十月 19, 2014
npm全称Node Package Manager，是node.js的模块依赖管理工具。由于npm的源在国外，所以国内用户使用起来各种不方便。下面整理出了一部分国内优秀的npm镜像资源，国内用户可以选择使用。
hongyangqin
hongyangqin
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Created
December 7, 2017 10:08
From: https://github.com/nodejs/node-gyp#on-windows
在使用npm进行安装的时候,提示缺少python等问题,直接通过以下方法安装即可
Install all the required tools and configurations using Microsoft's windows-build-tools using npm install --global --production windows-build-tools from an elevated PowerShell or CMD.exe (run as Administrator).
Install tools and configuration manually:
-
Visual C++ Build Environment:
- Option 1: Install Visual C++ Build Tools using the Default Install option.
-
Option 2: Install Visual Studio 2015 (or modify an existing installation) and select Common Tools for Visual C++ during setup. This also works with the free Community and Express for Desktop editions.
hongyangqin
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Last active
December 7, 2017 10:22
From : http://www.freebuf.com/sectool/92397.html
hongyangqin
/ 1.html.md
Created
December 7, 2017 14:43
From http://blog.csdn.net/u011240016/article/details/53241440
hongyangqin
/ 1.html.md
Created
December 7, 2017 15:31
From : http://blog.csdn.net/frankchen0130/article/details/50801852#1soft-margin-svm-as-regularized-model
From : http://blog.csdn.net/tonywearme/article/details/7097910
前不久在写代码的时候遇到一个link错误，代码的原型如下所示，基本就是定义了一个基类和派生类，在派生类的一个成员函数中用到了基类定义的一个内联函数。
// base.h
class Base
{
protected:
问题 :出现无法解析的外部符号
如图:
全局变量一般在.cpp文件中定义，在头文件中定义extern 头文件中应使用extern 关键字声明全局变量（不定义）
多文件中共享变量
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| #include<stdio.h> | |
| #include<stdlib.h> | |
| #include<math.h> | |
| #include<time.h> | |
| #define maxgen 200 // 最大进化代数 | |
| #define sizepop 20 // 种群数目 | |
| #define pcross 0.6 // 交叉概率 | |
| #define pmutation 0.1 // 变异概率 | |
| #define lenchrom 14 // 染色体长度(这里即为城市个数) | |
| double city_pos[lenchrom][2] = { { 16.47,96.10 },{ 16.47,94.44 },{ 20.09,92.54 },{ 22.39,93.37 },{ 25.23,97.24 },{ 22.00,96.05 },{ 20.47,97.02 }, |
hongyangqin
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Created
December 14, 2017 04:35
图像与滤波 阮一峰 2017年12月13日 From:http://www.ruanyifeng.com/blog/2017/12/image-and-wave-filters.html