mihar

array.reduce(true) { |x, y| x and y }

Useful for checking in Rails if a collection of models all have a flag set to true.

E.g.:

signers.map(&:ready?).reduce(true) { |x, y| x and y }

More examples:

mihar

Keybase proof

I hereby claim:

• I am mihar on github.
• I am mihar (https://keybase.io/mihar) on keybase.
• I have a public key whose fingerprint is 8C74 E3A9 2C2D BF69 11F9 2DA1 BA08 69AE 85A1 6F9E

To claim this, I am signing this object:

mihar

### Inside the helper file that uses it.
class Spitter
  include ActionView::Helpers::TagHelper
  include ActionView::Helpers::TextHelper
  include ActionView::Helpers::UrlHelper
  
  def initialize(klass)
    @klass = klass
  end

mihar

require 'active_record'

class ActiveRecord::Base
  def self.magic!
    connection.tables.map { |table|
      klass = Class.new(self)
      Object.send(:const_set, table.singularize.camelize, klass)
    }.each { |model|
      model.column_names.grep(/_id$/).each { |foreign_key|
        name = foreign_key.sub(/_id$/, '')

mihar

require 'rubygems'
require 'activesupport'

# Lorem Ipsum
words = %w{lorem ipsum dolor sit amet consectetuer adipiscing elit phasellus hendrerit pellentesque aliquet nibh nec urna in nisi neque vel dapibus id mattis sed pretium ligula sollicitudin laoreet viverra tortor libero sodales leo eget blandit nunc eu nullam mollis ut justo suspendisse potenti egestas ante et vulputate volutpat eros pede semper est vitae luctus metus augue morbi purus faucibus commodo quis gravida lectus praesent elementum at felis vestibulum lacus a ultrices sagittis mi euismod dui pulvinar sapien ornare nisl arcu fermentum interdum ac risus lacinia magna ullamcorper facilisis mauris varius tellus etiam ultricies integer fusce accumsan diam vehicula sem massa malesuada non congue scelerisque vivamus tristique iaculis imperdiet feugiat convallis odio aliquam posuere nulla quisque cum sociis natoque penatibus magnis dis parturient montes nascetur ridiculus mus condimentum dignissim proin donec curabitur}

@words = words.reject { |word|

mihar

get '/*.css' do
  content_type 'text/css', :charset => 'utf-8'
  sass params[:splat].join.to_sym
end

mihar

String.prototype.strip_html = function() {
  var tmp = document.createElement("DIV");
  tmp.innerHTML = this;
  return tmp.textContent || tmp.innerText;
}

mihar

Array.prototype.remove = function(element) {
  this.splice(this.indexOf(element), 1)
}

mihar

Orderbook price calculation

Write a function btc2usd that calculates how much dollars you need to buy X bitcoin at this moment.

A sample asks part of the orderbook looks like this:

asks = [['1.00000000', '100.00', 1], ['2.00000000', '200.00', 2], ['4.00000000', '400.00', 4], ['8.00000000', '800.00', 8], ['16.00000000', '1600.00', 16]]
//        |              |       |    
// amount of btc price per BTC no. of equal orders

mihar

module SimpleStateMachine
  # Usage:
  #
  # First, extend your model of choise with this module
  #
  # extend SimpleStateMachine
  #
  # Then you can call the method states() and pass all the states
  # that your model supports. E.g.:
  #