michaelficarra’s gists

michaelficarra / set.prototype.map.js

Last active August 29, 2015 14:10

ES6 Set.prototype.map issue

	var set = new Set([0, 1]),
	f = function(x) { return 1 / x; },
	g = function(x) { return x ? -0 : x; };
	set.map(g); // Set{0}
	set.map(g).map(f); // Set{1/0}
	set.map(function(x){ return f(g(x)); }); // Set{1/0, -1/0}

michaelficarra / monads.js

Last active August 29, 2015 14:07 — forked from pselle/monads.js

	function Container(val) {
	this.val = val
	}

	// Functor's `fmap` in Haskell
	Container.prototype.map = function(f) {
	return new Container(f(this.val));
	};

	// Monad's `>>=` (pronounced bind) in Haskell

michaelficarra / textnode-innerhtml.js

Last active August 29, 2015 14:06 — forked from benvinegar/textnode-innerhtml.js

	/**
	* Proof of concept ESLint rule for warning about potential
	* XSS vulnerabilities caused by mixing innerHTML/text node
	* property access.
	*
	* More here: http://benv.ca/2012/10/2/you-are-probably-misusing-DOM-text-methods/
	*/
	'use strict';

	var WARNING_MSG =

michaelficarra / matasano.hs

Created October 17, 2013 21:38

matasano crypto class notes/assignments

	import Data.Char
	import Data.Word
	import Data.Bits
	import Data.List
	import Data.Maybe
	import qualified Data.ByteString as B

	import Codec.Crypto.AES

	repeatedKeyXor = do

michaelficarra / persistence.hs

Last active December 20, 2015 08:19

http://en.wikipedia.org/wiki/Persistence_of_a_number

	import Data.List (unfoldr)
	import Data.Tuple (swap)
	import System.IO (hSetBuffering, stdout, BufferMode(..))

	placeValues base = reverse . unfoldr (\x -> if x == 0 then Nothing else Just $ swap $ divMod x base)
	persistencePath base x = if x < base then [x] else x : (persistencePath base $ product $ placeValues base x)
	persistence base n = length (persistencePath base n) - 1
	lowestNumberSuchThat f = head $ dropWhile (not . f) [0..]

	main = do

michaelficarra / gist:5976187

Created July 11, 2013 14:59

masksOfLength x = iterate (\y -> map (True:) y ++ map (False:) y) [[]] !! x

michaelficarra / github-screenshots.user.js

Last active December 19, 2015 00:49

make a github repo presentable for screenshots

	// ==UserScript==
	// @name Github Screenshots
	// @description make a github repo presentable for screenshots
	// @match https://github.com/*
	// @version 0.0.1
	// ==/UserScript==

	function hide (node) {
	node.style.display = 'none';
	}

michaelficarra / index.html

Created May 18, 2013 14:32

example password strength meter using lowe/zxcvbn

michaelficarra / levels.coffee

Last active December 17, 2015 00:49

identifier-only scope colouring levels

	fs = require 'fs'

	esprima = require 'esprima'
	escope = require 'escope'
	eslevels = require 'eslevels'

	js = (fs.readFileSync './input.js').toString()
	ast = esprima.parse js, {range: yes}
	scopes = (escope.analyze ast).scopes

michaelficarra / gist:4945178

Created February 13, 2013 15:00

diagrams to keep my head straight while parsing infix binary operators

Michael Ficarra michaelficarra