#Non-mathematical Introductions
- http://gcn.com/articles/2014/01/09/topographical-data-analysis.aspx
- https://www.simonsfoundation.org/quanta/20131004-the-mathematical-shape-of-things-to-come/
#Videos
// by alex evans, 2011. released into the public domain. | |
// based on a first ever reading of the png spec, it occurs to me that a minimal png encoder should be quite simple. | |
// this is a first stab - may be buggy! the only external dependency is zlib and some basic typedefs (u32, u8) | |
// | |
// VERSION 0.02! now using zlib's crc rather than my own, and avoiding a memcpy and memory scribbler in the old one | |
// by passing the zero byte at the start of the scanline to zlib first, then the original scanline in place. WIN! | |
// | |
// more context at http://altdevblogaday.org/2011/04/06/a-smaller-jpg-encoder/. | |
// | |
// follow me on twitter @mmalex http://twitter.com/mmalex |
#!/usr/bin/env python | |
# -*- coding: utf-8 -*- | |
# (c) 2011 Raphael Jasjukaitis <[email protected]> | |
import csv | |
import os | |
import sys | |
from optparse import OptionParser |
""" | |
Created on Fri Jan 27 21:48:58 2012 | |
@author: jay | |
""" | |
import json | |
import os | |
import gdbm | |
import time |
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
function listFilesInFolder() { | |
var folder = DocsList.getFolder("Maudesley Debates"); | |
var contents = folder.getFiles(); | |
var file; | |
var data; | |
var sheet = SpreadsheetApp.getActiveSheet(); | |
sheet.clear(); | |
ALSO SEE THIS: http://eddychan.com/post/18484749431/minimum-viable-ops-deploying-your-first-django-app-to | |
AND THIS: http://bitnami.com/stack/django | |
These are my notes on how to quickly setup a python, virtualenv (use virtualenv-burrito FTW), and django. | |
Setup an EC-2 instance: | |
======================= | |
Use the quick launch wizard: |
#Non-mathematical Introductions
#Videos
import json | |
with open ("/Users/nabuco/Library/Application Support/Google/Chrome/Default/Bookmarks") as f: | |
caca = json.load(f) | |
bookmarks = caca['roots']['other']['children'][0]['children'][1]['children'] | |
for obj in dookmarks: | |
print obj['url'] |
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.