properties x, y, and z.
(Functional programming) Create a function that accepts another function as a parameter. A Map or Fold function works really good for this.
(Reflection) Write a function wh...
What is the difference between user and kernel modes in operating systems?
...d 2 aren't used?
How is the current ring determined?
The current ring is selected by a combination of:
global descriptor table: a in-memory table of GDT entries, and each entry has a field Privl which encodes the ring.
The LGDT instruction sets the address to the current descriptor table.
See ...
How did Google manage to do this? Slide ActionBar in Android application
...would like to add sub menu items (for example check facebook app). So when selecting a menu item with a sub item, the menu needs to animate to the right. Any tips for implementing this?
– Luciano
Oct 10 '12 at 14:36
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Difference between Mock / Stub / Spy in Spock test framework
...ds that do real things. Can be used like a Stub to change return values of select methods. Can be used like a Mock to describe interactions.
def subscriber = Spy(SubscriberImpl, constructorArgs: ["Fred"])
def "should send message to subscriber"() {
when:
publisher.send("hello")
th...
用户界面（UI）组件 · App Inventor 2 中文网
...控件颜色，比如FloatingButton、TextField、Cursor、ProgressBar、Selection、Links等具体交互性的颜色。
另外附上Android Material设计图的Color说明：
主题颜色
这是用作 Android 主题部分的主要颜色，包括“屏幕”标题栏颜色...
Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
...Us can probably apply several optimization approaches in parallel and then select the one at the end that provides the best speedup. The extra instructions may be biasing the CPU to use one optimization path that is better than others.
The effect of the extra instructions probably depends on the C...
Django dynamic model fields
...y constraint, which may be inefficient on some databases.
You will need to select one of the forks, since the official package is no longer maintained and there is no clear leader.
The usage is pretty straightforward:
import eav
from app.models import Patient, Encounter
eav.register(Encounter)
e...