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Coderetreat


Lauantaina 8.12 Aki Salmi piti oikein miellyttävän koodaustapahtuman Turun ICT talossa. Coderetreatissa on tarkoituksena parantaa koodauksen perustaitoja ja kysenalaistaa pinttyneitä tapoja.

Koodausongelmana oli mallintaa Conwayn Life-peli. Pelin säännöt ovat yksinkertaistettuna seuraavat (Wikipedia lainaus)

  1. Solu muuttuu eläväksi, jos sen naapureista tasan kolme on eläviä.
  2. Solu pysyy elävänä, jos sen naapureista tasan 2 tai 3 on eläviä. Muuten solu kuolee.

Koodia kirjoitetaan aina 45 minuuttia kerralaan, ja tämän jälkeen pidetään 15 minuutin jälkipalaveri. Jokaisessa sessiossa on jonkinlainen rajoitus, esim. ei ehdollisia ilmauksia. Koodaaminen suoritetaan pareittan, jotka vaihdetaan joka session jälkeen.

En ole tehnyt juurikaan parikoodausta ennen, mutta opin siihen uuden hauskan tavan. TDD Ping Pongissa ensimmäinen parista kirjoittaa testin, joka ei mene läpi. Toinen parista kirjoittaa testin läpäisevän koodin ja puolestaan kirjoittaa uuden testin, joka failaa. Tällä tavoin molemmat pysyvät koko ajan mukana ajatuksessa ja parin vaihtaminen on luonnollista. Menetelmä pakottaa myös ääneen ajatteluun.

Harjoituksissa oli tärkeää parin välinen kommunikaatio. Aki sanoikin, että hänen mielestään koodaajan tärkein ominaisuus on hyvä kommunikaatiokyky. Oli mielenkiintoista nähdä, miten kokeneemmat koodaajat lähtevät purkamaan uutta ongelmaa ja miten nämä ilmaisevat ajatuksiaan. Helpottavaa oli kuitenkin huomata, että kaikki ei tullut luonnostaan myöskään vanhoille parroille.

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