Carlos Marin carlosmarin

In August 2007 a hacker found a way to expose the PHP source code on facebook.com. He retrieved two files and then emailed them to me, and I wrote about the issue:

http://techcrunch.com/2007/08/11/facebook-source-code-leaked/

It became a big deal:

http://www.techmeme.com/070812/p1#a070812p1

The two files are index.php (the homepage) and search.php (the search page)

Geekdom Meditation

The purpose of this group is to spend time sitting in silence with the company of others. Sittings are 20 minutes long.

Join

Every Thursday, 7:30 am

Location: Geekdom, 11th floor, Licklidder Room

SQL to MongoDB Mapping Chart

SQL to MongoDB Mapping Chart¶

In addition to the charts that follow, you might want to consider the Frequently Asked Questions section for a selection of common questions about MongoDB.

Executables¶

The following table presents the MySQL/Oracle executables and the corresponding MongoDB executables.

	<snippet>
	<content><![CDATA[
	import ipdb; ipdb.set_trace()
	]]></content>
	<!-- Optional: Set a tabTrigger to define how to trigger the snippet -->
	<tabTrigger>ipdb</tabTrigger>
	<!-- Optional: Set a scope to limit where the snippet will trigger -->
	<scope>source.python</scope>
	</snippet>

	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

	// ==UserScript==
	// @name BetteridgeLinks
	// @description Lowlight headlines on Hacker News that conform to Betteridge's Law
	// @version 0.3
	// @match http://news.ycombinator.com/*
	// @author noibl <[email protected]>
	// ==/UserScript==

	var questions = ['Is', 'Are', 'Does', 'Do', 'Has', 'Have', 'Did', 'Will', 'Can', 'Could', 'Should'];
	var selector = '.title a';

	ggreer@carbon:~/code% curl -v -H 'Content-type: application/json' -H 'Content-type: text/plain' -d '{"auth": {"passwordCredentials": {"username": "reachnovadevops", "password": "NOPE"}}}' https://auth.api.rackspacecloud.com:443/v2.0/tokens
	* About to connect() to auth.api.rackspacecloud.com port 443 (#0)
	* Trying 67.192.1.11... connected
	* Connected to auth.api.rackspacecloud.com (67.192.1.11) port 443 (#0)
	* SSLv3, TLS handshake, Client hello (1):
	* SSLv3, TLS handshake, Server hello (2):
	* SSLv3, TLS handshake, CERT (11):
	* SSLv3, TLS handshake, Server finished (14):
	* SSLv3, TLS handshake, Client key exchange (16):
	* SSLv3, TLS change cipher, Client hello (1):

	30013:PRIMARY> db.setProfilingLevel(2);
	{ "was" : 0, "slowms" : 20, "ok" : 1 }
	30013:PRIMARY> db.t.drop();
	true
	30013:PRIMARY> x={a:1}
	{ "a" : 1 }
	30013:PRIMARY> db.t.insert(x);
	30013:PRIMARY> db.t.find();
	{ "_id" : ObjectId("508a12d8ae35c0f1400789e1"), "a" : 1 }
	30013:PRIMARY> db.system.profile.find({"ns":"test.t"});

	#!/bin/bash
	# ssh-multi
	# D.Kovalov
	# Based on http://linuxpixies.blogspot.jp/2011/06/tmux-copy-mode-and-how-to-control.html

	# a script to ssh multiple servers over multiple tmux panes


	starttmux() {
	if [ -z "$HOSTS" ]; then

	"""
	Programming interview practice of the week (2013-02-20)

	Problem of the week - Singletons considered okay


	1. Write a simple singleton class in your favorite programming language with an example usage.
	2. Solve the Sorted array binary search problem:
	Given a sorted array of integers array and an integer key, return the index of the first instance of key in the array. If key is not present in array, you should return -1.