vladborovtsov

# xcode-build-bump.sh
# @desc Auto-increment the build number every time the project is run. 
# @usage
# 1. Select: your Target in Xcode
# 2. Select: Build Phases Tab
# 3. Select: Add Build Phase -> Add Run Script
# 4. Paste code below in to new "Run Script" section
# 5. Drag the "Run Script" below "Link Binaries With Libraries"
# 6. Insure that your starting build number is set to a whole integer and not a float (e.g. 1, not 1.0)

vladborovtsov

- (UIColor *) randomBrightColor {
  UIColor *c = nil;
  CGFloat hue = ( arc4random() % 256 / 256.0 );  //  0.0 to 1.0
  CGFloat saturation = ( arc4random() % 128 / 256.0 ) + 0.5;  //  0.5 to 1.0, away from white
  CGFloat brightness = ( arc4random() % 128 / 256.0 ) + 0.5;  //  0.5 to 1.0, away from black
  c = [UIColor colorWithHue:hue saturation:saturation brightness:brightness alpha:1.0f];
  return c;
}

vladborovtsov

AWS ELB with Node.js and WebSockets

This assumes that:

• You are using Nginx.
• You want to accept incoming connections on port 80.
• Your Node.js app is listening on port 3000.
• You want to be able to connect to your Node.js instance directly as well as via the load balancer.

####1. Create load balancer

vladborovtsov

from django.db import connections
from django.db.models.query import QuerySet
from __future__ import print_function

class QuerySetExplainMixin:
    def explain(self, analyze=True):
        cursor = connections[self.db].cursor()
        print(self.query)
        print()
        sql, params = self.query.sql_with_params()

vladborovtsov

import os
from PIL import Image


def extractFrames(inGif, outFolder):
    frame = Image.open(inGif)
    nframes = 0
    while frame:
        frame.save( '%s/%s-%s.gif' % (outFolder, os.path.basename(inGif), nframes ) , 'GIF')
        nframes += 1

vladborovtsov

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

vladborovtsov

openssl req -new -newkey rsa:2048 -nodes -keyout yourdomain.key -out yourdomain.csr

http://support.godaddy.com/help/article/3601/generating-a-certificate-signing-request-nginx
http://support.godaddy.com/help/article/4976/rekeying-an-ssl-certificate

# Be sure to remember to chain them!
cat gd_bundle-g2-g1.crt >> yourdomain.crt

# Move 'em
sudo mv yourdomain.crt /etc/ssl/certs/yourdomain.crt

vladborovtsov

# You don't need Fog in Ruby or some other library to upload to S3 -- shell works perfectly fine
# This is how I upload my new Sol Trader builds (http://soltrader.net)
# Based on a modified script from here: http://tmont.com/blargh/2014/1/uploading-to-s3-in-bash

S3KEY="my aws key"
S3SECRET="my aws secret" # pass these in

function putS3
{
  path=$1

vladborovtsov

#MongoDB 3.2.x Replica Sets on AWS EC2 A MongoDB replica set provides a mechanism to allow for a reliable database services. The basic replica set consists of three servers, a primary, a secondary and an arbitrator. The primary and secondary both hold a copy of the data. The arbitrator is normally a low spec server which just monitors the other servers and help with the failover process. In production, there can be more than three servers.

To setup mongo as a replica set on Amazon Web Services EC2 you need to first setup a security group with ssh on port 22 and mongodb on port 27017. You then need to create three servers. Select Ubuntu 14.04 LTS x64 and a micro (or bigger depending on your database size, ideally you should have enough memory to match your database size) instance for the primary and secondary and a nano instance for the arbitrator.

##Adjust the File System on each Server The operating system by default will update the last access time on a file. In a high data throughput database application

vladborovtsov

[program:mongodb]
command=/opt/mongodb/bin/mongod --dbpath /storage/mongodb_data --rest
directory=/opt/mongodb
user=root
autostart=false