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Network Programming(1)
It is important to realize that clients and servers are processes and not ma- chines, or hosts as they are often called in this context. Data received ...
分类:Web程序   时间:2018-07-24 19:19:00    阅读次数:202
CodeForces - 468A
Little X used to play a card game called "24 Game", but recently he has found it too easy. So he invented a new game. Initially you have a sequence of ...
分类:其他好文   时间:2018-07-22 16:51:34    阅读次数:170
terminate called after throwing an instance of 'std::out_of_range' what(): basic_string::substr
运行时报错: terminate called after throwing an instance of 'std::out_of_range'what(): basic_string::substrAborted (core dumped) 内存读取越界。 解释1:for example:con ...
分类:Windows程序   时间:2018-07-22 14:05:42    阅读次数:297
CF 1005C Summarize to the Power of Two 【hash/STL-map】
A sequence a1,a2,…,an is called good if, for each element ai, there exists an element aj (i≠j) such that ai+aj is a power of two (that is, 2d for some ...
分类:其他好文   时间:2018-07-21 22:42:19    阅读次数:213
iOS - viewDidLoad, viewWillDisappear, viewWillAppear区别及加载顺序
viewWillAppear: Called when the view is about to made visible. Default does nothing视图即将可见时调用。默认情况下不执行任何操作 viewDidAppear: Called when the view has been ...
分类:移动开发   时间:2018-07-21 14:57:30    阅读次数:159
object.wait为什么要和synchronized一块使用
Object.wait 中JDK提供的doc文档 一个对象的monitor只能被一个线程占用,wait()方法会释放这个对象的锁, 既然要释放 就先要取得这个锁, 取得对象锁的方式只有synchronized()。释放锁之后, 线程进入BLOCK状态 doc文档中说明调用wait的时机是因为运行条件 ...
分类:其他好文   时间:2018-07-21 14:42:52    阅读次数:197
[lua] lua中匹配字符串小数
如何从字符串中正确匹配出小数(带符号)字符串? 使用 string.gmatch 说明见官方文档,摘录如下: string.gmatch (s, pattern) Returns an iterator function that, each time it is called, returns t ...
分类:其他好文   时间:2018-07-21 11:53:32    阅读次数:1071
python functools.wraps
``` python 我们在使用装饰器的时候,有些函数的功能会丢失,比如func.__name__,func.__doc__,func.__module__ 比如下面这个例子: In [16]: def logged(func): ...: def with_logging(*args,**kwar... ...
分类:编程语言   时间:2018-07-20 20:32:34    阅读次数:152
UVa 1572 Self-Assembly (拓扑排序)
题目链接: https://cn.vjudge.net/problem/UVA-1572 Automatic Chemical Manufacturing is experimenting with a process called self-assembly. In this process, m ...
分类:编程语言   时间:2018-07-19 21:23:34    阅读次数:166
ASP.NET MVC中的ActionFilter介绍学习
一直都知道MVC中的ActionFilter,只是没有在实际项目中使用过。 顾名思义,ActionFilter就是指在Action上的Filter, 那么,在Action上的Filter到底有哪些呢。首先我们看看MVC中的Controller基类(抽象类) 我们可以看到,它有5个Filter,分别是 ...
分类:Web程序   时间:2018-07-17 14:23:46    阅读次数:217
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