Xion’s gists

Xion / truck_time.py

Created November 3, 2011 18:16

Very simple optimization problem

	# The wreck of a plane in a desert is 15 miles from the nearest point A on a straight road.
	# A rescue truck starts for the wreck at a point on the road that is 30 miles distant from A.
	# If the truck can travel at 80 mph on the road and at 40 mph on a straight path in the desert,
	# how far from A should the truck leave the road to reach the wreck in a minimum time?

	from math import sqrt

	def truck_time(turn_point):
	road_distance = turn_point
	skipped_road_distance = 30 - turn_point

Xion / compact.py

Created November 13, 2011 18:12

PHP compact() function in Python

	def compact(*args):
	''' compact() function, analoguous to the PHP version.
	Converts a series of (possible nested) iterables containing variable names
	into a dictionary mapping those names to variable values.
	Example:
	>>> x, y, z, a, b, c = 1, 2, 3, 4, 5, 6
	>>> compact('x', ['y','z'], ['a', ['b'], [['c']]])
	{'a': 4, 'b': 5, 'c': 6, 'x': 1, 'y': 2, 'z': 3}
	'''
	def _compact_arg(res, arg):

Xion / Coded4.hs

Created December 27, 2011 21:30

Haskell implementation of coded4 analyzer (simplified)

	-- Coded4.hs

	-- Simplified version of coded4 analyzer (http://github.com/Xion/coded4)
	-- Supports only Git repositories and produces less neatly formatted output

	-- usage:
	-- $ runghc Coded4.hs <path-to-git-repo>


	module Coded4 where

Xion / jinja_capture.py

Created January 30, 2012 20:45

	from jinja2.ext import Extension
	from jinja2.nodes import CallBlock, Output, MarkSafe

	class CaptureExtension(Extension):
	''' Generic capture extension, useful for providing
	content that should go into specific places in HTML template,
	such as the <head> tag for JavaScript includes.

	Syntax for providing content for so-called 'dataset' (here it's "js"):

Xion / gist:1804474

Created February 11, 2012 21:54

A neat little numerical puzzle

	This puzzle is (allegedly) solved by elementary school children in 5 to 10 minutes,
	but adults usually struggle with it much longer.

	8809=6
	7111=0
	2172=0
	6666=4
	1111=0
	3213=0
	7662=2

Xion / monads.py

Created March 23, 2012 15:47

Monads in Python!

Xion / missing_dict.py

Created April 5, 2012 21:49

dict with "missing" values

	import collections


	missing = object()

	class MissingDict(dict):
	"""Dictionary that supports a special 'missing' value.
	Assigning a missing value to key will remove the key from dictionary.
	Initializing a key with missing value will result in key not being
	added to dictionary at all.

Xion / pytz_patch.py

Created May 6, 2012 09:50

Patching pytz with import hook to have usable generic timezones

	"""
	Import hook extending pytz package with usable, generic timezones:
	GMT-14 up to GMT+12.

	Note that pytz already has Etc/GMT+X timezones, but
	(quoting Wikipedia):

	"In order to conform with the POSIX style, those zones beginning with "Etc/GMT"
	have their sign reversed from what most people expect. In this style,
	zones west of GMT have a positive sign and those east have a negative sign."

Xion / keyword_stats.py

Created May 28, 2012 16:39

Analysis of keywords in few popular languages

	"""
	Analyzing keywords from different programming languages.
	"""

	def word_stats(words):
	count = len(words)
	len_sum = sum(map(len, words))
	return {
	'count': count,
	'total_chars': len_sum,

Xion / almost_roguelike.py

Created August 5, 2012 15:57

Arrow-controlled movement in console with ncurses and Python

Karol Kuczmarski Xion