ymmn

import subprocess
import time
import select
import sys


def stream_procs(procs, poll_interval_ms=100, timeout_ms=None):
    """
    yields output for all processes until they're all finished

ymmn

import subprocess
import time
from queue import Queue, Empty
from threading import Thread
import sys


def _enqueue_output(out, queue):
    for line in iter(out.readline, b''):
        queue.put(line)

ymmn

/**
 * Implementing promises from scratch. Turns out simple
 *
 * There are only two possibilities:
 * 1. then() gets called before the async function finishes
 * 2. then() gets called after the async function finishes
 *
 * as long as we handle both, we're good!
 */

ymmn

# encrypt
openssl enc -aes-256-cbc -in un_encrypted.data -out encrypted.data

# decrypt
openssl enc -d -aes-256-cbc -in encrypted.data -out un_encrypted.data

ymmn

from multiprocessing import Process, Queue
import time
import os


def worker(q, output_q):
    while True:
        print 'im the worker', os.getpid()
        print 'got ', q.get()
        output_q.put(55)

ymmn

Iteration speed

• Use “Instant Run” whenever possible: https://developer.android.com/studio/run/index.html#instant-run
• Genymotion is a fast emulator: https://www.genymotion.com/

Static Analysis

https://developer.android.com/studio/write/annotations.html

• Nullness
• VisibleForTesting

Testing

ymmn

Internet vs Web

Main things about the web: hypertext and URLs

Core Web Technologies

• Hypertext Markup Language (HTML)
• Hypertext Transfer Protocol (HTTP)
• Web browsers

This is everything we had back in 1994.