andyhd

# autoswitch virtualenv
function cd() {
  venv="venv"

  if [[ -f .venv ]]; then
    if [[ -d "$HOME/.virtualenvs/$(cat .venv)" ]]; then
      venv="$HOME/.virtualenvs/$(cat .venv)"
    fi
  fi

andyhd

package main

import (
	"fmt"
	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/ec2"
	"github.com/aws/aws-sdk-go/service/sts"
	"log"
	"os"

andyhd

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?

andyhd

import random


def build_lookup(corpus, key_size=2):
    lookup = {}
    for i, _ in enumerate(corpus):
        if i + key_size < len(corpus):
            words = lookup.setdefault(tuple(corpus[i:i + key_size]), [])
            words.append(corpus[i + key_size])
    return lookup

andyhd

Keybase proof

I hereby claim:

• I am andyhd on github.
• I am andyhd (https://keybase.io/andyhd) on keybase.
• I have a public key whose fingerprint is C289 A2BE B069 56A2 0222 BCA1 C142 9457 4A0A F3C6

To claim this, I am signing this object:

andyhd

@contextlib.contextmanager
def google_search_results(terms, page=1, custom_search_id=''):
    params = {
        'q': terms,
        'cx': custom_search_id or app.config.get('GOOGLE_CUSTOM_SEARCH_ID', ''),
        'start': ((page - 1) * 10) + 1,
        'num': 10
    }
    yield custom_search_service.list(**params).execute()

andyhd

from __future__ import with_statement
from alembic import context
from sqlalchemy import engine_from_config, pool
from logging.config import fileConfig

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config

# Interpret the config file for Python logging. 

andyhd

<?php
/**
 * A Maybe Monad class, encapsulates null checking
 */
class Maybe {

  private $value;

  public function __construct($value=null) {
    $this->value = $value;

andyhd

function truncate_html(html, words_left, depth) {
    if (typeof html == 'string') {
        html = html.replace(/</g, ' <').replace(/>/g, '> ').trim().split(/\s+/);
    }
    if (!depth) { depth = 0; }
    var opening_tag = /^<\s*\w+[^>]*>/;
    var closing_tag = /^<\/\s*\w+[^>]*>/;
    var void_tag = /^<\s*(area|base|br|col|command|embed|hr|img|input|keygen|link|meta|param|source|track|wbr)[^>]*>/;
    var word = html[0];
    if (!word) { return []; }

andyhd

    function drawMap(map) {
        var x, y,
            width = map[0].length,
            current_node = map.length * width;
        while (current_node--) {
            x = current_node % width;
            y = ~~(current_node / width);
            drawTile({
                x: x,
                y: y