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@chrisroos
chrisroos / gpg-import-and-export-instructions.md
Created September 9, 2011 10:49
Instructions for exporting/importing (backup/restore) GPG keys

Every so often I have to restore my gpg keys and I'm never sure how best to do it. So, I've spent some time playing around with the various ways to export/import (backup/restore) keys.

Method 1

Backup the public and secret keyrings and trust database

cp ~/.gnupg/pubring.gpg /path/to/backups/
cp ~/.gnupg/secring.gpg /path/to/backups/
cp ~/.gnupg/trustdb.gpg /path/to/backups/

or, instead of backing up trustdb...

@menny
menny / verify_appstore_in_app.php
Last active February 15, 2024 14:45
How to verify in-app purchases from AppStore and Market in PHP code (server-side)
function verify_app_store_in_app($receipt, $is_sandbox)
{
//$sandbox should be TRUE if you want to test against itunes sandbox servers
if ($is_sandbox)
$verify_host = "ssl://sandbox.itunes.apple.com";
else
$verify_host = "ssl://buy.itunes.apple.com";
$json='{"receipt-data" : "'.$receipt.'" }';
//opening socket to itunes
@jboner
jboner / latency.txt
Last active May 31, 2024 08:23
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
@hellerbarde
hellerbarde / latency.markdown
Created May 31, 2012 13:16 — forked from jboner/latency.txt
Latency numbers every programmer should know

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

@jamikado
jamikado / TLFSprite.as
Created July 24, 2012 03:20
TLFSprite is a Starling extension that provides an alternative to starling.text.TextField to render text from OpenType or TrueType fonts (both device and embedded CFF) using the Text Layout Framework instead of flash.text.TextField
// =================================================================================================
//
// based on starling.text.TextField
// modified to use text layout framework engine for rendering text
//
// =================================================================================================
package starling.extensions
{
import flash.display.BitmapData;
@shaunus84
shaunus84 / Base64.as
Created July 31, 2012 12:15
TMX Loader Starling Extension
/*
* Copyright (C) 2012 Jean-Philippe Auclair
* Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
* Base64 library for ActionScript 3.0.
* By: Jean-Philippe Auclair : http://jpauclair.net
* Based on article: http://jpauclair.net/2010/01/09/base64-optimized-as3-lib/
* Benchmark:
* This version: encode: 260ms decode: 255ms
* Blog version: encode: 322ms decode: 694ms
* as3Crypto encode: 6728ms decode: 4098ms
@UniIsland
UniIsland / SimpleHTTPServerWithUpload.py
Created August 14, 2012 04:01
Simple Python Http Server with Upload
#!/usr/bin/env python
"""Simple HTTP Server With Upload.
This module builds on BaseHTTPServer by implementing the standard GET
and HEAD requests in a fairly straightforward manner.
"""
@1wErt3r
1wErt3r / SMBDIS.ASM
Created November 9, 2012 22:27
A Comprehensive Super Mario Bros. Disassembly
;SMBDIS.ASM - A COMPREHENSIVE SUPER MARIO BROS. DISASSEMBLY
;by doppelganger (doppelheathen@gmail.com)
;This file is provided for your own use as-is. It will require the character rom data
;and an iNES file header to get it to work.
;There are so many people I have to thank for this, that taking all the credit for
;myself would be an unforgivable act of arrogance. Without their help this would
;probably not be possible. So I thank all the peeps in the nesdev scene whose insight into
;the 6502 and the NES helped me learn how it works (you guys know who you are, there's no
/*
* linux 2.6.37-3.x.x x86_64, ~100 LOC
* gcc-4.6 -O2 semtex.c && ./a.out
* 2010 sd@fucksheep.org, salut!
*
* update may 2013:
* seems like centos 2.6.32 backported the perf bug, lol.
* jewgold to 115T6jzGrVMgQ2Nt1Wnua7Ch1EuL9WXT2g if you insist.
*/
-- How to disassemble kernel
Disassemble uncompressed kernel image binary by arm-linux-androideabi-objdump command in ndk
arm-linux-androideabi-objdump --disassemble-all -b binary -m arm --adjust-vma=0xc0008000 kernel.Image > kernel.dasm
-- How to get address for variable ptmx_fops
ptmx_fops is used in function unix98_pty_init.
unix98_pty_init()
{