edthrn

(ns util.redis
  (:refer-clojure :exclude [memoize])
  (:require [taoensso.carmine :as car]))

;; boilerplate stuff that is not in Carmine

(def ^:dynamic ^:private *pool*)
(def ^:dynamic ^:private *spec*)

(defmacro with-redis

edthrn

# Taken from https://docs.github.com/en/github/authenticating-to-github/removing-sensitive-data-from-a-repository

# Warning:
# --------
# All stashes may be lost!

PATH_TO_REMOVE=big-folder/commited/by/error

# 1. Force Git to process, but not check out, the entire history of every branch and tag
# 2. Remove the specified file, as well as any empty commits generated as a result

edthrn

# Usage: ./pw.sh Github.com

op get item $1 | jq -r '.details.fields[] | select(.designation=="password").value' | xclip -selection c

edthrn

# Inspired by https://blog.codinghorror.com/sorting-for-humans-natural-sort-order/
# Adding a `key` argument so we can expect the same behaviour as the builtin `sorted`
import re


def humansorted(seq, key=None):
    """Return the sequence in the order that a human being expects.
    
    If `key` is provided, as per the built-in `sorted` function, it must be a
    callable that accepts a single argument.

edthrn

# Following https://stackoverflow.com/questions/34028219/how-to-execute-commands-on-aws-instance-using-boto3
import boto3

ssm = boto3.client('ssm')

response = ssm.send_command(
    InstanceIds=['i-abcde12345...'],
    DocumentName='AWS-RunShellScript',
    Parameters={'commands': ['echo "This command ran on $(date)"']
)

edthrn

Say we have a database A hosted at my.first.database.com loaded with data, and we want to replicate this data over database B, located at my.second.database.com. We suppose database A and B have identical schemas, and both databases are accessible via port 5432.

Dump content from database A

 pg_dump --data-only \
 -h my.first.database.com \
 -U {database_user} \
 -f /tmp/dump.sql \
 -T={table pattern to exclude [optional]} \

edthrn

"""
https://aws.amazon.com/blogs/aws/manage-instances-at-scale-without-ssh-access-using-ec2-run-command/
https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ssm.html
https://stackoverflow.com/questions/34028219/how-to-execute-commands-on-aws-instance-using-boto3
"""
import boto3

# Need AWS credentials in ~/.aws...
ssm = boto3.client('ssm')

edthrn

Guidelines

Implement a Vector class. It should take an undefenite amount of parameters and behave like this:

>>> v1 = Vector(5, 9, -8, 2, 13, -23, 0, 0, 12)
>>> v2 = Vector(6, 8)
>>> v3 = Vector(-1, 1, 1, -1)
>>> v4 = Vector(0, 0, 0)

edthrn

#!/bin/bash

# MIT License
# Copyright (c) 2019 nibble.ai
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is

edthrn

#!/bin/sh

# From https://askubuntu.com/a/626301
gs \
-sDEVICE=pdfwrite \
-dCompatibilityLever=1.4 \
-dPDFSETTINGS=/default \
-dNOPAUSE \
-dQUIET \
-dBATCH \