Chris Anderson jchris

Stacks, Platforms, and Databases

jchris / learnifthen.js

Created December 20, 2010 21:17

teaching amysue javascript

	rainPain = function(temp, cip) {
	if (temp < 39) {
	console.log ("too cold!")
	} else if (temp<80 && cip){
	console.log("ouch")
	} else {
	console.log("time to walk the dogs")
	}
	}
	rainPain(75, true)

jchris / couchapp.html

Created November 27, 2010 15:14

the smallest possible CouchApp

	<!DOCTYPE html>
	<html>
	<!-- This should be the simplest possible jQuery based CouchApp. Install by uploading to a design document in Futon or putting in _attachments/index.html and running `couchapp push` -->
	<head><title>Tiny CouchApp</title></head>
	<body>
	<h1>Tiny CouchApp</h1>
	<ul id="databases"></ul>
	</body>
	<script src="/_utils/script/jquery.js"></script>
	<script src="/_utils/script/jquery.couch.js"></script>

jchris / reduce.js

Created November 26, 2010 04:41

unique key count reduce

	function(ks, vs, rr) {
	// values are discarded by reduce
	// todo: configurable key function, for complex queries
	var fk, lk;
	function uniqCount(keys) {
	var count = 0, obj = {};
	for (var i=0; i < keys.length; i++) {
	if (!obj[keys[i]]) {
	count++;
	obj[keys[i]] = true;

jchris / ga_stats.rb

Created November 16, 2010 05:50

	require 'rubygems'
	require 'garb'
	# couchrest is only required because it makes the dates to_json into
	# something javascript can parse.
	require 'couchrest'

	class OpenStruct
	def to_json
	table.to_json
	end

jchris / topN.js

Created October 31, 2010 15:03

a CouchDB list function for returning the top Terms in where the key is like [Term|_Rest]

	function(seq, req) {
	var min = 0, term, count, row
	, i, top = parseInt(req.query.top), match = [];
	while (row = getRow()) {
	term = row.key[0];
	count = row.value;
	if (match.length < top) {
	match.push([term, count]);
	} else {
	if (count > min) {

jchris / hashfiles.rb

Created July 5, 2010 20:05

	require 'digest/md5'

	# usage: run this in the root directory of your iTunes Music folder, or wherever, and pipe the output to a file
	# next, pipe the output of that file through `sort` to a new file
	# now, use the next script on that file

	ls = Dir['*/']

	ls.each_with_index do \|f, i\|
	STDERR.puts ls.length - i if (i % 100 == 0)

jchris / xspf_parser.js

Created October 11, 2009 06:01

	// Copyright J. Chris Anderson 2007
	// Retain this notice.
	// Released under the LGPL 2.1
	// http://creativecommons.org/licenses/LGPL/2.1/

	XSPF = {
	XMLfromString: function(string) {
	if (window.ActiveXObject) {
	var doc = new ActiveXObject("Microsoft.XMLDOM");
	doc.async = "false";

jchris / gist:117388

Created May 25, 2009 05:07 — forked from brianmario/gist:117379

	require 'lib/yajl/http_stream'
	require 'uri'

	uri = URI.parse('http://jchrisa.net/toast/_changes')
	Yajl::HttpStream.get(uri) do \|hash\|
	# will take a few seconds, since the response is a single ~4MB JSON string
	# if the response was a bunch of individual JSON strings, this would be fired
	# for every string parsed off the stream, as they were parsed
	puts hash.inspect
	end

jchris / benchbulk.sh

Created March 15, 2009 02:48

benchmarking CouchDB bulk inserts in bash

	#!/bin/bash

	# usage: time benchbulk.sh dbname
	# it takes about 30 seconds to run on my old MacBook

	BULKSIZE=1000
	DOCSIZE=100
	INSERTS=10
	ROUNDS=10
	DBURL="http://localhost:5984/$1"

jchris / couchdb_upgrade.rb

Created March 15, 2009 02:14

	require 'rubygems'
	require 'couchrest'

	# this is the CouchDB where all the old databases are
	OLD_HOST = "http://127.0.0.1:5984"

	# this is the CouchDB we want to copy to
	NEW_HOST = "http://127.0.0.1:5985"

	old_couch = CouchRest.new(OLD_HOST)