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Can I start the iPhone simulator without “Build and Run”?
... get a long log output that takes a while because of a bug I'm trying to fix. I'd like to avoid that.
10 Answers
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Remove duplicates in the list using linq
...temComparer : IEqualityComparer<Item> {
public bool Equals(Item x, Item y) {
return x.Id == y.Id &&
x.Name == y.Name &&
x.Code == y.Code &&
x.Price == y.Price;
}
public int GetHashCode(Item obj) {
return ...
Factors in R: more than an annoyance?
One of the basic data types in R is factors. In my experience factors are basically a pain and I never use them. I always convert to characters. I feel oddly like I'm missing something.
...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...N博客：http://blog.csdn.net/zjl_1026_2001/archive/2008/04/03/2246510.aspx
static_cast和reinterpret_cast揭秘
本文讨论static_cast<> 和 reinterpret_cast<>。
reinterpret_cast可以转换任意一个32bit整数，包括所有的指针和整数。可以把任何整数转成指针，也...
Advanced JavaScript: Why is this function wrapped in parentheses? [duplicate]
... Why do I get "1" when I run this code? What is this strange little appendix of (1) and why is the function wrapped in parentheses?
...
Floating View 扩展：悬浮视图扩展，将组件转换为悬浮窗口 · App Inventor 2 中文网
...
下载链接
扩展文件：
com.jdl.FloatingView.aix
示例文件：
FloatingView.aia
功能概述
扩展特性
悬浮窗口：将任意可见组件转换为悬浮视图
跨应用显示：在其他应用上层保持显...
Performance surprise with “as” and nullable types
...cient. One rule that really helps there is that an object can only be unboxed to a variable that has the same type as the boxed value. That allows the JIT compiler to generate very efficient code, no value conversions have to be considered.
The is operator test is easy, just check if the object i...
How to get the index of an element in an IEnumerable?
...iterate over the contents. As such, there isn't really a concept of an index. What you are doing really doesn't make a lot of sense for an IEnumerable. If you need something that supports access by index, put it in an actual list or collection.
...
Purpose of Python's __repr__
...__repr__ is more for developers while __str__ is for end users.
A simple example:
>>> class Point:
... def __init__(self, x, y):
... self.x, self.y = x, y
... def __repr__(self):
... return 'Point(x=%s, y=%s)' % (self.x, self.y)
>>> p = Point(1, 2)
>>> p
Poin...
Why does += behave unexpectedly on lists?
The += operator in python seems to be operating unexpectedly on lists. Can anyone tell me what is going on here?
8 Answe...