albert-yu

import time
import os


def log_with_time(msg: str):
    print("Time: {} - {}".format(time.strftime("%H:%M:%S"), msg))


def main():
    iters = 0

albert-yu

Getting certs for HTTPS

1. Run yarn build or npm run build on your local machine. scp it over to the EC2 box (you can compress it into a build.zip file and then unzip once it's copied).
2. Install docker and docker-compose on the EC2 box following these instructions.
3. Create sym link for docker-compose: sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
4. Install git on the EC2 if you haven't already. Then clone this repo onto the box. cd into the repo.
5. Following the README from the above repo, update all necessary configurations (email address, server names).
6. Run sudo "PATH=$PATH" sh init-letsencrypt.sh.
7. The generated certs should be at ./data/certbox/live/sub.mysite.com/fullchain.pem and ./data/certbox/live/sub.mysite.com/privkey.pem. Look at the volumes section in the docker-compose.yml in case the configuration is different.
8. Now, you

albert-yu

Getting certbot to work

Download the RPM

curl -O http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

Then install it

albert-yu

# this script was used to convert instrumentation data from IMSLP
# to a collection of objects, decoupling instrument count and misc.
# notes from the long string blob

import os
import json
import re

files = os.listdir(".")
jsons = filter(lambda x: x.endswith(".json"), files)

albert-yu

def _solver_try(y, face_val, num_periods, coupon_payment):
    result = 0
    for t in range(1, num_periods + 1):
        result += coupon_payment / (1 + y) ** t
        if t == num_periods:
            result += face_val / (1 + y) ** t

    return result

albert-yu

:set background=dark
:set t_Co=256
" :set number
:set relativenumber
:set rnu

" default tab settings
:set expandtab
:set shiftwidth=4
:set tabstop=4

albert-yu

SSL, Certbot, and Ring

To run our Ring app in production with a valid signed certificate, we need to do a few things.

1. Generate the signed certificate/chain and private key by following steps 1-3 on Certbot here. The two files generated will be at

/etc/letsencrypt/live/mydomain.com/fullchain.pem
/etc/letsencrypt/live/mydomain.com/privkey.pem

albert-yu

import { compress, decompress } from './compress'

test('basic-compress', () => {
	const input = [100, 0, 0, 0, 43, 4, 43, 43]
	expect(compress(input)).toBe('100,0:3,43,4,43:2')
})

test('long-compress', () => {
	const longInput = [
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

albert-yu

// Exercise page can be found at
// https://tour.golang.org/concurrency/8
package main

import (
	"fmt"
	"golang.org/x/tour/tree"
)

/*

albert-yu

;;-----------------------------------------------------------------
;; SEQUENCES
;; https://aphyr.com/posts/304-clojure-from-the-ground-up-sequences
;;-----------------------------------------------------------------

;; [] vector
;; #{} hashset?


; Problems