iddoeldor

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

A few show tricks to find slow queries in mongodb

Enable profiling

First, you have to enable profiling

> db.setProfilingLevel(1)

Now let it run for a while. It collects the slow queries ( > 100ms) into a capped collections, so queries go in and if it's full, old queries go out, so don't be surprised that it's a moving target...

NERDTree

o.......Open files, directories and bookmarks....................|NERDTree-o|
go......Open selected file, but leave cursor in the NERDTree.....|NERDTree-go|
t.......Open selected node/bookmark in a new tab.................|NERDTree-t|
T.......Same as 't' but keep the focus on the current tab........|NERDTree-T|
i.......Open selected file in a split window.....................|NERDTree-i|
gi......Same as i, but leave the cursor on the NERDTree..........|NERDTree-gi|
s.......Open selected file in a new vsplit.......................|NERDTree-s|
gs......Same as s, but leave the cursor on the NERDTree..........|NERDTree-gs|

O.......Recursively open the selected directory..................|NERDTree-O|

(You can comment here.)

Here I'm trying to understand what happens when I run

./hello

#include

Week 1

An OS does basically two things. What are they?

Software that provides a programmer friendly interface between application programs and the hardware by providing a virtual environment to applications.

Software that handles resource requests from application programs and prevents applications from trampling each other.

	/*
	http://stackoverflow.com/questions/1371460/state-machines-tutorials/1371654#1371654

	State machines are very simple in C if you use function pointers.

	Basically you need 2 arrays - one for state function pointers and one for state
	transition rules. Every state function returns the code, you lookup state
	transition table by state and return code to find the next state and then
	just execute it.
	*/

	/**
	* More info?
	* [email protected]
	* http://aspyct.org
	*
	* Hope it helps :)
	*/

	#include <stdio.h>
	#include <stdlib.h>

	// Just before switching jobs:
	// Add one of these.
	// Preferably into the same commit where you do a large merge.
	//
	// This started as a tweet with a joke of "C++ pro-tip: #define private public",
	// and then it quickly escalated into more and more evil suggestions.
	// I've tried to capture interesting suggestions here.
	//
	// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
	// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

	#!/usr/bin/env bash
	if [ -z "$1" ]; then
	echo "usage: $(basename $0) <process>"
	exit 1
	fi

	IP=$(adb shell netcfg \| grep wlan0 \| awk '{print $3}' \| cut -d '/' -f1)
	if [ $? -ne 0 ]; then
	echo "device plugged in?"
	exit 1