Here’s a neat ruby script to group and count the number of occurrences of lines inside a given file.

count.rb

list = IO.readlines(ARGV[0])
h = Hash.new {|hash, key| hash[key] = 0}
list.each {|item| h[item] += 1}
h = h.sort_by { |k,v| v }.reverse
h.each_with_index do |p,i|
  puts "(#{p[1]}) #{p[0]}"
  if ARGV[1] and ARGV[1].to_i <= i + 1
    break
  end
end

Usage is:

ruby count.rb <file> [show_at_most_n]

If you have a file named “faren.txt” comprised of the following lines:

test
test
awesome
dude
dude
dude
faren
meran

Running the script  with:

ruby count.rb faren.txt

Will yield the following result:

(3) dude
(2) test
(1) awesome
(1) faren
(1) meran

In addition, if you pass the “show_at_most_n” parameter (a number), it will only print that number of results. For example 2 will show the following:

(3) dude
(2) test

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This time i decided to make available online, here.

Have fun

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Here’s a little something i tried yesterday: a ruby script that mixes and matches verbs, nouns, adjectives, and colors to come up with crazy ass lyrics, red hot style. Enjoy

$nouns = IO.readlines('names.txt')
$adjectives = IO.readlines('adjectives.txt')
$verbs = IO.readlines('verbs.txt')
$adjectives << ['red','blue','green','white','black','yellow','brown','gray']
$pronouns = IO.readlines('pronouns.txt')
$adverbs = IO.readlines('adverbs.txt')
$prepositions = IO.readlines('prepositions.txt')

def get_rand(collection)
  sleep rand / 10000
  collection[rand * collection.length.to_i - 1]
end

def preposition_phrase
  "#{get_rand($prepositions).strip} the #{get_rand($nouns).strip}"
end

def adjectivated_subject_phrase
  the_part = "the" if rand.to_f > 0.5
  adjective = get_rand($adjectives).strip if rand.to_f > 0.5
  return "#{the_part} #{adjective} #{get_rand($nouns).strip}" if the_part and adjective
  nil
end

def generate_phrase
  as = adjectivated_subject_phrase
  adjectivated_subject_part = as.nil? ? get_rand($pronouns).strip : as
  preposition_part = rand.to_f > 0.5 ? preposition_phrase : ""
  verb_part = get_rand($verbs).strip
  object_part = rand.to_f > 0.25 ? get_rand($nouns).strip : ""
  the_part = (rand.to_f > 0.5 and object_part != "") ? "the" : ""
  adverb_part = rand.to_f > 0.75 ? get_rand($adverbs).strip : ""

  "#{adjectivated_subject_part} #{preposition_part} #{verb_part} #{the_part} #{object_part} #{adverb_part}".squeeze(" ").strip
end

def generate_lyrics
  result = ""
  (1..5).each do
    first_phrase = generate_phrase
    new_phrase = generate_phrase
    while new_phrase[-2, 2] != first_phrase[-2, 2] or new_phrase.split(" ")[-1] == first_phrase.split(" ")[-1] do
      new_phrase = generate_phrase
    end
    result << "#{first_phrase}\r\n#{new_phrase}\r\n\r\n"
  end
  result
end

puts generate_lyrics

Here are the sources: rhcp_lyrics_v2.tar. As a bonus there is a script to see how many attempts are required to reach the phrase “The quick brown fox”

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Lately i’ve been tinkering around with the idea of recreating my blog in a more handcrafted way (ruby on rails) as opposed to the current implementation using WordPress. Don’t get me wrong WordPress is awesome. It has many years and millions of websites as a testament of it’s awesomeness behind it. But i guess my hacker’s vein popups up every now and then to whisper the reasons why i should have something custom made

The biggest problem with this, is that WP’s interface to create posts is, again, awesome. You can find plugins for pretty much anything, especially to do tasks that are otherwise plain boring, like uploading pictures to your flickr account and instantly have them available in your post for inclusion. I’ve been trying to find something like that for those nice HTML editors out there (like tinyMCE and CKEditor), but so far have had no luck.

Anyone out there knows if something like that exists yet and where can i find it?

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Don’t ask me how the sed magic works, but it does. Taken from here.

Running this:

mysql -u<USER> -p<PASSWORD> <DATABASE> -B -e "select * from videos_video;" | sed 's/\t/","/g;s/^/"/;s/$/"/;s/\n//g'

will produce something like this:

"id","title","url"
"1","video 1","http://youtube(...)"
"2","video 2","http://youtube(...)"
"3","video 3","http://youtube(...)"

