ruby, cloud, nosql, agile, lean, everything and nothing

Welcome to my space. In this zone, I’m right and you’re wrong.I can say whatever I want and you will not be offended :)

This is my free zone, my unfolding space. I write about whatever interests me and sometimes I just like to share something I learned or discovered. The posts are mostly english, but some are in Norwegian when that’s natural. Any feedback is welcome!

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Rubykurs i Norge – Ruby er entreprenørspråket!

Ruby er entreprenørspråket, team på 1-3 personer gründer firma og produkter på rekordtid. Med Ruby optimerer du over utviklingstid og -ressurser. Med Rails bygger du fullverdige webapplikasjoner i en fei og med skyen er du rede til å ta enorme mengder trafikk, fra start. Du deployer først gratis rubyserver på Heroku, beveger deg så ut derfra ettersom suksessen øker, til Rackspace, Engine Yard, Amazon EC2 eller egen hardware-park. Continue reading

Posted in personal, ruby, rails | Tagged , , , , , , | 2 Comments

2011 – informasjonens og rettferdighetens år!

Dette er et dypere og personlig innlegg, svært ulikt min vanlige programmeringsblogg.

Folkeopprøret for rettferdighet i Tunisia hadde en enorm smitteeffekt; Egypt, Tunisia, Algeria, Libya, Syria, Jemen,… og nå Russland. og kina?…

Det begynner endelig å gå opp for meg hvor stort 2011 har vært… så langt det er mulig for en nordmann. Ja, for hvilke knagger har jeg å henge disse inntrykkene på?

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Pros and cons: In-House Servers vs Cloud Computing

Excerpt : Why and when In-house, Cloud (amazon aws, rackspace, heroku) ?  Here I am presenting a thorough ‘pros and cons list’ to help people understand the differneces, strenghts and weaknesses.

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Posted in agile, smidig, ruby, rails, cloud computing | Tagged , , , , , , , , , , | Leave a comment

My list of what to take from GOGARUCO

Hi all! I attended one of the awesomestest conferences ever, the gogaruco in San Francisco. Yes, test was a biggie, as always (if you don’t write tests stay far away from my code) and as we get better and more advanced, we learn to treat our tests as first class citizens of the code. We run them more often, keep them KISS, SRP and DRY, while striving to write them even better. So taking it a step further, as Corey Haines does, he shows us how to make our tests run faster. Treat Rails like any 3rd party dependency, stub or mock yourself from it and make integration tests for tying it all together.

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Kontinuerlige leveranser – noen enkle spørsmål

Dette er en kort oppfølging til mitt mer omfattende innlegg om De kontinuerlige, (juni 2010). Kontinuerlige leveranser (kontinuerlig prodsetting/Continuous Deployment) er selve kjernen i kontinuerlige prosesser (slik jeg ser på smidige metoder). De er som den en ringen som binder dem alle sammen – unntatt den delen med ondskap.

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Posted in ruby | 3 Comments

Intervju av intervjueren i mineverktøy.no – Thomas Kjeldahl Nilsson

Jeg har intervjuet intervjueren og latt ham svare på sine egne spørsmål. Dette er spørsmålene jeg stilte ham:

Thomas Kjeldahl Nilsson

Thomas Kjeldahl Nilsson

Hva er mineverktoy.no?

Hvorfor startet du mineverktoy.no?

Hvordan ser mineverktoy.no ut om ett år (mai 2012)?

Hva vil du svare på dine egne spørsmål?

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Posted in agile, Java, personal, ruby | Tagged , | Leave a comment

Ruby – Secure staging environment of your public app from users and bots

Context: App with public access, but you would like to prevent public access to staging (avoid google indexing and confused users).

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Posted in rails, ruby | Tagged , , , , , , | 3 Comments

Lean – et minisammendrag fra foredrag

Lean er et utrolig stort tema, med et kraftig og viktig budskap! Her kommer et A4-ark jeg leverte ut i etterkant av mitt foredrag om lean. Dette er et subsett av idéene i lean, et godt et, samt noe snadder av sitater:

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Posted in methodology, smidig | Tagged , , | Leave a comment

Spawning Multiple Threads at Heroku Using Parallel

Figure out the whys yourself. Here’s the how!

#lib/tasks/paralleltest.rb

# Q: Does spawning threads at heroku work?
task :paralleltest => :environment do
  res = "Who finished first? "
  Parallel.map 1..20, :in_threads => 4 do |nr|
    5.times { sleep rand; print "'#{nr}' " }
    puts "done with #{nr} "
    res += "#{nr} "
  end
  puts res
end

I’ve got the question in the rake task ” Q: Does spawning threads at heroku work? “. Well this is what running the rake task at heroku answered me

~/dev/app(master) $ heroku rake paralleltest --app myapp
(in /disk1/home/slugs/182581_156369f_19f1-5cf8dcaa-fc4b-4b21-a5e7-6fd85fad3e25/mnt)
'2' '4' '2' '3' '2' '1' '3' '4' '2' '1' '4' '3' '4' '4' done with 4 
'2' done with 2 
'1' '3' '5' '6' '3' done with 3 
'1' '7' '5' '6' '7' '1' done with 1 
'7' '6' '5' '6' '8' '7' '6' done with 6 
'5' '7' done with 7 
'10' '9' '8' '9' '5' done with 5 
'8' '10' '11' '8' '9' '8' done with 8 
'11' '10' '9' '12' '11' '10' '11' '9' done with 9 
'10' done with 10 
'11' done with 11 
'12' '14' '13' '13' '14' '13' '12' '15' '12' '15' '13' '15' '12' done with 12 
'14' '14' '16' '15' '14' done with 14 
'16' '13' done with 13 
'16' '17' '17' '18' '18' '16' '17' '16' done with 16 
'15' done with 15 
'19' '17' '19' '18' '17' done with 17 
'20' '20' '19' '19' '20' '20' '20' done with 20 
'18' '19' done with 19 
'18' done with 18 
Who finished first? 4 2 3 1 6 7 5 8 9 10 11 12 14 13 16 15 17 20 19 18 

I ran 4 threads on a 1 dyno app, using the parallel gem. The rand-function returns a number between 0 and 1, coincidences making ’4′, ’2′ and ’3′ finish ahead of ’1′. This is awesome and very useful. I love programming ruby!

Posted in rails, ruby | Tagged , , , , | 2 Comments