qiao hai-jun qiaohaijun

这个很平常的代码其实本身还是有些技术含量的

凸优化以及非线性机器学习算法的胜利

非线性不可求解

这个宇宙是非线性的宇宙，我们人类在其中也不过是一个非线性的存在
时间局部性，空间局部性可以用线性来拟合。

世界本身是复杂的

混沌是正常的
蝴蝶效应是一个例子

语言律师

把c++标准倒背如流
人肉编译器

本末倒置

本是创造价值
末是成为人肉编译器
完成需求，实现价值才是

熟练掌握c++和完成需求之间的关系

angel是tencent开源的ps架构系统

好的架构师演化还是设计出来的？
为什么这个问题如此复杂

简单举个例子（可能也不是很形象）select/poll饭店服务员（内核）告诉饭店老板（用户程序）：”现在有客人结账“但是这个服务员没人明确告诉老板，哪几桌的客人结帐。老板得自儿一个一个桌子去问：请问是你要结帐？epoll饭店服务员（内核）告诉饭店老板（用户程序）：”1,2,5号客人结账“老板就可以直接去1,2,5号桌收钱了

作者：方杨链接：https://www.zhihu.com/question/21233763/answer/23837166 来源：知乎著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

	#

	%global srcvers 3.0.0-beta-1
	%global srcname protobuf-%{srcvers}
	%global _prefix /opt/%{srcname}

	#

	Summary: Protocol Buffers Google''s data interchange format
	Name: protobuf3

	warning: core file may not match specified executable file.
	[New LWP 15712]
	[New LWP 15799]
	[New LWP 15713]
	[New LWP 15801]
	[New LWP 15802]
	[New LWP 15711]
	[New LWP 15800]
	[New LWP 15691]
	[Thread debugging using libthread_db enabled]

	(gdb) bt
	#0 0x00007fcec8f181d7 in raise () from /lib64/libc.so.6
	#1 0x00007fcec8f198c8 in abort () from /lib64/libc.so.6
	#2 0x00007fcec981c9d5 in __gnu_cxx::__verbose_terminate_handler() () from /lib64/libstdc++.so.6
	#3 0x00007fcec981a946 in ?? () from /lib64/libstdc++.so.6
	#4 0x00007fcec981a973 in std::terminate() () from /lib64/libstdc++.so.6
	#5 0x00007fcec981ab93 in __cxa_throw () from /lib64/libstdc++.so.6
	#6 0x00007fcec986fa17 in std::__throw_out_of_range(char const*) () from /lib64/libstdc++.so.6
	#7 0x0000000000412fd9 in std::vector<int, std::allocator<int> >::_M_range_check (this=0x14e7940, __n=1) at /usr/include/c++/4.8.2/bits/stl_vector.h:794
	#8 0x0000000000412c57 in std::vector<int, std::allocator<int> >::at (this=0x14e7940, __n=1) at /usr/include/c++/4.8.2/bits/stl_vector.h:830

	/* Copyright (C) 1997,1998,1999,2000,2001,2006 Free Software Foundation, Inc.
	This file is part of the GNU C Library.

	The GNU C Library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 of the License, or (at your option) any later version.

	The GNU C Library is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of