Just pipe it to a .csv file and you’re done

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If you are developing in Swing and using hibernate you might – at some point in time – run into this exception:

org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session

What happened, you might ask? Well, turns out that when you close the session that created a given hibernate-managed object, this object becomes “detached” (meaning hibernate no longer has any control over it). So, when you attempt to save or update it in another session, hibernate will complain with that exception, because it can no longer tell which is the “true” version of the object.

The solution(s)? Look inside your code for places where you might be closing the session and take that out. That’s the solution in the case where you are using a long session (one that spans the entirety of the application’s life). In case you really want to close the session, you might consider using the session’s merge() method, which basically merges the fields in both the attached and non-attached instances of the object, and performs an update.

Hope that saves someone half a day of debugging

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Here’s a little script to get the latest earthquakes worldwide (1 hour). Sorry, Ruby purists, for not using RSS 2.0 and hpricot for a cleaner extraction of the coordinates, but my xcode installation is messed up and i can’t build any gems

require 'rss/1.0'
require 'rss/2.0'
require 'rss/atom'
require 'open-uri'
require 'cgi'

source = "http://earthquake.usgs.gov/earthquakes/catalogs/1hour-M1.xml" # url or local
filecontent = "" # raw content of rss feed will be loaded here
open(source) do |s| content = s.read end
rss = RSS::Parser.parse(content, false)
rss.items.each do |item|
  data = item.summary.to_s
  # Extract raw info
  data = data.scan( /alt\=\&quot\;([^>]*)W\&quot\;/).last.first
  # Remove html escaping
  data = CGI.unescapeHTML(data).gsub("°N", "").gsub("°", "")
  # Convert into coords
  lat = data.split(' ')[0]
  lon = data.split(' ')[1]
  # Print it
  print item.updated.content, " ", item.title.content, " ", lat, " ", lon, "\n"
end

Next step: Show this on a map

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Application markets and stores are all the rage these days. Let’s see, there’s the apple store, the android market, Microsoft’s app store, Nokia’s OVI store, and probably a gazillion more. It’s like if you don’t have one, you don’t really exist.

Well, now the eclipse IDE has got one as well. You can get plugins and the likes there, in which seems to be an easier way to find components to install. Gone are the times when you had to copy and paste endless amounts of update sites to install your favorite plugins. Or so i hope

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As a part of my Ruby learning process, i decided to write something to retrieve the full list of brands that Coca Cola currently owns from their website. The list is split across multiple pages, but with some Ruby magic and a nice library called Hpricot to traverse the HTML it was 5 minutes of work

Here’s the script:

require 'open-uri'
require 'rubygems'
require 'hpricot'
require 'pp'

my_file = File.new("cola.txt", 'w')

('a'..'z').each do |letter|
open("http://www.thecoca-colacompany.com/brands/product_list_#{letter}.html") do |f|

    # meta info
    #pp f.meta

    #pp 'Content-Type: ' + f.content_type
    #pp 'Last modified: ' + f.last_modified.to_s

    doc = Hpricot.XML(f)
    div = doc/"#products_link_list"
    (div/:ul).each do |ul|
      (ul/:li).each do |li|
        if (li/:a).first
          my_file.puts((li/:a).first.inner_html)
        else
          my_file.puts li.inner_html.to_s
        end
      end
    end

  end
end

And here’s the full list of brands that belong to Coca Cola:

