pduey

class Array

  # Converts a one dimensional array into a table with the given number of columns. Optionally transposes 
  # the result. Suited for output to an HTML table you want sorted vertically instead of horizontally. 
  # Pads correctly, i.e., each row/column has at most one empty cell. num_columns is the desired number 
  # of columns in the result, regardless if the table is transposed.
  def tabulate(num_columns, transpose=true)
    if transpose
      num_rows = num_columns
      num_columns = ((self.size - 1) / num_columns) + 1

pduey

Architecture: Rails 3.2, Solr 1.4 with sunspot_solr gem, Apache HTTP server as reverse proxy to 
Rails app, Jquery UI

Note: I don't care about the distinction between autocomplete and autosuggest. I am implementing what some 
people call autosuggest, and I'm calling it autocomplete.


Given the above existing architecture, I want to add an autocomplete field into my app for a single 
attribute on a single model. It needs to be fast and secure (duh). The search target field could have 
white space and the search input should allow it, e.g., if I search with "iker's gui" it should return 

pduey

// pduey: a couple of public and private functions to add or remove a query string parameter + value pair.
//
// I like this implementation because it transforms the query string into a coherent hash with unique keys
// and an Array for the values, so it handles repeated query string parameter names, which are meant to be
// interpreted as Arrays, yo. The "private" functions could, of course, be handy for other uses.
//
// The function names include "search" because they are derived from window.location.search.
// Ideally, I'd attach these to the window object, as in, window.location.prototype.
//

pduey

# I needed to overwrite (not override) the Savon::Client.request method in my development 
# environment only, and only for 1 type of request that happens to hit a host I can access
# only in production. For all other requests, it should invoke the original Savon::Client.request.
# I found it a little tricky since it takes optional args and a block. Here's what worked, which
# I learned from these two stackoverflow answers
# http://stackoverflow.com/questions/4470108/when-monkey-patching-a-method-can-you-call-the-overridden-method-from-the-new-i
# http://stackoverflow.com/questions/89650/how-do-you-pass-arguments-to-define-method
# It's maybe similar to how rspec implements the stub method?

Savon::Client.class_eval do

pduey

#!/usr/bin/env ruby
# Save as file, e.g., luhn_validator.rb, make executable, then: ./luhn_validator.rb 'number'

DIGIT_REDUX = [0, 2, 4, 6, 8, 1, 3, 5, 7, 9] # simple lookup instead of doubling and summing if > 9

def valid_luhn_number?(number)
  digits = number.to_s.split(//).map{|d| d.to_i}
  digits.reverse!.each_index{|i| digits[i] = DIGIT_REDUX[digits[i]] if i.odd?}.reduce(:+) % 10 == 0
end

pduey

# In order to use Rails Active Storage Direct Upload to a cloud service, e.g., using Rails 
# Action Text rich text editor image upload button, the cloud service will need CORS
# configured. The GCS CORS doc at https://cloud.google.com/storage/docs/configuring-cors
# describes 3 ways of doing it. I wanted to use the Ruby code method, since I already had
# GCS configured for my app and could avoid configuring some other utility. The key was
# getting a handle on a client from my rails app. So, assuming you have already uploaded
# something via your app (not via direct upload):
client = ActiveStorage::Blob.last.service.send :client
bucket = client.buckets.first
bucket.update do |bucket|