kwent

# db/migrate/20200119064500_add_position_column_to_active_storage_attachments.rb

class AddPositionColumnToActiveStorageAttachments < ActiveRecord::Migration[6.0]
  def change
    add_column :active_storage_attachments, :position, :integer, default: 0
  end
end

xuyanke

sudo vi /etc/sysctl.conf 

# Add the following to sysctl.conf:

# Decrease TIME_WAIT seconds
net.ipv4.tcp_fin_timeout = 30

# Recycle and Reuse TIME_WAIT sockets faster
net.ipv4.tcp_tw_recycle = 1

taiju

var partitionIterator = function(array, n, step, pad, is_all, result) {
  if (_.size(array) < n) {
    if (_.isNull(pad) && is_all) return (_.isEmpty(array)) ? result : result.concat([array]);
    else if (!_.isNull(pad) && !is_all) return result.concat([array.concat(_.take(pad, n - _.size(array)))]);
     else return result;
   }
  else return partitionIterator(_.rest(array, step), n, step, pad, is_all, result.concat([_.take(array, n)]));
};

_.mixin({

szimek

This allows you to use the following video streaming services outside of the US from your Mac without having to use a proxy or VPN, so no big bandwidth issues:

• Netflix
• Hulu / HuluPlus
• CBS
• ABC
• MTV
• theWB
• CW TV
• Crackle

jlong

var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";

parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port;     // => "3000"
parser.pathname; // => "/pathname/"
parser.search;   // => "?search=test"
parser.hash;     // => "#hash"
parser.host;     // => "example.com:3000"

dhh

# Bulk API design
#
# resources :posts
class PostsController < ActiveController::Base
  # GET /posts/1,4,50,90
  # post_url([ @post, @post ])
  def show_many
    @posts = Post.find(params[:ids])
  end

josevalim

# In your test_helper.rb
class ActiveRecord::Base
  mattr_accessor :shared_connection
  @@shared_connection = nil

  def self.connection
    @@shared_connection || retrieve_connection
  end
end