jithinabraham

#ruby 2.3.1 recomended
class Graph
  attr_reader :graph, :nodes, :previous, :distance #getter methods
  INFINITY = 1 << 64

  def initialize
    @graph = {} # the graph // {node => { edge1 => weight, edge2 => weight}, node2 => ...
    @nodes = Array.new
  end

fernandoaleman

brew tap homebrew/versions
brew install v8-315

gem install libv8 -v '3.16.14.13' -- --with-system-v8
gem install therubyracer -- --with-v8-dir=/usr/local/opt/v8-315

bundle install

bastman

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

orlando

1. Run Software Update

Make sure everything is up to date in the App Store

2. Install Homebrew

1. Open a terminal window and execute the Homebrew install script:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

aPeacefull

#creating an input array with size = 12 and rang of values = 15
input = []
array_size = 12
range = 15
(0...array_size).each {input.push(rand(0..range))}

#the count_sort function does not modify the input array
#the complexity is O(n+k), n is the input array size, k is the input array range; this creates needs two additional arrays n and k-size
def count_sort (arr, range)
    count_arr = Array.new(range+1, 0)

protrolium

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

You can get the list of installed codecs with:

KamilLelonek

[1] (pry) main: 0> add = -> (a, b) { a + b }
=> #<Proc:0x007ffde11d72c0@(pry):1 (lambda)>

# Call proc with two arguments
[2] (pry) main: 0> add.(1, 2)
=> 3

# Call proc with one argument
[3] (pry) main: 0> add.(1)
ArgumentError: wrong number of arguments (1 for 2)

tomas-stefano

Pre-commit hook

This is a pre-commit script that will see the git diff and run the appropriate checks like JSHint and Rubocop

You can add to your .git/hooks of any repo that you like.

Notes

1. Don't forget to add the executable permission to this file and have the following installed:

komuw

#first seen here: http://www.snip2code.com/Snippet/63701/Ansible-task-to-install-nvm-and-node
# Here is how to install nvm and node in an Ansible task.
# I tried a bunch of different things, and as usual it's simple, but you have to get it right.
# The important part is that you have to shell with /bin/bash -c and source nvm.sh
---
- name: Install nvm
  shell: >
    curl https://raw.githubusercontent.com/creationix/nvm/v0.7.0/install.sh | sh
    creates=/home/{{ ansible_user_id }}/.nvm/nvm.sh

mlanett

=begin

  Include in your rspec config like so:

  RSpec.configure do |spec|
    spec.include RSpec::RedisHelper, redis: true
  end

  This helper will clean redis around each example.
=end