A&W
Acueducto
Ades
Agua Manantial
Ali
Alive
Alpina
Ambasa
Ameyal
Amorino
Andina/Andina light
Andina Fortified
Andina Fresh
Andina Frut
Andina Nectar
Apollinaris
Aqua+
Aquabona
Aquactivede by Aquarius
Aquana
Aquarius
Aquarius Active Diet
BACARDI Mixers*
BACARDI Premium Mixers*
Bajoru Gira
Bankia
Barq’s
Barrelitos
BEAT
Beautia
Bebere
Benedictino
Beverly
Bevi
Bibo
Big Crush
Big Tai
Bimbo
Bimbo Break
Biotime
Bird’s Nest*
Bistra
Bistrone
Bjare
Blackfire
Boco
Bogadera
Bom Bit Maesil
BonAqua/BonAqa
Borneo
Botaniq 1QQ
Botany
BPM
Brazzi
Bright & Early
Brisa Agua Pura
Brisa by Bonaqua
Brisa con un Toque de Gas
Brisa Spa
Bu
Bubbly
burn
buzz
CAFÉ ZU
caffeine-free Barq’s
caffeine-free Coca-Cola
caffeine-free Diet Coke/caffeine-free Coca-Cola light
Calypso
Canada Dry
Canning’s
Cappy
Caprice
Caribou Coffee*
Carioca
Cascal
Carver’s
Cepita
Chaqwa
Charrua
Chaudfontaine
Cheers
cherry Coke
cherry Coke zero
Chinotto
Chinotto light
Ciel
CITRA
Club
Coca-Cola
Coca-Cola Black Cherry Vanilla
Coca-Cola Blāk
Coca-Cola C2
Coca-Cola Citra
Coca-Cola light/Diet Coke
Coca-Cola with Lemon
Coca-Cola with Lime
Coca-Cola with Raspberry
Coca-Cola Zero
Cocoteen
Cola Guaraná Jesus
Country Club
Cresta
Cristal
Crush
Crusta
Crystal
Damla Minera
DANNON*
DASANI
DASANI Active
DASANI Balance
DASANI Flavors
DASANI Nutriwater
DASANI Plus
Del Valle
Del Valle Frut
Del Valle Frutsi
Del Valle Frutsi Desarrollo
Del Valle Kapo
Del Valle Mais light
Del Valle light
Delaware Punch
diet A&W
diet Andina Frut/Andina Frut light
diet Andina Nectar/Andina Nectar light
diet Barq’s
diet Canada Dry
Diet cherry Coke
Diet Coke/Coca-Cola light
Diet Coke Black Cherry Vanilla
Diet Coke Citra/Coca-Cola light Citra
Diet Coke Plus
Diet Coke Sweetened with Splenda®
Diet Coke with Lemon/Coca-Cola light with Lemon
Diet Coke with Lime/Coca-Cola light with Lime
Diet Coke with Raspberry
Diet Crush
diet Dr Pepper/Dr Pepper Zero
diet Fanta/Fanta light/Fanta Zero/Fanta Free
diet Freskyta
diet INCA KOLA
diet Kia Ora
diet Krest
diet Lift/Lift light
diet Lilt/Lilt Zero
diet Master Pour
diet Mello Yello
diet Mezzo Mix
diet Minute Maid Soft Drink
diet Nestea/Nestea light*
diet Northern Neck
diet Oasis
diet Quatro/Quatro light
diet Schweppes
diet Seagram’s*
diet Sprite/Sprite light/diet Sprite Zero/Sprite Zero
diet Squirt
diet Tai/Tai light
diet Vanilla Coke
Disney Xtreme Cooler*
Diva
Dobriy
Dogadan
Dorna
Dr Pepper
E2
Earth and Sky
Eight O’Clock
El Rayek
Enviga*
Epika
Escuis
Eva Water
Fanta
Fanta Verdia
Far Coast
Felicia
Finley
Fioravanti
Fire
Five Alive
Flavor Rage
Fontana
Fresca
Fresca 1
Frescolita
Freskyta
Fresquinha
Fress
Frestea*
Friolin
Frisco
Frugos
Frugos Fresh
Fruit Solutions
Fruitia
Fruitier
Fruitopia
Fruktime
Frutina
Frutonic
Full Throttle
Full Throttle Blue Demon
Full Throttle Sugar Free
Funchum Orange Drink
Furusato Dayori
FUZE Healthy Infusions
GEORGIA
GEORGIA Club
GEORGIA Gold
GEORGIA Grande
Gini
Girios Gira
glacéau smartwater
glacéau vitaminwater
glacéau vitaminwater zero
Gladiator
Godiva* Belgian Blends
Gold Peak
Gold Spot
Golden Crush
Goombay Punch
Goulburn Valley
Grapette
Groovy
Guaraná Kuat light
Guaraná Kuat Zero
Hajime
Haru No Mint Shukan
Hawai
Healthworks
Heppinger
Hero
Hi Spot
Hi-C
Hires
Hit
Horizon
Hot Point
Huang
Ice Dew
Ice Dew 3+
Ice Tea Leao
illy issimo*
INCA KOLA
Ipsei
Izvorul Alb
Jaz Cola
Jericho
Jet Tonic
Jolly Juice
Joy
Joya
Juan Valdez
Juices To Go
Just Juice
Kani
Kapo
Kapo Zero
Karada Meguri-Cha
Kashaya Tea
Keloco
Keri
Kia Ora
Kildevaeld
Kilimanjaro
Kin
Kinley
Kist
Kiwi Blue
Kochakaden
Kola Inglesa
Koumisoukai
Krest
Kristal
Kropla Beskidu
Krushka & Bochka
Kuat
