Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

mgaitan

from pathlib import Path
import argparse
import jsonlines
import csv


def jsonl2csv(filepath, type_=None, include=None, exclude=None):
    def valid_type(item):
        if type_:
            return item.get('_type') == type_

ByteSizedMarius

Edit: This doesn't work for lists > 20 items, because pagination does not work. Please see here

This script allows extracting name and coordinates for gmaps shared lists. It is incredibly unstable and may break anytime. Good luck figuring out why, because the syntax is extremely confusing and basically makes no sense at all. Thanks to google for not providing an api for this after LITERALLY 12 YEARS

How to use this script:

1. Share a list and open the link in a browser window. It will redirect. The new link will look like this: google.com/maps/@<your coords>/data=....
2. Take the data-portion and paste it into the following link: https://google.com/maps/@/data=?ucbcb=1

cpursley

PostgreSQL is Enough

• Simplify: move code into database functions
• Just Use Postgres for Everything
• PostgreSQL is the worlds’ best database
• Postgres is eating the database world
• Hacker News discussion

Background and Cron Jobs