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@fferen
fferen / randhist.py
Created October 11, 2012 01:39
Python script to open a random page from Chrome's history
#!/usr/bin/env python2
import sqlite3
import os
import sys
import webbrowser as wb
import urllib2
for path in (
os.path.expanduser('~/.config/google-chrome/'),
os.path.expanduser('~/.config/chromium/'),
@zhpengg
zhpengg / skip_list.c
Created June 5, 2012 07:52
skiplist implementation in c
/* Skip Lists: A Probabilistic Alternative to Balanced Trees */
#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#define SKIPLIST_MAX_LEVEL 6
typedef struct snode {
int key;
@Integralist
Integralist / web-server.rb
Created June 3, 2012 10:16
Create basic Web Server in Ruby (using WEBrick)
#!/usr/bin/env ruby
require "webrick"
=begin
WEBrick is a Ruby library that makes it easy to build an HTTP server with Ruby.
It comes with most installations of Ruby by default (it’s part of the standard library),
so you can usually create a basic web/HTTP server with only several lines of code.
The following code creates a generic WEBrick server on the local machine on port 1234,
@jboner
jboner / latency.txt
Last active May 15, 2025 07:53
Latency Numbers Every Programmer Should Know
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
@kesor
kesor / profile_middleware.py
Last active March 16, 2021 15:37
Django cProfile middleware
from django.core.exceptions import MiddlewareNotUsed
from django.conf import settings
import cProfile
import pstats
import marshal
from cStringIO import StringIO
class ProfileMiddleware(object):
def __init__(self):
if not settings.DEBUG:
@eventualbuddha
eventualbuddha / replay-proxy.js
Created January 6, 2011 16:16
Capture and replay HTTP requests and responses.
#!/usr/bin/env node
/**
* Capture or replay responses from an HTTP server.
*/
var sys = require('sys'),
path = require('path'),
args = process.argv.slice(2),
@eligrey
eligrey / object-watch.js
Created April 30, 2010 01:38
object.watch polyfill in ES5
/*
* object.watch polyfill
*
* 2012-04-03
*
* By Eli Grey, http://eligrey.com
* Public Domain.
* NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
*/
@JosephPecoraro
JosephPecoraro / shell-execution.rb
Last active March 19, 2025 06:46
Shell Execution in Ruby
# Ways to execute a shell script in Ruby
# Example Script - Joseph Pecoraro
cmd = "echo 'hi'" # Sample string that can be used
# 1. Kernel#` - commonly called backticks - `cmd`
# This is like many other languages, including bash, PHP, and Perl
# Synchronous (blocking)
# Returns the output of the shell command
# Docs: http://ruby-doc.org/core/classes/Kernel.html#M001111