williamstein’s gists

williamstein / foo.sage

Created August 1, 2011 23:50

	def foo(n):
	return n*n + 1

williamstein / gist:1119273

Created August 1, 2011 23:54

	def f(n):
	return n * n

williamstein / foo.sage

Created August 1, 2011 23:54

	def f(n):
	return n * n

williamstein / tofile cell decorator

Created September 19, 2013 22:01

Load this then put "%default_mode tofile" in a cloud.sagemath worksheet.

	def tofile(s):
	maxout=500
	import uuid
	filename = str(uuid.uuid4()) +'.log'
	o = open(filename,'w')

	stdout = sys.stdout
	class Stdout:
	def __init__(self):
	self.t = 0

williamstein / cloud-ipython.coffee

Created October 12, 2013 22:17

This is the code I wrote as part of https://cloud.sagemath.com in order to integrate IPython notebooks into my existing document synchronization infrastructure. It's CoffeeScript code that isn't meant to be run-able (I just copied it out of a bigger file). I just thought there could be some value in making this available under a BSD license, sin…

	###############################################################################
	# Copyright (c) 2013, William Stein
	# All rights reserved.
	#
	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions are met:
	#
	# 1. Redistributions of source code must retain the above copyright notice, this
	# list of conditions and the following disclaimer.
	# 2. Redistributions in binary form must reproduce the above copyright notice,

williamstein / gist:7386062

Created November 9, 2013 14:30

Making a 3d animation in the Sagemath Cloud http://youtu.be/lhirRHCW1q0

	%time

	filename_pattern = '/tmp/plt-%04d.png'

	@parallel
	def frame(n, filename):
	t = Tachyon(xres=800,yres=800, camera_center=(2,5,2), look_at=(2.5,0,0), antialiasing=True)
	t.light((0,0,100), 1, (1,1,1))
	t.texture('r', ambient=0.1, diffuse=0.9, specular=0.5, opacity=1.0, color=(1,0,0))
	for i in range(n):

williamstein / smcarch56

Last active January 2, 2016 05:59

SageMath Cloud backend architecture talk at Sage Days 56

	# SageMath Cloud backend architecture talk at Sage Days 56

	## Guiding principles

	- A place for everybody to use all math-related software easily, especially (but not only!) open source

	- High availability: automatically survive failure of any proper subset of datacenters

	- Make it very hard to permanently lose work:
	- everything has synchronization

williamstein / proxy

Created January 24, 2014 17:23

	httpProxy = require('http-proxy')

	init_http_proxy_server = () =>

	_remember_me_check_for_write_access_to_project = (opts) ->
	opts = defaults opts,
	project_id : required
	remember_me : required
	cb : required # cb(err, has_access)
	account_id = undefined

williamstein / gist:49fc9a2857c89f099f69

Created August 14, 2014 17:30

for http://stackoverflow.com/questions/25310960/invalid-syntax-error-at-the-end-of-a-concatenated-list

	~$ python
	Python 2.7.6 (default, Mar 22 2014, 22:59:56)
	[GCC 4.8.2] on linux2
	Type "help", "copyright", "credits" or "license" for more information.
	>>> import regs_180k_200k_conca
	Traceback (most recent call last):
	File "<stdin>", line 1, in <module>
	File "regs_180k_200k_conca.py", line 5484

williamstein / OrbitControls.js

Created September 18, 2014 17:30

Modification of THREE.js http://threejs.org/examples/js/controls/OrbitControls.js, but so that holding alt or command enables pan and holding shift or control enables zoom. This is for people like Mac users that have only one mouse button, but still want to pan using the mouse. I use this in SageMathCloud, where I can't enable the OrbitControls …

	/**
	* @author qiao / https://github.com/qiao
	* @author mrdoob / http://mrdoob.com
	* @author alteredq / http://alteredqualia.com/
	* @author WestLangley / http://github.com/WestLangley
	* @author erich666 / http://erichaines.com
	*/
	/global THREE, console /

	// This set of controls performs orbiting, dollying (zooming), and panning. It maintains

William Stein williamstein