JB julienbenjamin

Orthodox C++

What is Orthodox C++?

Orthodox C++ (sometimes referred as C+) is minimal subset of C++ that improves C, but avoids all unnecessary things from so called Modern C++. It's exactly opposite of what Modern C++ suppose to be.

Why not Modern C++?

Don't use VPN services.

No, seriously, don't. You're probably reading this because you've asked what VPN service to use, and this is the answer.

Note: The content in this post does not apply to using VPN for their intended purpose; that is, as a virtual private (internal) network. It only applies to using it as a glorified proxy, which is what every third-party "VPN provider" does.

A Russian translation of this article can be found here, contributed by Timur Demin.
A Turkish translation can be found here, contributed by agyild.
There's also this article about VPN services, which is honestly better written (and has more cat pictures!) than my article.

To remove a submodule you need to:

Delete the relevant section from the .gitmodules file.
Stage the .gitmodules changes git add .gitmodules
Delete the relevant section from .git/config.
Run git rm --cached path_to_submodule (no trailing slash).
Run rm -rf .git/modules/path_to_submodule (no trailing slash).
Commit git commit -m "Removed submodule "
Delete the now untracked submodule files rm -rf path_to_submodule

To limit a CPU to a certain C-state, you can pass the processor.max_cstate=X option in the kernel line of /boot/grub/grub.conf.

Here we limit the system to only C-State 1:

    kernel /vmlinuz-2.6.18-371.1.2.el5 ... processor.max_cstate=1

On some systems, the kernel can override the BIOS setting, and the parameter intel_idle.max_cstate=0 may be required to ensure sleep states are not entered:

git cheat-sheet

The git command-line utility has plenty of inconsistencies http://steveko.wordpress.com/2012/02/24/10-things-i-hate-about-git/

A GUI like http://sourcetreeapp.com is often helpful, but staying on the command line usually quicker. This is a list of the commands I use most frequently, listed by functional category:

Current state

git status list which (unstaged) files have changed

Raspberry Pi general optimization

Use a class 10 SD card for best speed. The USB bus can't come much higher than 30MB/s so you don't have to buy any extremely fast ones though. Not all cards are compatible, check the compatibility list: http://elinux.org/RPi_SD_cards
Use the HardFloat version of Raspbian instead of the SoftFloat. HF has much faster floating point operations - however SF is required for running Java. So it's either Java or performance, like normal.
The official Raspbian image gives low network speeds: http://elinux.org/RPi_Performance#NIC
A graphics driver by Simon / teh_orph is using hardware acceleration for some instructions: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=63&t=28294 installation instructions: http://elinux.org/RPi_Xorg_rpi_Driver
The firmware can be upgraded which gives, among other things, better GPU performance.

	10-Bit H.264

	For all those who haven’t heard of it already, here’s a quick rundown about the
	newest trend in making our encodes unplayable on even more systems: So-called
	high-bit-depth H.264. So, why another format, and what makes this stuff
	different from what you know already?

	First off: What is bit depth?
	In short, bit depth is the level of precision that’s available for storing color
	information. The encodes you’re used to have a precision of 8 bits (256 levels)

	#!/bin/bash

	# https://gist.github.com/robwierzbowski/5430952/
	# Create and push to a new github repo from the command line.
	# Grabs sensible defaults from the containing folder and `.gitconfig`.
	# Refinements welcome.

	# Gather constant vars
	CURRENTDIR=${PWD##*/}
	GITHUBUSER=$(git config github.user)

	// this file is an example of how to intercept a C++ method by using the
	// LD_PRELOAD environment variable of the GNU dynamic linker.
	//
	// it works like this:
	//
	// 1) define a method that will have the same symbol as the intercepted
	// method when compiled. For example, the method Foo::getValue()
	// defined here has the mangled symbol "_ZNK3Foo8getValueEv".
	// tools like nm, objdump or readelf can display the symbols of
	// binaries. note that depending on compiler and linker options,

	#!/usr/bin/perl

	# Ref: Calculating CPU Usage from /proc/stat
	# (http://colby.id.au/node/39)

	use strict;
	use warnings 'all';
	use utf8;

	use List::Util qw(sum);