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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
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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...
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
Mozilla PDF.js:PDF在线预览 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...间还没有长到不能忍受(FAQ里的最后一个问题有提到)
官方上的FAQ
我只选取了我认为可以用得到的问题。
Can Ispecify a different PDF in the default viewer?可以指定一个不同的PDF文件给viewer打开吗?
You canmodify the DEFAULT_URL variable i...
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...
Lua简明教程 - 脚本技术 - 清泛IT论坛,有思想、有深度
...中文翻译(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)
文章转自: 酷 壳 – CoolShell.cn
淘宝大秒系统设计详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。据我所知,目前阿里MySQL团队已将这些patch及提交给MySQL官方评审。
大促热点问题思考
以秒杀这个典型系统为代表的热点问题根据多年经验我总结了些通用原则:隔离、动态分离、分层校验,必须从整个全链路来考虑和优化...
How to delete an app from iTunesConnect / App Store Connect
I submitted a brand new app to AppStore and it got rejected by the Lords ... (nothing new there). What I want to do is delete that app completely from my itunesconnect account. I don't know what apple recently changed but in the past once the app was rejected I use to see a "delete" button on the su...
How to remove an iOS app from the App Store
I want to remove my app, which is currently marked "Ready for sale", from the App Store. I could not find any documentation on this, and there is no "Remove from Sale" option in the "Manage Your Apps" section of iTunes Connect. Can anyone guide me on how I can remove my app from the App Store?
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How to change the name of a Django app?
I have changed the name of an app in Django by renaming its folder, imports and all its references (templates/indexes). But now I get this error when I try to run python manage.py runserver
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How to link to apps on the app store
...utton inside the free version that takes people to the paid version in the app store. If I use a standard link
25 Answers
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