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Code Golf: Lasers

...ne marker (ASCII 10), set the width if it hasn't already been set. The skipped G[0] allows us to write w=p-G instead of w=p-G+1. Also, this finishes off the ?: chain from the M's. for(; q+=m, Move the light by the movement vector. m= *q&4 ?(*q&1?...
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搭建高可用mongodb集群(四)—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...p /data/mongodbtest #进入mongodb文件夹 cd /data/mongodbtest 3、下载mongodb的安装程序包 wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.8.tgz #解压下载的压缩包 tar xvzf mongodb-linux-x86_64-2.4.8.tgz 4、分别在每台机器建立mongos 、config ...
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NASM x86汇编入门指南 - C/C++ - 清泛网 - 专注C/C++及内核技术

...一篇关于AT&T的汇编入门文章) 3.2 如何安装NASM? 下载地址:http://www.nasm.us/ 可以下载源码包或者rpm包,rpm –iUh *.rpm 四、Linux汇编介绍 4.1 DOS和Linux汇编主要不同的地方 DOS汇编中,大部分工作依靠21号中断(int ...
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二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... 基础知识 首先,我们先说一下二维码一共有40个尺寸。官方叫版本Version。Version 1是21 x 21的矩阵,Version 2是 25 x 25的矩阵,Version 3是29的尺寸,每增加一个version,就会增加4的尺寸,公式是:(V-1)*4 + 21(V是版本号) 最高Version 40...
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Printing 1 to 1000 without loop or conditionals

... @PP, that's quite lengthy to explain, but basically, j is initially 1 because it's actually argc, which is 1 if the program is called without arguments. Then, j/1000 is 0 until j becomes 1000, after which it's 1. (exit - main)...
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Lua简明教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...文翻译(云风翻译版本) 关于Lua的标库,你可以看看官方文档:string, table, math, io, os。 (全文完) Lua 简明教程
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CGRidCtrl控件 学习心得 - C/C++ - 清泛网 - 专注C/C++及内核技术

...,自定义一个类似CGridCellCheck的单元格类。 本文源码下载:GridCtrl.rar 源doc文档下载:MFCGridCtrl控件_使用心得.doc MFC Grid control相关介绍及完整Demo下载:MFC Grid control 2.27 MFC Grid CGRidCtrl
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Algorithm to compare two images

...better than random guessing, otherwise it is useless to us! You can then apply your software into the real world in a controlled way and start to analyse the results it produces. This is the sort of software project which can go on for infinitum, there are always tweaks and improvements you can ma...
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快速理解 高频对冲套利自动交易(程式化交易) - 更多技术 - 清泛网 - 专注...

...所支持套利指令,上海的2家暂时都不支持,不过中金所官方网站上,在今年2月份,倒是对套利交易予以政策支持(交易所层面上的手续费及保证金比例优惠),据说,在4月底的期货分析师大会上,中金所负责人对外界宣称,即...
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Secure hash and salt for PHP passwords

...he raw output of hash(), either use hex output or base64_encode it. (This applies to any input that may have a rogue \0 in it, which can seriously weaken security.) Dos Use scrypt when you can; bcrypt if you cannot. Use PBKDF2 if you cannot use either bcrypt or scrypt, with SHA2 hashes. Reset ev...