Kuat Guaraná
Kuat light
Kuli
Kyun
La Jolla
La Vuelta
Lanitis
Lanitis Extra
Lanitis Filaraki
Leao Green Tea
Leao Guaraná Power
Leao Iced Tea
Less Is More, Kinley
Lift
Lift Plus
Lift Plus light
Lilia
Lilt
Limca
Limelite
Limonade
Linnuse
Lion
Love Body
Maaza
Mad River
Malvern
Manantial
Mare Rosso
Marocha
Master Chill
Master Pour
Matte Leao
Matusov Pramen
Mazoe
Mello
Mello Yello
Mer
Mezzo
Mezzo Mix
Miami
Mickey*
Migoro-Nomigoro
Minaqua
Mineragua
Minute Maid
Minute Maid Active
Minute Maid Antiox
Minute Maid Deli
Minute Maid Duofrutas
Minute Maid Fruit Plus
Minute Maid Heart Wise
Minute Maid Just 10
Minute Maid Light
Minute Maid Mais
Minute Maid Nutri+
Minute Maid Premium
Minute Maid Soft Drink
Minute Maid Splash
Mireille
Mission
Mone
Montefiore
Mori No Mizudayori
Morning Deli
Mother
Mr. Pibb
multiVita
Nada
Nagomi
Nalu
Namthip
Nanairo Acha
Naturaqua
Natures Own*
Nectarin
Nestea*
Nestea Choglit*
Nestea COOL*
Nestea Viteao*
Nevada
Neverfail
Next
Nico
Nordic Mist
Northern Neck
NOS
Nos Entendemos
Oasis
Odwalla
Olimpija
Orchy
Paani Treated Water
Pacific Orchard
Pampa
Paradise Sun
Parle
Pasazade
Pearona
Peats Ridge Springs
Pibb Xtra
Pibb Zero
Piko
Pilskania
Planet Java*
Play Energy Drink
Pocket Dr
Poiana Negri
Polar Brew
Poms
Ponkana
Pop
Portello
POWERADE
POWERADE Advance
POWERADE alive
POWERADE aqua+
POWERADE Balance
POWERADE light
POWERADE OPTION
POWERADE Zero
Powerplay
Premio
Presta
Presta light
Pulp Orange
Pulpy
Pump
Pumped Enhanced Hydration
Pura Sol
Qoo
Quatro
Quwat Jabal
R’fresh
Ramlosa
Real
Real Leaf
Real Gold
Rehab
Relentless
Rich
Richy
Riwa
Roemerquelle
Rosa
Rosalta
Roses
Royal Tru
Royal Tru light
Safety First
Safia
Sahtain
Samantha
Samurai
San Luis
Sarsi
Saryusaisai
Schuss
Schweppes
Schweppes Abbey Well
Seagram’s*
Seltz
Sensation
Sensun Gazoz
SENZAO
Shandy
Shangri-La
ShiZen*
Shock
Signature
Sim
Simba
Simply Apple
Simply Grapefruit
Simply Lemonade
Simply Limeade
Simply Orange
Smart
Sobo
Sokenbicha
Solo
Sonfil
Soonsoo 100
Southern Sun
Sparkle
Sparletta
Sparletta Iron Brew
Splash
Splice
Sport
Sprite
Sprite 3G
Sprite Duo
Sprite Flavors
Sprite Ice
Sprite Remix
Sprite Zero/diet Sprite/Sprite light /diet Sprite Zero
Spur
Squirt
Stoney Gold Ginger Beer
Sucos Mais
Sunfill
SURGE
Svali
Sveva
Sweecha
TaB
TaB energy
TaB X-Tra
TADAS
Tai
The Spirit of Georgia
The Wellness From Coca-Cola
Thextons
Thums Up
Tian Yu Di/Heaven and Earth
Tiky
Toppur
Top’s
Tropi
Tropical
Turkuaz
Ultra
Urge
Urun
V Florida 7
Valle Frut
Valpre
Valser
Valser Viva
Vanilla Coke
Vanilla Coke Zero
VAULT
VAULT Zero
Vegitabeta
VICA
Vio
Vita
Vital
Wilkins
Wink
Winnie the Pooh*
Yangguang
Yangguang Juicy T
Yo Conozco a Hugo
Yoli
Youki
Yuan Ye

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One of the biggest pains of any developer is maintaing the source code. Especially if you – like me – have a gazillion pet projects that need to be updated whenever you come up with “cool idea #20000″ for one of them.

Version control systems like Mercurial are awesome, but they are only part of the equation; there’s still the time consuming process of deploying the changes to “production”. So i wonder if it would be a good idea to have a Mercurial repository sitting on a dropbox account and develop directly there. This way any changes to the source code would be instantly reflected on production.

I am aware that this is unthinkable for serious projects (the kind you get paid to do), but it can probably work for fun pet projects.

Do you have any experience with something like that? Share your thoughts, if you have any

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