For @DoingItWrong.

identify-quiet-followings.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'twitter'
require 'json'
require 'faraday'

TWITTER_USER = "your_username_here"
TIMEOUT = 1 # increment this if you're getting a lot of rate limit errors

# get these from dev.twitter.com
CONSUMER_KEY = "blahblah"
CONSUMER_SECRET = "blahblah"
OAUTH_TOKEN = "blahblah"
OAUTH_TOKEN_SECRET = "blahblah"

Twitter.configure do |config|
  config.consumer_key = CONSUMER_KEY
  config.consumer_secret = CONSUMER_SECRET
  config.oauth_token = OAUTH_TOKEN
  config.oauth_token_secret = OAUTH_TOKEN_SECRET
end

followings = Twitter.friend_ids(TWITTER_USER, {:cursor => -1}) # cursor maybe not necessary? idk

puts "let's begin... #{followings.ids.size} accounts to look at here"

# tip: if you just want to play with this script (and not actually trudge through all of your followings) replace
# followings.ids.map
# with
# followings.ids.sample(10).map

users_and_times = followings.ids.map do |id|
  begin
    sleep TIMEOUT
    name = Twitter.user(id).name
    puts "fetching info for #{name}"
    {:id => id,
      :name => name,
      :username => Twitter.user(id).username,
      :newest_timestamp => Twitter.user_timeline(id).first.created_at}
  rescue Twitter::Error::TooManyRequests => error
    puts "ERROR: too many API requests; pausing #{error.rate_limit.reset_in} seconds"
    sleep error.rate_limit.reset_in
    retry
  end
end

puts "sorting"

users_and_times.sort_by! do |user|
  user[:newest_timestamp]
end

THRESHOLD_IN_DAYS = 7 # <-- here's where you set your threshold
now = Time.now

users_and_times.each do |user|
  diff_in_days = ( (now - user[:newest_timestamp]) / (60*60*24) ).ceil
  if (diff_in_days >= THRESHOLD_IN_DAYS) then
    puts "#{user[:username]} (#{user[:name]}) hasn't tweeted in #{diff_in_days} days"
  end
end