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function scaleCanvas(canvas, options = {}) {
  const imageData = canvas.toDataURL('image/png');
  const context = canvas.getContext('2d');
  const xScale = options.width !== undefined ? options.width / canvas.width : options.height / canvas.height;
  const yScale = options.height !== undefined ? options.height / canvas.height : options.width / canvas.width;
  const newWidth = Math.round(canvas.width * xScale);
  const newHeight = Math.round(canvas.height * yScale);

  canvas.width = newWidth;
  canvas.newHeight = newHeight;

jjmalina

#! /usr/bin/env python

import sys
from datetime import date

# pip install gitpython
from git import Repo


def get_earliest_commit_since(repo, dt):

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# usage
# ./copy_ga_sessions.sh <app> <ga_view> <day> <gcsbucket> <s3bucket>
app=$1
view=$2
day=$3
gcsbucket=$4
s3bucket=$5
format=NEWLINE_DELIMITED_JSON
tablename="$app:$view.ga_sessions_$day"
bucketname="$gcsbucket"

jjmalina

Installing Debian 8.5 "jessie" on a Lenovo X1 Carbon 4th generation (20FB) - 2016

UPDATE 2018-02-24: I got a new Lenovo X1 Carbon 5th gen and tried to do the same setup with Debian 9.3.0. It was an utter failure because of some boot issues. I went with Xubuntu instead and everything works FLAWLESSLY. Xubuntu is beautiful.

I've had my mind on switching my development machine from a 13" MacBook Pro Retina to a Lenovo X1 Carbon running Linux for a while. The main reason is getting more familiar with Linux itself and also to have a more stable and minimal dev environment. So I finally got the machine and decided to install Debian 8.5 "jessie". Why Debian? Well, I tried installing Arch Linux once and couldn't get past getting wifi to work, and Ubuntu seemed like it added too much stuff. The choice was either Debian or Linux Mint. I went with Debian because it seems like it's the most stable.

Create a bootable USB stick

I followed the instructions at https://www.debian.org/releases/jessie/amd64/ch04s

jjmalina

# -*- coding: utf-8 -*-
"""
    transducers
    ~~~~~~~~~~~

    Lazy evaluation of things over a stream. In this case we do a word count
"""

import types
import operator

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# -*- coding: utf-8 -*-
"""
    orders_source
    ~~~~~~~~~~~~~

    Puts coinbase orders into Concord
"""

import time
import json

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# -*- coding: utf-8 -*-
"""
    coinbase
    ~~~~~~~~

    Real time Coinbase trades and orders using their Websocket Feed
    https://docs.exchange.coinbase.com/?python#overview
"""

import asyncio

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
    datetime_to_epoch
    ~~~~~~~~~~~~~~~~~

    Takes a (naive) UTC datetime and converts to epoch
"""

from calendar import timegm

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def format_timedelta(td):
    """formats a timedelta into the largest unit possible

    >>> from datetime import timedelta
    >>> format_timedelta(timedelta(weeks=2))
    '2w'
    >>> format_timedelta(timedelta(weeks=2, minutes=2))
    '20162m'
    >>> format_timedelta(timedelta(days=2))

jjmalina

# modify the cookbook
knife spork bump <cookbook>
knife cookbook upload <cookbook>
knife spork promote <environment> <cookbook>
knife environment from file <environment>.json