tylerneylon

-- Two dashes start a one-line comment.

--[[
     Adding two ['s and ]'s makes it a
     multi-line comment.
--]]

----------------------------------------------------
-- 1. Variables and flow control.
----------------------------------------------------

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

jbenet

/* 
author: jbenet
os x, compile with: gcc -o testo test.c 
linux, compile with: gcc -o testo test.c -lrt
*/

#include <time.h>
#include <sys/time.h>
#include <stdio.h>

corsix

Exploiting Lua 5.1 on 32-bit Windows

The following Lua program generates a Lua bytecode program called ignore-unsigned-sga.fnt, which in turn loads a DLL from within an extremely locked down Lua 5.1 sandbox in a program called RelicCOH2.exe. The remainder of this document attempts to explain how this program works by a whirlwind tour of relevent bits of the Lua 5.1 virtual machine.

if string.dump(function()end):sub(1, 12) ~= "\27Lua\81\0\1\4\4\4\8\0" then
  error("This generator requires a 32-bit version of Lua 5.1")
end

local function outer()
  local magic -- In bytecode, the stack slot corresponding to this local is changed

daurnimator

#!/usr/bin/env lua

local rockspec_name = assert(arg[1])

local function log(level, fmt, ...)
	io.stderr:write(level .. "\t" .. string.format(fmt, ...) .. "\n")
end

local function append(tbl, ...)
	for _, v in ipairs {...} do

jhass

python/
*.log

vishvananda

#!/bin/bash

if [ "$4" == "" ]; then
    echo "usage: $0 <local_ip> <remote_ip> <new_local_ip> <new_remote_ip>"
    echo "creates an ipsec tunnel between two machines"
    exit 1
fi

SRC="$1"; shift
DST="$1"; shift

a-dma

#!/bin/bash

# Bash script for setting or clearing touch requirements for
# cryptographic operations the OpenPGP application on a YubiKey 4.
#
# Author: Alessio Di Mauro <alessio@yubico.com>

GCA=$(which gpg-connect-agent)
DO=0
UIF=0

njonsson

#! /usr/bin/env ruby

def pluralize(word, count=2, plural_word=nil)
  plural_word ||= "#{word}s"
  "#{count} #{(count == 1) ? word : plural_word}"
end

unless (ARGV.length == 1) &&
       (good_revision = system("git log -1 #{ARGV.first} 2>/dev/null"))
  puts "Unknown revision '#{ARGV.first}'" unless good_revision

daurnimator

do
	local function helper ( allowed , want )
		return ( not want.type or allowed.type == "*" or ( allowed.type == want.type and
					( not want.subtype or allowed.subtype == "*" or allowed.subtype == want.subtype ) )
				) and allowed.q ~= 0
	end
	function choose_type ( allowed_list , wanted_list )
		-- Remove items from allowed list that have no match (retains client ordering)
		local res = { }
		local allowed_wanted_map = { }