amodm

Weekend Dev Puzzle

Some time between 2021-22, I ran a list of puzzles designed to push developers into developing a better understanding of the technologies they use on a day to day basis. Each puzzle is designed to be fun, provocative, and short.

This is a complete list of those puzzles. Each link takes you to the tweet where I first posed the problem. If you like any of them, please feel free to share with others.

Edit (2024-01-27): Adding other puzzles to this 2024 onwards. Criteria:

1. Problem statement should be understandable by most in s/w tech, even if the ability to figure it out may not be.
2. Thinking about the problem should lead to clearer understanding of some foundational concept.
3. Should be short.
4. Should be fun to ponder over.

miguelgrinberg

" plugins
let need_to_install_plugins = 0
if empty(glob('~/.vim/autoload/plug.vim'))
    silent !curl -fLo ~/.vim/autoload/plug.vim --create-dirs
        \ https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
    let need_to_install_plugins = 1
endif

call plug#begin()
Plug 'tpope/vim-sensible'

imkaka

import os
import re
import sys
from subprocess import Popen, PIPE


ROOT_FILES_PATH = '/home/<username>/path/to/your/file'

# REgex
STATIC_REGEX = re.compile(r'mobile/(.*?)(\.css|\.js|\.svg|\.less|\.png|\.jpg|\.woff|\.ttf|\.eot|\.txt|\.scss)')

dmmeteo

"""
Single Responsibility Principle
“…You had one job” — Loki to Skurge in Thor: Ragnarok
A class should have only one job. 
If a class has more than one responsibility, it becomes coupled. 
A change to one responsibility results to modification of the other responsibility.
"""

class Animal:
    def __init__(self, name: str):

bradtraversy

SSH Cheat Sheet

This sheet goes along with this SSH YouTube tutorial

Login via SSH with password (LOCAL SERVER)

$ ssh brad@192.168.1.29

Create folder, file, install Apache (Just messing around)

$ mkdir test

$ cd test

MihaZupan

// using System;
// using System.Text;
// using System.Security.Cryptography;

static bool CheckAuthorization(Dictionary<string, string> fields, string token, string hash)
        {
            int allowedTimeOffset = 30; // Or whatever you choose
            if (!fields.ContainsKey("auth_date")) return false;
            if (long.TryParse(fields["auth_date"], out long timestamp))
            {

tomysmile

type below:

brew update
brew install redis

To have launchd start redis now and restart at login:

brew services start redis

sloria

The Best of the Best Practices (BOBP) Guide for Python

A "Best of the Best Practices" (BOBP) guide to developing in Python.

In General

Values

• "Build tools for others that you want to be built for you." - Kenneth Reitz
• "Simplicity is alway better than functionality." - Pieter Hintjens

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs