gbuesing

UPDATE a fork of this gist has been used as a starting point for a community-maintained "awesome" list: machine-learning-with-ruby Please look here for the most up-to-date info!

Resources for Machine Learning in Ruby

Gems

• liblinear-ruby: Ruby interface to LIBLINEAR using SWIG

dhh

# Original Rails controller and action
class EmployeesController < ApplicationController
  def create
    @employee = Employee.new(employee_params)
    
    if @employee.save
      redirect_to @employee, notice: "Employee #{@employee.name} created"
    else
      render :new
    end

dhh

# MODEL

class Case < ActiveRecord::Base
  include Eventable
  
  has_many :tasks

  concerning :Assignment do
    def assign_to(new_owner:, details:)
      transaction do

dhh

class GroupersController < ApplicationController::Base
  def create
    @grouper = Grouper.new(leader: current_member)

    if @grouper.save
      ConfirmedGrouperEmails.new(@grouper).deliver
      AssignBarForGrouper.enqueue(@grouper.id)

      redirect_to home_path
    else

georgepsarakis

#!/usr/bin/env python
import os
import itertools
import multiprocessing as mp
from math import ceil
from types import GeneratorType as generator
from functools import partial
from time import time

keichan34

module ActiveRecordMarshalable
  def marshal_dump
    [attributes, self.association_cache, instance_variable_get(:@new_record)]
  end

  def marshal_load data
    send :initialize, data[0]
    instance_variable_set :@association_cache, data[1]
    instance_variable_set :@new_record, data[2]
  end

nihilismus

chruby + ruby-build / mksh

1. Install chruby and ruby-build with git. I keep their repo at ~/.chrb, their installation inside ~/local and my rubies at ~/.chrb/rubies.
2. Copy this in your ~/.mkshrc file

# chruby + ruby-build
chrb() {
    source ~/local/share/chruby/chruby.sh
    unset RUBIES
    RUBIES=$(ls -d ~/.chrb/rubies/* 2> /dev/null)

adamwiggins

Make it real

Ideas are cheap. Make a prototype, sketch a CLI session, draw a wireframe. Discuss around concrete examples, not hand-waving abstractions. Don't say you did something, provide a URL that proves it.

Ship it

Nothing is real until it's being used by a real user. This doesn't mean you make a prototype in the morning and blog about it in the evening. It means you find one person you believe your product will help and try to get them to use it.

Do it with style

cec

namespace :deploy do
  # Ask whether to reindex before restarting Passenger
  task :restart, :roles => :app, :except => {:no_release => true} do
    solr.reindex if 'y' == Capistrano::CLI.ui.ask("\n\n Should I reindex all models? (anything but y will cancel)")
    run "touch #{File.join(current_path, 'tmp', 'restart.txt')}"
  end

  desc 'create shared data and pid dirs for Solr'
  task :setup_solr_shared_dirs do
    # conf dir is not shared as different versions need different configs

matsadler

Ruby 2.0.0 in detail

Keyword arguments

def wrap(string, before: "<", after: ">")
  "#{before}#{string}#{after}" # no need to retrieve options from a hash
end

# optional