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List of lists into numpy array
...nacio Vazquez-Abrams will not work. Instead there are at least 3 options:
1) Make an array of arrays:
x=[[1,2],[1,2,3],[1]]
y=numpy.array([numpy.array(xi) for xi in x])
type(y)
>>><type 'numpy.ndarray'>
type(y[0])
>>><type 'numpy.ndarray'>
2) Make an array of lists:...
How to drop columns by name in a data frame
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11 Answers
11
Active
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vs2008编译boost详细步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...不扣的“准”标准库。
Boost库中比较有名的几个库：
（1）Regex，正则表达式库；
（2）Spirit，LL parser framework，用C++代码直接表达EBNF；
（3）Graph，图组件和算法；
（4）Lambda，在调用的地方定义短小匿名的函数对象，很实用...
how to ignore namespaces with XPath
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168
You can use the local-name() XPath function. Instead of selecting a node like
/path/to/x:some...
Get the latest record from mongodb collection
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142
This is a rehash of the previous answer but it's more likely to work on different mongodb vers...
MongoDB副本集详解 优于以往的主从模式 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...为mongodb-linux-x86_64-2.6.0
由三台虚拟机搭建，配置为单核,1G内存。实验环境如下:
MongoDB的副本集不同于以往的主从模式。
在集群Master故障的时候，副本集可以自动投票，选举出新的Master，并引导其余的Slave服务器连接新的Master...
How can I get the intersection, union, and subset of arrays in Ruby?
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155
Utilizing the fact that you can do set operations on arrays by doing &(intersection), -(di...
Cartesian product of multiple arrays in JavaScript
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109
2020 Update: 1-line (!) answer with vanilla JS
Original 2017 Answer: 2-line answer with vanill...
Is SQL or even TSQL Turing Complete?
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edited Nov 11 '13 at 4:45
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