JoshuaGross

# Copyright (c) 2016, Swift Navigation, All Rights Reserved.
# Released under MIT License.
#
# Find documentation of parameters here:
# http://aprs.gids.nl/nmea/#gga
#
# time_t is a `time_struct` (https://docs.python.org/2/library/time.html)
# alt_m, geoidal_sep_m are in meters
import time
from math import floor

JoshuaGross

Freeing up extra disk space inside a Docker container

Sometimes while running a command inside of a docker container, the container itself will run out of disk space and things can fail (sometimes in strange ways). This is not a guide on how to allocate resources, but a quick cookbook on how to free up disk space inside a container. See below for links to more resources and reading.

If at all possible, just run Docker with increased disk space

See Limit disk size and bandwidth of a Docker container.

Resize an aufs volume

JoshuaGross

use text_io::try_read;
use std::io;
use std::io::prelude::*;
use std::cmp::Ordering;
use std::fmt;

pub enum BST<T: Ord+fmt::Display> {
    Leaf {
        value: T,
        left_child: Box<BST<T>>,

JoshuaGross

-- can be used in ghci
import qualified Data.ByteString as B
import Numeric (showHex)
import qualified Data.ByteString.Lazy as LBS
import qualified Data.Binary               as B

-- encode some object to a binary ByteString
let s = (B.encode someObjectThatHasBinaryInstance)

let prettyPrint = P.concatMap ((\x -> "0x"++x++" ") . flip showHex "") . B.unpack :: B.ByteString -> String

JoshuaGross

$ clang++ main.cpp -std=c++11 -o main && ./main
Converting red to string: red
Converting 2 to enum to string: yellow
Converting 20 to enum to string: undefined
Converting 20 to enum to int: 20

JoshuaGross

A list of interesting URLs

... and a short description of interesting things learned within:

• 2015-12-25: Beautiful Decay of AOL: someone going over old AOL CDs and "reviewing" the contents of AOL pages.
• 2015-12-25: Specialising Dynamic Techniques for Implementing The Ruby Programming Language: Chris Seaton's PhD thesis - embracing metaprogramming in Ruby to optimize Ruby VMs.
• 2015-12-25: People around the world are eating banana peels because they know something that Westerners do not: basically eating banana peels is better for you and the environment.
• 2015-12-26: Amateur Hour: a guide to how training for beating amateur cycling records works. tl;dr: excruciating, requires intense focus. Train things at 90% of maximum for shorter intervals.
• 2015-12-26: [Attritional Interfaces](https://samgentle.com

JoshuaGross

   CREATE OR REPLACE FUNCTION DateDiff (units VARCHAR(30), start_t TIMESTAMP, end_t TIMESTAMP) 
     RETURNS INT AS $$
   DECLARE
     diff_interval INTERVAL; 
     diff INT = 0;
     years_diff INT = 0;
   BEGIN
     IF units IN ('yy', 'yyyy', 'year', 'mm', 'm', 'month') THEN
       years_diff = DATE_PART('year', end_t) - DATE_PART('year', start_t);
 

JoshuaGross

function transposeMatrix (m) {
  return m.map((_, c) => m.map(r => r[c]));
}

console.log(transpose([[1,2,3],[4,5,6],[7,8,9]]));

JoshuaGross

#!/usr/bin/env node

const mode = process.argv[2];
const startDate = process.argv[3];
const endDate = process.argv[4];
const vacationDays = parseInt(process.argv[5], 10);
const sugar = require('sugar-date');
const moment = require('moment');

const parsedStartDate = moment(sugar.Date.create(startDate));

JoshuaGross

select * from pg_stat_activity;