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@davidmerrick
davidmerrick / .py
Created October 16, 2016 23:15
GET LAST MONDAY’S DATE IN PYTHON
#!/usr/bin/python
from datetime import date
from dateutil.relativedelta import relativedelta, MO
today = date.today()
last_monday = today + relativedelta(weekday=MO(-1))
print last_monday.strftime("%-m-%d")
# In the above example, the “%-m” in the date format string removes zero-padding from single-digit months.
@glenjamin
glenjamin / records.js
Last active May 4, 2020 16:50
Flow types for immutable records.
/* @flow */
import * as I from "immutable";
/**
* Define an immutable record intended for holding reducer state
* @param spec - the keys and their default values
* @return a state record factory function
*/
export function defineRecord<T: Object>(
@non
non / answer.md
Last active December 16, 2025 11:43
answer @nuttycom

What is the appeal of dynamically-typed languages?

Kris Nuttycombe asks:

I genuinely wish I understood the appeal of unityped languages better. Can someone who really knows both well-typed and unityped explain?

I think the terms well-typed and unityped are a bit of question-begging here (you might as well say good-typed versus bad-typed), so instead I will say statically-typed and dynamically-typed.

I'm going to approach this article using Scala to stand-in for static typing and Python for dynamic typing. I feel like I am credibly proficient both languages: I don't currently write a lot of Python, but I still have affection for the language, and have probably written hundreds of thousands of lines of Python code over the years.

@rochacbruno
rochacbruno / mainpython.md
Last active December 20, 2025 22:09
Use of __main__.py

The use of __main__.py to create executables

myprojectfolder/
    |_ __main__.py
    |_ __init__.py

Being __main__.py:

print("Hello")

@evancz
evancz / union-types.md
Last active March 12, 2018 13:14
Imagine conversations and questions for a time when people say "union type" instead of "algebraic data type". Think about how the responses might work if you said "ADT" instead.

Union Types

If Elm community is going to begin referring to "union types" instead of "algebraic data types" we should think about how that will work in practice. What discussions will we have? Will we find ourselves in awkward spots trying to explain things?

The following question/answer pairs simulate things I'd expect to see in a world of "union types". The pairs are grouped by what background I expect the questions to come from so we know the subtext. I have also added some meta comments in italic to explain my phrasing.

One thing to consider is that a lot of learners will not have a person to ask, so the path to arriving at these answers needs to be easy if you are just searching online.

General Questions