ewalstad’s gists

ewalstad / gist:11119429

Created April 20, 2014 17:11

Mege GPX tracks

gpsbabel -t -i gpx -f a.gpx -i gpx -f b.gpx -x track,merge -o gpx -F combined.gpx

ewalstad / csv_utils.py

Last active January 2, 2016 15:48

Utilities to help with using CSV IO. See also: http://docs.python.org/2/library/csv.html#csv-examples

	#-- coding:utf-8 --
	"""
	====================================
	Utilities to help with using CSV IO
	====================================


	Example usage
	-------------

ewalstad / authorized_keys

Created December 26, 2013 17:27

Public keys: https://github.com/ewalstad.keys

See: https://github.com/ewalstad.keys

ewalstad / top_disk_pigs.sh

Created December 26, 2013 16:54

List the 10 directories or files that are consuming the most disk space. Requires one argument, the top directory to search.

	function ds(){
	# A script to list the 10 directories or files that are consuming the most
	# disk space.
	# Requires one argument, the top directory to search
	du -hs $(du --max-depth=1 $1 \
	\| sort -nr \
	\| mawk -W interactive '{printf("%s\n", $2)}' \
	\| head -n 10 \
	\| tail -n 10)
	}

ewalstad / find_python_source.sh

Created December 26, 2013 16:52

Change to the directory containing the Python module passed as the first argument. Thanks Chris Lamb: http://chris-lamb.co.uk/2010/04/22/locating-source-any-python-module/

	function cdp(){
	# Change to the directory containing the Python module passed as the first
	# argument.
	# http://chris-lamb.co.uk/2010/04/22/locating-source-any-python-module/
	cd "$(python -c "import os.path as _, ${1}; \
	print _.dirname(_.realpath(${1}.__file__[:-1]))"
	)"
	}

ewalstad / virtualenvwrapper_python.sh

Last active January 1, 2016 11:09

bash_aliases snippet for choosing the correct Python version for, andsourcing of, virtualenvwrapper.

	# Tell virtualenvwrapper to use the python that was used to install
	# virtualenv. It's the full path after the shebang (#!)
	# This should keep us from seeing virtualenvwrapper errors re: "hooks"
	VIRTUALENVWRAPPER_PYTHON=`head -1 $(which virtualenv) \| cut -d ! -f 2`

	source $(which virtualenvwrapper.sh)

ewalstad / currency_plus.sql

Last active December 31, 2015 21:48

	-- currency_plus(val NUMERIC, decimals INT DEFAULT 2)
	-- Returns a US Dollar formatted string.
	-- Takes one required argument, the value to be formatted
	-- and one optional argument, decimals, the number of decimal places to
	-- display (default is 2 decimal places).
	--
	-- Example Usage:
	-- currency_plus(123.45678) -> '$123.46'
	-- currency_plus(123.45678, 0) -> '$123'
	-- currency_plus(123.45678, 3) -> '$123.457'

ewalstad / python_conversion.md

Created April 25, 2013 16:36 — forked from Nurdok/python_conversion.md

Python Number Conversion Chart

From	To	Expression

ewalstad / pg_dump_ssh.sh

Last active December 9, 2015 22:48

Transfer a db from one host to another from your local host. Dump the database on $SRC over ssh to the $TEST server. Load the db into the $DEST server using psql from the $TEST server.

	DEST="destination.example.com"
	SRC="source.example.com"
	TEST="testserver.example.com"
	DB="my_db"
	SSHER="mysshuser"

	ssh -C $SSHER@$SRC "pg_dump $DB" \| ssh -C $TEST "cat > /tmp/$DB.pgdump && dropdb -h$DEST $DB ; createdb -h$DEST $DB -E UTF-8 && psql -h$DEST $DB < /tmp/$DB.pgdump && rm /tmp/$DB.pgdump"

ewalstad / classtionary.py

Last active October 8, 2022 15:42

A Python class-like dictionary, or dictionary-like class, that allows access to values using dot notation. See the docstring for example usage.

	class Classtionary(dict):
	"""A Class, er, dictionary, um, attributes-as-keys thingy.

	>>> c = Classtionary(foo="bar")
	>>> d = dict(foo="bar")
	>>> c, d
	({'foo': 'bar'}, {'foo': 'bar'})
	>>> c.fizz = "bang"
	>>> d.fizz = "bang"
	Traceback (most recent call last):

Eric Walstad ewalstad

Python Number Conversion Chart