大约有 15,000 项符合查询结果（耗时：0.0343秒） [XML]
How to convert list of tuples to multiple lists?
...n conjunction with the * operator can be used to unzip a list:
Specific example:
>>> zip((1,3,5),(2,4,6))
[(1, 2), (3, 4), (5, 6)]
>>> zip(*[(1, 2), (3, 4), (5, 6)])
[(1, 3, 5), (2, 4, 6)]
Or, if you really want lists:
>>> map(list, zip(*[(1, 2), (3, 4), (5, 6)]))
[[...
Generic deep diff between two objects
...Function(obj2)) {
throw 'Invalid argument. Function given, object expected.';
}
if (this.isValue(obj1) || this.isValue(obj2)) {
return {
type: this.compareValues(obj1, obj2),
data: obj1 === undefined ? obj2 : obj1
};
}
var diff = {...
Why use static_cast(x) instead of (int)x?
...that the object is actually the descendant that you claim it is, by means external to the language (like a flag in the object). A dynamic_cast<>() is safe as long as the result is checked (pointer) or a possible exception is taken into account (reference).
A reinterpret_cast<>() (or a ...
MFC学习总结 (90个技巧) dlg 上建立View - C/C++ - 清泛网 - 专注C++内核技术
...的按钮在下面
if(m_tabsheet.m_hWnd)
m_tabsheet.ShowWindow(SW_MAXIMIZE);//显示选项卡
//加入标签，标签名由各个子对话框的标题栏决定
m_tabsheet.AddPage(&m_skatch);
//用Create来创建一个属性页
m_tabsheet.Create(this, WS_CHILD | WS_VISIBLE, WS_EX_CONTROLPAR...
How to use base class's constructors and assignment operator in C++?
...
You can explicitly call constructors and assignment operators:
class Base {
//...
public:
Base(const Base&) { /*...*/ }
Base& operator=(const Base&) { /*...*/ }
};
class Derived : public Base
{
int additional...
Fitting empirical distribution to theoretical ones with Scipy (Python)?
...least SSE between the distribution's histogram and the data's histogram.
Example Fitting
Using the El Niño dataset from statsmodels, the distributions are fit and error is determined. The distribution with the least error is returned.
All Distributions
Best Fit Distribution
Example Code
...
Why does struct alignment depend on whether a field type is primitive or user-defined?
...ess that's a multiple of 8 bytes in 64-bit mode. It occurs even when you explicitly apply the [StructLayout(LayoutKind.Sequential)] attribute. That is not supposed to happen.
You can see it by making the struct members public and appending test code like this:
var test = new RefAndTwoInt32Wr...
decorators in the python standard lib (@deprecated specifically)
... reset filter
return func(*args, **kwargs)
return new_func
# Examples
@deprecated
def some_old_function(x, y):
return x + y
class SomeClass:
@deprecated
def some_old_method(self, x, y):
return x + y
Because in some interpreters the first solution exposed (without...
Normalizing mousewheel speed across browsers
...September 2014
Given that:
Different versions of the same browser on OS X have yielded different values in the past, and may do so in the future, and that
Using the trackpad on OS X yields very similar effects to using a mouse wheel, yet gives very different event values, and yet the device diffe...
What is the copy-and-swap idiom?
...n achieving two things: avoiding code duplication, and providing a strong exception guarantee.
How does it work?
Conceptually, it works by using the copy-constructor's functionality to create a local copy of the data, then takes the copied data with a swap function, swapping the old data with the ...