In response to https://gist.github.com/jackrusher/5201340
Some observations about the entropy of bit sequences:
(seq-entropy '(0 0 0 0 1 1 1 1))
;; 1.0
(seq-entropy '(0 0 0 0))
;; 0.0
Evan Lawrence-Hurt evanlh
evanlh
/ Amplify test
Created
April 12, 2014 18:04
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| (ns amplifytest.core) | |
| (defn headerval [str] | |
| (let [intvals (map int (.getBytes str)) | |
| len (count intvals) | |
| v (reduce + (map-indexed (fn [i x] (* (Math/pow 26 (- len 1 i)) (- x 64))) intvals))] | |
| (int v))) | |
| (defn -main [& args] | |
| (doseq [line (line-seq (java.io.BufferedReader. *in*))] |
evanlh
/ layout.html
Last active
August 29, 2015 14:25
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <html lang="en" class="mdl-js"><head> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> | |
| <meta name="description" content="A front-end template that helps you build fast, modern mobile web apps."> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| <title>Material Design Lite</title> | |
| <!-- Add to homescreen for Chrome on Android --> | |
| <meta name="mobile-web-app-capable" content="yes"> |
evanlh
/ ThomasTest.js
Created
August 21, 2015 17:50
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| function Grid(M, N, mapFunction){ | |
| this.grid = []; | |
| this.M = M; | |
| this.N = N; | |
| if (M < 1 || N <1) throw new Error('Grid dimensions must be greater than 0'); | |
| if (typeof mapFunction == 'function'){ | |
| this.init(mapFunction); | |
| } |
evanlh
/ kontor-test.js
Created
September 14, 2015 02:55
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /** | |
| * Creates a new Cart object, with an optional pricing parameter. | |
| * @class | |
| * @param {object} pricing | |
| */ | |
| function Cart(prices){ | |
| this.total = 0, | |
| this.pricing = {}, | |
| this.contents = {}; |
evanlh
/ BloomFilter.java
Created
May 7, 2011 03:14
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package katas.kata5; | |
| import java.io.BufferedReader; | |
| import java.io.IOException; | |
| import java.io.Reader; | |
| import java.security.MessageDigest; | |
| import java.security.NoSuchAlgorithmException; | |
| import java.util.BitSet; | |
| public class BloomFilter { |
evanlh
/ git and npm behind firewall.txt
Created
October 26, 2015 21:56
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| git config --global http.sslVerify false | |
| npm config set strict-ssl false | |
| ~/.bowerrc | |
| { | |
| "directory": "bower_components", | |
| "registry": "http://bower.herokuapp.com", | |
| "strict-ssl": false | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| ;; -*- emacs-lisp -*- | |
| ;; | |
| ;; The majority of this config is from Jack Rusher-- https://github.com/jackrusher/dotfiles | |
| ;; (Minor personal changes made by me -- @evanlh) | |
| ;; | |
| ;; I like my emacs to share as many behaviors as possible with OS | |
| ;; X and bash, to which end I've customized all three. | |
| (require 'cl) ;; Common Lisp functions |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| ;; Begin Evan's attempt at section 11.3 | |
| ;; from http://www.doc.ic.ac.uk/~sgc/teaching/pre2012/v231/lecture11.html | |
| (def examples | |
| [{:weather :sunny, :parents :yes, :money :rich, :decision :cinema} | |
| {:weather :sunny, :parents :no, :money :rich, :decision :tennis} | |
| {:weather :windy, :parents :yes, :money :rich, :decision :cinema} | |
| {:weather :rainy, :parents :yes, :money :poor, :decision :cinema} | |
| {:weather :rainy, :parents :no, :money :rich, :decision :stayin} | |
| {:weather :rainy, :parents :yes, :money :poor, :decision :cinema} | |
| {:weather :windy, :parents :no, :money :poor, :decision :cinema} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| ;; Response to https://gist.github.com/jackrusher/5289206 | |
| ;; Fill in this definition of seq-entropy that takes a second | |
| ;; parameter that's the function that returns 'true' when a given item | |
| ;; is positive. | |
| (defn seq-entropy | |
| "Calculate the entropy of sequence 'sq' assuming the all positive | |
| numbers represent positive samples." | |
| [sq pos-func] | |
| (let [len (count sq) |
OlderNewer