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Rename specific column(s) in pandas
...ditional expressions like:
df.columns = ['log(gdp)' if x=='gdp' else 'cap_mod' if x=='cap' else x for x in df.columns]
Or, construct a mapping using a dictionary and perform the list-comprehension with it's get operation by setting default value as the old name:
col_dict = {'gdp': 'log(gdp)', 'c...
Where to put view-specific javascript files in an ASP.NET MVC application?
... how I did it:
In the web.config folder in the root of /Views you need to modify two sections to enable the webserver to serve the files:
<system.web>
<httpHandlers>
<add path="*.js" verb="GET,HEAD" type="System.Web.StaticFileHandler" />
<ad...
Android Game Keeps Getting Hacked [closed]
...oof, but might remove some of the interest for hacking the game.
Freemium model
1) Make the first 5-10 levels free so people can learn the game and have some fun without paying. Less will want to hack the first level and the game will spread even further by Freemium model.
Shareware/clustered lev...
Is unsigned integer subtraction defined behavior?
... cannot be represented by the resulting unsigned integer type is
reduced modulo the number that is one greater than the largest value that can be
represented by the resulting type.
(ISO/IEC 9899:1999 (E) §6.2.5/9)
As you can see, (unsigned)0 - (unsigned)1 equals -1 modulo UINT_MAX+1, or ...
Can I combine :nth-child() or :nth-of-type() with an arbitrary selector?
... ' myClass ')]//tr[contains(concat(' ', @class, ' '), ' row ')][position() mod 2)=1]
Other solutions using different technologies are left as an exercise to the reader; this is just a brief, contrived example for illustration.
For what it's worth, there is a proposal for an extension to the :nth-c...
一致性hash和solr千万级数据分布式搜索引擎中的应用 - 大数据 & AI - 清泛...
...数据都是统一的自增id数据，从1~600，分成3堆可以采用 id mod 3的方式。其实在真实环境可能不是这种id是字符串。需要把字符串转变为hashcode再进行取模。
从图中可以看出 1号机器的3、5、9迁移出去了、2好机器的4、6迁移出去了...
Custom HTTP headers : naming conventions
... of today, 20141102 in this slight edit to my answer -- currently using "X-Mod-Pagespeed" to indicate the version of their Apache module involved in transforming a given response. Is anyone really suggesting that Google should use "Mod-Pagespeed", without the "X-", and/or ask the IETF to bless its u...
How can I add reflection to a C++ application?
...our code with macro's/templates or some other source approach (looks ugly)
Modify a compiler such as clang/gcc to produce a database.
Use Qt moc approach
Boost Reflect
Precise and Flat Reflection
The first link looks the most promising (uses mod's to clang), the second discusses a number of techniq...
PHP中9大缓存技术总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ttpd.conf里进行设置，当然前提是在安装apache的时候要激活mod_cache的模块。
安装apache时：./configure –enable-cache –enable-disk-cache –enable-mem-cache
8、php APC缓存扩展
Php有一个APC缓存扩展，windows下面为php_apc.dll，需要先加载...
Modbus硬件控制01——什么是Modbus - 创客硬件开发 - 清泛IT社区，为创新赋能！
本帖最后由 mzb2012 于 2025-06-19 12:37 编辑
Modbus算是嵌入式领域比较经典一种通信协议，不管你是初学者，还是工作多年的工程师，都很有必要了解一下。1.什么是Modbus?1.什么是Modebus它是一个Bus，即总线协议。比如串口协议、IIC...