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比尔盖茨“未来生活预言”的科技豪宅（图） - 资讯 - 清泛网 - 专注C/C++及内核技术
...，堪称聚拢财气、卧虎藏龙的风水宝地。占地当然极为庞大，66000平方英亩，相当于几十个足球场。
据说，土木工程干了整整七年，比尔先生先后砸进去了九千七百万美元，足够买下一家中型的上市公司了。
这座毫宅共...
How to create custom easing function with Core Animation?
...
I found this:
Cocoa with Love - Parametric acceleration curves in Core Animation
But I think it can be made a little simpler and more readable by using blocks. So we can define a category on CAKeyframeAnimation that looks something like this:
CAKeyframeAnimation+Parametric.h:
// this sho...
Secure hash and salt for PHP passwords
...nism.
PHP 5.5 or higher: password_hash() is good quality and part of PHP core.
Older PHP versions: OpenWall's phpass library is much better than most custom code - used in WordPress, Drupal, etc.
Most programmers just don't have the expertise to write crypto related code safely without introduci...
CDC:DrawText 多行显示文本（文本自动换行） - C++ UI - 清泛IT社区，为创新赋能！
...为此字符串增加4个字符，存放字符串的缓冲区必须足够大，能容纳附加的字符。
nCount：指向字符串中的字符数。如果nCount为C1，则lpString指向的字符串被认为是以\0结束的，DrawText会自动计算字符数。
lpR...
为什么你越努力，却越焦虑？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
为什么你越努力，却越焦虑？文 | 山羊月（Essex大学环境社会学资深博士）我并不是心理学专业，只是看到这个题目有感而发，想结合自己的情况谈谈。如果有所疏漏偏颇，...
文 | 山羊月（Essex大学环境社会学资深博士）
我...
Programmatically saving image to Django ImageField
...ff the web and stores it in a model. The important bits are:
from django.core.files import File # you need this somewhere
import urllib
# The following actually resides in a method of my model
result = urllib.urlretrieve(image_url) # image_url is a URL to an image
# self.photo is the ImageFie...
django import error - No module named core.management
Ok, I see plenty of these errors around. I have tried everything I know to do and have yet to figure this out.
29 Answers
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How can I get a count of the total number of digits in a number?
... all possible input values. They also work for .NET Framework and for .NET Core. There are however relevant performance differences (discussed below), depending on your choice of Platform / Framework.
Int32 version:
public static class Int32Extensions
{
// IF-CHAIN:
public static int Digit...
C++11 introduced a standardized memory model. What does it mean? And how is it going to affect C++ p
...ch constituent thread, as if the threads were time-multiplexed on a single-core processor.
That global memory order can vary from one run of the program to another and may not be known beforehand. The characteristic feature of SC is the set of horizontal slices in the address-space-time diagram rep...
数据结构、算法复杂度一览表 - 更多技术 - 清泛网 - 专注IT技能提升
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堆
时间复杂度
堆调整
最大值查找
Extract Max
Increase Key
插入
删除
合并
链表(已排序)
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O(1)
O(1)
O(n)
O(n)
O(1)
O(m+n)
链表(未排序)
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O(n)
O(n)
O(1)
O(1)
...