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How to toggle a value in Python
...0
>>> x ^= 1
>>> x
1
The technique generalizes to any pair of integers. The xor-by-one step is replaced with a xor-by-precomputed-constant:
>>> A = 205
>>> B = -117
>>> t = A ^ B # precomputed toggle constant
>>> x = A
>>> x ^...
What's the best way to learn LISP? [closed]
... and C for a couple or years now, and I just finished reading Hackers and Painters, so I would love to give LISP a try!
23 ...
Remove Primary Key in MySQL
...
Without an index, maintaining an autoincrement column becomes too expensive, that's why MySQL requires an autoincrement column to be a leftmost part of an index.
You should remove the autoincrement property before dropping the key:
ALTER TABL...
Statistics: combinations in Python
...ersions of scipy). When exact is False, it uses the gammaln function to obtain good precision without taking much time. In the exact case it returns an arbitrary-precision integer, which might take a long time to compute.
sh...
Way to get all alphabetic chars in an array in PHP?
...st do $array[] = chr($i) to append an element
– Tom Haigh
Jan 10 '09 at 23:21
That's essentially what range does but t...
lua和c/c++互相调用实例分析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...巧精悍的脚本语言，易于嵌入c c++中 ， 广泛应用于游戏AI ，实际上在任何经常变化的逻辑上都可以使用lua实现，配合c c++实现的...lua作为小巧精悍的脚本语言，易于嵌入c/c++中 ， 广泛应用于游戏AI ，实际上在任何经常变化的逻...
迅雷发布无限节点CDN 每GB仅0.1元 - 资讯 - 清泛网 - 专注C/C++及内核技术
...点上。
目前CDN服务最主要的应用场景其实是视频网站、下载，还有页游、网游，这些领域占了整个CDN领域80%以上的需求。还有网站类的，也有一些比较大规模的网站，他的CDN需求也比较高。比如说电商网站在双十一的时候它的C...
When should I use genetic algorithms as opposed to neural networks? [closed]
...e useful for recognizing patterns. They follow a simplistic model of the brain, and by changing a number of weights between them, attempt to predict outputs based on inputs.
They are two fundamentally different entities, but sometimes the problems they are capable of solving overlap.
...
App Inventor 2 天气预报App开发 - 第三方API接入的通用方法 · App Inventor 2 中文网
... 教育 入门必读 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索
App Inventor 2 天气预报App开发 - 第...
强烈推荐一款非常mini的代码高亮开源软件--prism - 开源 & Github - 清泛网...
...高亮显示、WebIDE代码编辑器都在使用它》
第二款prism，下载地址：http://prismjs.com/download.html，它是定制化下载，按照需求下载相应的编程语言支持js，开发版或迷你版。更重要的是代码本身非常小巧，js、css各一个文件，使用时...