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#lisp.py
#
#An interpreter for a simple scheme like lexically 
#scoped language implemented as single python expression.
#
#The interpreter is limited to the lambda special form and a
#sum function. The data types supported are positive integers
#and symbols.
#

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Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

• http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

• Does the design expect failures to happen regularly and handle them gracefully?
• Have we kept things as simple as possible?

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$ go run score.go 
Test: [1 2 3]
	score=0
Test: [2 1 3]
	score=1
Test: [3 2 1]
	score=2
Test: [1 2 4 3 5]
	score=1
Test: [1 2 4 3 5 6 8 9 7]

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# instead of:

match = someregex.match(line)
if match:
   print match.groups()
else:
   print 'boo'

# why not make use of the 'as' keyword and do something like:
if someregex.match(line) as match:

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# quick and dirty inverted index

import re, os

class InvertedIndex(object):
    def __init__(self):
        self._data = {}

    def add(self, words, document):
        for word in words:

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# broken, hacked up version of 
# http://bret.appspot.com/entry/how-friendfeed-uses-mysql for sqlite

# database = bequas.Database('something.db')
# database.initialize(); database.create_index('hello', unique=True); 
# database.insert({'hello': 'world'})

import sqlite3
import uuid
import datetime

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import zmq, time


def main(addr):
    print addr
    context = zmq.Context(1, 1)
    socket = context.socket(zmq.SUB)

    socket.setsockopt(zmq.SUBSCRIBE, "")
    socket.connect(addr)

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#!/bin/bash
# run in cron every 15 minutes to capture your tweets while on vacation

DATE=`date +"%Y-%m-%d-%H-%M"`

curl -u username:password http://twitter.com/statuses/friends_timeline.rss > 
/home/apgwoz/vacation-dumps/twitter/$DATE.rss

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"""ARGF from Ruby in Python.
"""

import sys, os


class _ARGF(object):

    def __init__(self):
        self.lineno = 1