xmake在xmake.lua中提供了 $(varname) 的语法，来支持内置变量的获取，例如：
lua
add_cxflags("-I$(buildir)")
它将会在在实际编译的时候，将内置的 buildir 变量转换为实际的构建输出目录：-I./build
并且这些变量在自定义脚本中，也是可以支持的，例如：
lua
target("test")
after_build(target)
print("build ok for $(plat)!")
end
这将会在编译完后，输出：
lua
build ok for macosx!
这些内置变量，大部分都是通过配置的时候，缓存的继续阅读 »
Lucene英文目录结构和功能模块
- core: Lucene core library
- analyzers
analyzers-common: Analyzers for indexing content in different languages and domains.
analyzers-icu: Analysis integration with ICU (International Components for Unicode).
analyzers-kuromoji: Japanese Morphological Analyzer
analyzers-morfologik: Anal继续阅读 »
rlist 0.3 is released! This package now provides a wide range of functions for dealing with list objects. It can be especially useful when they are used to store non-tabular data.继续阅读 »
Gitbook is rather a relatively new concept on the web. It provides a user-friendly framework for authors to write and produce online books with beautiful illustrations and responsive interactions. It allows authors to write in Markdown syntax, which is very easy to learn and use, so that they can focus more on the cont继续阅读 »
R rocks in both academia and industry nowadays. A rapidly increasing number of researchers choose R to be one of their productive tools for data analysis and data visualization. It is partially because the software is totally free and open-source but also because the community behind the stage who contributes to nearly继续阅读 »
Question
Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight).
For example, the 32-bit integer ’11' has binary representation 00000000000000000000000000001011, so the function should return 3.
解说
这道题的意思是统计32位整数二进制格式下的‘1’的个数。
more
Solution
rig继续阅读 »