stl::map是个很危险的容器,因为当用[]访问map元素时不是只读,还伴随着写操作:当访问的key值不存在时会自动插入。以下引自:http://www.cplusplus.com/reference/map/map/operator[]/Ifkmatches the key of an elem...
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其他好文 时间:
2014-11-21 12:32:47
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139
Let $A$ be a nilpotent operator. Show how to obtain, from aJordan basis for $A$, aJordan basis of $\wedge^2A$.
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其他好文 时间:
2014-11-21 10:37:06
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160
ProblemIn 1-9 keypad one key is not working. If someone enters a password then not working key will not be entered. You have given expected password a...
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其他好文 时间:
2014-11-21 06:58:11
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197
Divide two integers without using multiplication, division and mod operator.代码:class Solution {private: int res;public: int solve(long long divi...
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其他好文 时间:
2014-11-20 11:45:17
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146
1、static_cast Operator The expression static_cast ( expression ) converts expression to the type of type-id based solely on the types present in the ....
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编程语言 时间:
2014-11-19 22:11:04
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245
安装php的时候提示libxml2 未安装 从服务器安装libxml2 提示libxml.c:3821: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'libxmlMethods'libxml.c:3876: war....
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系统相关 时间:
2014-11-19 12:23:22
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526
发掘图像边界 —— 一阶导数顶点不好求,可用二阶导数过零点来代替 Getting the first derivative of the intensity, we observed that an edge is characterized by a maximum, as it can be s...
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其他好文 时间:
2014-11-18 23:55:21
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286
(1). The singular value decomposition leads tot eh polar decomposition: Every operator $A$ can be written as $A=UP$, where $U$ is unitary and $P$ is p...
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其他好文 时间:
2014-11-18 13:20:04
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211
错误代码:objc_msgSend(self.beginRefreshingTaget, self.beginRefreshingAction, self);Too many arguments to function call, expected 0, have 3经过几番周折,终于叨叨解决方案了...
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移动开发 时间:
2014-11-18 11:42:09
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317
《Effective C++ 》学习笔记——条款11:在 operator= 中处理“自我赋值”...
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编程语言 时间:
2014-11-18 10:18:59
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237