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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...
社交应用组件 · App Inventor 2 中文网
...选择框.电话号码 属性。
要直接指定电话号码（例如 021-12345678），请将 电话号码 属性设置为具有指定数字的文本（例如“02112345678”）。
属性
电话号码
指定要拨打的电话号码。
事件
来电已接听时(电话号码)
指示...
What is an existential type?
...ing> mc1 = new MyClass("foo");
MyClass<Integer> mc2 = new MyClass(123);
MyClass<?> mc3 = MyClass.secretMessage();
From the perspective of a client of MyClass, T is universal because you can substitute any type for T when you use that class and you must know the actual type of T whe...
How to “perfectly” override a dict?
...e accepted answer remove the redundant dict?
– Seanny123
Mar 8 '17 at 5:23
1
Two ways that immedi...
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...
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...
What optimizations can GHC be expected to perform reliably?
...hich libraries you choose to use).
For example, if you work with Haskell '98 arrays, don't expect any fusion of any kind. But I understand that the vector library has extensive fusion capabilities. It's all about the libraries; the compiler just provides the RULES pragma. (Which is extremely powerf...
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...
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...