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goulu / fibonacci.py

Last active April 26, 2017 05:20

compute fibonacci(n)%m for very large n

	from Goulib.math2 import digits, identity

	def mod_matmul(A,B, mod=0):
	return [[sum(ab for a,b in zip(A_row,B_col))%mod for B_col in zip(B)] for A_row in A]

	def mod_matpow(M, power, mod=0):
	result = identity(2)
	for power in digits(power,2,True):
	if power:
	result = mod_matmul(result, M, mod)

goulu / metercst.py

Last active May 26, 2017 08:54

Finds a better constant than 299792458 to define the meter

	from fractions import gcd

	s=9192631770 # number of caesium oscillations in a second
	bestm=299792458 # fraction of a second in a meter
	bestgcd=gcd(s,bestm) #14 . we want a larger one
	for m in range(299792458, 300000000):
	g=gcd(s,m)
	if g>bestgcd:
	bestm,bestgcd=m,g
	print(bestgcd,bestm,s/bestgcd,m/bestgcd)

goulu / image.js

Last active June 11, 2018 08:06

D3 zoomable canvas class

	const margin = {top: 20, right: 10, bottom: 20, left: 60};

	class Figure {

	constructor(div,width,height) {
	this.width = width;
	this.height = height;

	// Canvas is drawn first, and then SVG over the top.
	this.canvas = div.append("canvas")

goulu / python_finesses.ipynb

Created June 23, 2018 08:53

Finesses de python

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goulu / index.html

Last active June 27, 2018 10:45

Table using D3.js and clusterize.js

	<!doctype html>
	<html>
	<head>
	<meta charset="utf-8"/>
	<title>D3Table</title>
	<link rel="stylesheet" href="https://rawgit.com/goulu/Clusterize.js/master/clusterize.css"></script>
	<script src="https://rawgit.com/goulu/Clusterize.js/master/clusterize.js"></script>
	<script src='http://d3js.org/d3.v3.js' type='text/javascript'></script>
	<script src="./table.js" type='text/javascript'></script>
	</head>

goulu / passall.py

Last active May 16, 2019 18:26

very (un)useful class for test driven development: objects of the PassAll class will pass any test you can think of :-D

	import inspect
	import re

	regexes=[
	r"assert\((.)(==\|!=\|>\|<)(.)\)",
	#TODO: expand for test frameworks like unittest, nose ...
	]

	def _make_true(op,value):
	# returns a value that satisfies comparizon

goulu / gogolplex.py

Created May 28, 2021 05:30

"stores" and prints gogol and gogolplex numbers

	from itertools import product
	from Goulib.itertools2 import ilen

	ten = range(10)

	def tenpow(p):
	# p is the log of exponent
	return product(ten, repeat=p)

	def tenprint(iter):