To an aspiring coach:
| 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 |
| #!/bin/sh | |
| # | |
| # gpgedit: edit an encrypted file with an associated list of recipients | |
| # | |
| # $ gpgedit secrets.gpg | |
| # | |
| # gpgedit needs the companion file "secrets.rcp" to exist, and contains a list | |
| # of intended recipients, one per line. The recipient file can contain end-of- | |
| # line comments, starting with the "#" character. |
| (ns noize.core | |
| (:use [overtone.live :exclude [midi->hz sharp flat scale run pitch shift]])) | |
| (definst harps# [freq 440] | |
| (let [duration 1] | |
| (* | |
| (line:kr 1 1 duration FREE) | |
| (pluck (* (white-noise) (env-gen (perc 0.001 5) :action FREE)) 1 1 (/ 1 freq) (* duration 2) 0.25)))) | |
| (def midi-0 8.1757989156) |
Here are the areas I've been researching, some things I've read and some open source packages...
Nearly all text processing starts by transforming text into vectors: http://en.wikipedia.org/wiki/Vector_space_model
Often it uses transforms such as TFIDF to normalise the data and control for outliers (words that are too frequent or too rare confuse the algorithms): http://en.wikipedia.org/wiki/Tf%E2%80%93idf
Collocations is a technique to detect when two or more words occur more commonly together than separately (e.g. "wishy-washy" in English) - I use this to group words into n-gram tokens because many NLP techniques consider each word as if it's independent of all the others in a document, ignoring order: http://matpalm.com/blog/2011/10/22/collocations_1/
If you're coming to the Property-Based TDD As If You Meant It Workshop, you will need to bring a laptop with your favourite programming environment, a property-based testing library and, depending on the language, a test framework to run the property-based-tests.
Any other languages or suggestions? Comment below.
.NET (C#, F#, VB)
Python:
| #!/bin/bash | |
| # Usage: merge-to-subdir source-repo destination-repo subdir | |
| # | |
| # Merges the history of source-repo into destination-repo as the | |
| # history of the subdirectory subdir. | |
| # | |
| # source-repo can be local or remote. | |
| # destination-repo must be local to the machine. | |
| # subdir can be a relative path, in which case intermediate |
| # This is a very basic script to backup oyster card data to a scraperwiki vault | |
| # Notes: | |
| # 1) You need an oyster card that has been registered on tfl.gov.uk | |
| # 2) This script requires you to enter your username and password (this about what that means before progressing, and do so at your own risk) | |
| # 3) This script should be run in a PRIVATE SCRAPERWIKI VAULT ONLY https://scraperwiki.com/pricing/ not a public scraper, or the world will know your password | |
| import scraperwiki | |
| import mechanize | |
| import lxml.html | |
| from lxml.etree import tostring |
I operate a policy of having days in which I try hard to not have meetings. If you're reading this, chances are you've looked at my calendar and are wondering what kind of meeting takes all day and happens so frequently. It's not an actual meeting, it is a reservation of the day.
When you're operating on the maker's schedule, meetings are a disaster. A single meeting can blow a whole afternoon, by breaking it into two pieces each too small to do anything hard in.
— Maker's Schedule, Manager's Schedule by Paul Graham
If you still need to book a meeting with me on a reserved day, go ahead. I'll accept it if I think it's more important than having time for coding and thinking and solving hard problems.
| config.vm.provider :vmware_fusion do |vm| | |
| vdiskmanager = '/Applications/VMware\ Fusion.app/Contents/Library/vmware-vdiskmanager' | |
| dir = "#{ENV['HOME']}/vagrant-additional-disk" | |
| unless File.directory?( dir ) | |
| Dir.mkdir dir | |
| end |