Andrew Perkins arzon94

arzon94 / main.dart

Created August 24, 2020 21:32

calculate number of selected week days between dates with no loops

	void main() {
	DateTime t1 = DateTime.now();
	DateTime t2 = t1.add(Duration(days: 12));
	List<bool> activeDays = [true, true, true, true, true, false, false];
	int startday = t1.weekday, endday = t2.weekday;
	print("starts on $startday of week and ${t1.day} of month");
	print("ends on $endday of week and ${t2.day} of month");
	double numActiveDays = 0, extraneousDays = 0;
	int totalDays = t2.difference(t1).inDays;

arzon94 / .block

Last active May 23, 2019 17:40

impact analysis

license: mit

arzon94 / namedtuples

Last active November 15, 2018 15:35

tuples/named tuples are immutable, quick way of making a class

	# Why Python is Great: Namedtuples
	# Using namedtuple is way shorter than
	# defining a class manually:
	>>> from collections import namedtuple
	>>> Car = namedtuple('Car', 'color mileage')

	# Our new "Car" class works as expected:
	>>> my_car = Car('red', 3812.4)
	>>> my_car.color
	'red'

arzon94 / condensedBool

Created November 15, 2018 15:21

	# Different ways to test multiple
	# flags at once in Python
	x, y, z = 0, 1, 0

	if x == 1 or y == 1 or z == 1:
	print('passed')

	if 1 in (x, y, z):
	print('passed')

arzon94 / dictionarySort

Last active November 15, 2018 15:19

	# How to sort a Python dict by value
	# (== get a representation sorted by value)

	>>> xs = {'a': 4, 'b': 3, 'c': 2, 'd': 1}

	>>> sorted(xs.items(), key=lambda x: x[1])
	[('d', 1), ('c', 2), ('b', 3), ('a', 4)]

	# Or:

arzon94 / mergedictionaries

Created November 12, 2018 02:18

arzon94 / numanagrams

Created November 6, 2018 16:21

frozenset, collections counter, dictionary methods

	from collections import Counter
	# Complete the sherlockAndAnagrams function below.
	def sherlockAndAnagrams(s):
	count = 0
	anagramString = s
	dict1 = {}
	for i in range(len(s)):
	for j in range(1, len(s) - i + 1):
	key = frozenset(Counter(s[i:i+j]).items())
	dict1[key] = dict1.get(key, 0) + 1

arzon94 / bubblesort

Created October 24, 2018 20:47

arzon94 / binary_search

Created October 24, 2018 20:46

arzon94 / nginx

Created October 24, 2018 17:40

useful nginx commands and snippets

	#reload
	sudo nginx -s reload