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public friend swap member function
...we should provide (and std::vector<> should have provided) a specialization of std::swap, right?
namespace std
{
template <> // important! specialization in std is OK, overloading is UB
void swap(myclass&, myclass&)
{
// swap
}
}
Well that would certain...
What do
...
These are called generalized type constraints. They allow you, from within a type-parameterized class or trait, to further constrain one of its type parameters. Here's an example:
case class Foo[A](a:A) { // 'A' can be substituted with any type
...
GridLayout and Row/Column Span Woe
... each col defining a width. For extra flexibility, I imagine these Space sizes could be set in code to provide something similar to weights. I tried to add a screenshot, but I do not have the reputation necessary.
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:lay...
Why are margin/padding percentages in CSS always calculated against width?
...Kinal
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1
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When to use std::forward to forward arguments?
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Fibbles
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answered Aug 31 '11 at 13:05
Kerrek SBKerrek SB
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Is “inline” without “static” or “extern” ever useful in C99?
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answered Jun 10 '11 at 22:48
NemoNemo
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In Java, how do I call a base class's method from the overriding method in a derived class?
...constructor.
super(parameter list); // calls base class parameterized constructor.
super.method(); // calls base class method.
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How to create empty data frame with column names specified in R? [duplicate]
...ength variables
eg
nodata <- data.frame(x= numeric(0), y= integer(0), z = character(0))
str(nodata)
## 'data.frame': 0 obs. of 3 variables:
## $ x: num
## $ y: int
## $ z: Factor w/ 0 levels:
or to create a data.frame with 5 columns named a,b,c,d,e
nodata <- as.data.frame(setNa...
ngModel Formatters and Parsers
...n a related question: How to do two-way filtering in AngularJS?
To summarize:
Formatters change how model values will appear in the view.
Parsers change how view values will be saved in the model.
Here is a simple example, building on an example in the NgModelController api documentation:
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覆盖equal时的通用约定 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...对称性：x.equal(y) = y.equal(x);
3、传递性：x.equal(y) = y.equal(z) = x.equal(z);
4、一致性：x.equal(y) 不改变值的情况下多次调用结果一致。
（假定x, y, z非null）
覆盖 equal 约定