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Which timestamp type should I choose in a PostgreSQL database?
...ute a bit more.
Absolute time is used to record an event. Examples: "User 123 logged in" or "a graduation ceremonies start at 2011-05-28 2pm PST." Regardless of your local time zone, if you could teleport to where the event occurred, you could witness the event happening. Most time data in a databa...
How to make good reproducible pandas examples
... data and results.
import numpy as np
import pandas as pd
np.random.seed(123)
A kitchen sink example
Here's an example showing a variety of things you can do. All kinds of useful sample dataframes could be created from a subset of this:
df = pd.DataFrame({
# some ways to create random d...
“21天教你学会C++” - 创意 - 清泛网 - 专注C/C++及内核技术
...确立了如何发现杰出的软件设计者的三步规划：
尽早系统地识别出最好的设计者群体。
指派一个事业上的导师负责有潜质的对象的发展，小心地帮他保持职业生涯的履历。
让成长中的设计师们有机会互相影响，互相激励。
...
数据挖掘——分词入门 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...就挑选出一个词。目前还没有特别成熟的基于语义的分词系统。
为了让大家快速的了解分词技术，我们采用第一个方式来做测试：基于词典的分词，这种方式简单暴力可以解决百分之七八十的问题。基于词典的分词大概分为以...
What are the differences between Generics in C# and Java… and Templates in C++? [closed]
...e from this situation, consider the following code:
Y<int>::my_type(123);
This code statement is perfectly valid and tells C++ to execute the function call to Y<int>::my_type. However, if my_type is not a function but rather a type, this statement would still be valid and perform a sp...
Running Bash commands in Python
...r((i=1;i<=$#;i++)); do
# Arrays are Bash-only
array[i]+=123
done''',
shell=True, check=True,
executable='/bin/bash')
A subprocess is separate from its parent, and cannot change it
A somewhat common mistake is doing something like
subprocess.run('foo=bar', shell=Tru...
Pretty-print C++ STL containers
...sert("hello");
j.insert("world");
double k[] = { 1.1, 2.2, M_PI, -1.0/123.0 };
std::cout << i << "\n" << j << "\n" << k << "\n";
}
It currently only works with vector and set, but can be made to work with most containers, just by expanding on the IsConta...
Sublime Text 3能用支持的插件推荐 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...t+P，输Package control就可以选择插件的安装、管理、删除等操作，因为sublime text 3的插件需要基于pyhone 3编写，所以用sublime text 2的安装方法不管用，可以看看我之前写的一篇文章，Sublime text 3如何安装package control办法。
此外，安...
RESTful Authentication
...c.html HTTP/1.1
Host: www.example.org
Cookie: theme=light; sessionToken=abc123
The cookie technique itself is HTTP-linked, so it's not truly RESTful, which should be protocol-independent, IMHO. It is vulnerable to MiM or Replay attacks.
Granted via Token (OAuth2)
An alternative is to put a token...