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Since 2009. 7. 16.

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An object represents an individual, identifiable item, unit, or entity, either real or abstract, with a well-defined role in the problem domain.

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    Agile2009¿¡¼­ Rebecca. Skill For Agile Designers¼½¼Ç.

Inside-Out¹æ½ÄÀÇ TDD´Â design driven¹æ½ÄÀÌ ¾Æ´Ï¶ó ÀÌ¹Ì Á¸ÀçÇÏ´Â designÀÇ °ËÁõÇÏ´Â ½ÄÀÌ´Ù.
Outside-In¹æ½ÄÀÇ °æ¿ì ¹®Á¦¸¦ defineÇÏ°í ³­ ÈÄ designÀ» ´Ù°¢µµ·Î Àû¿ëÇϰí testÇØ º¼ ¼ö ÀÖ´Ù.
Âü°í : [WWW]Unit Tests Validates Micro-Design

  1. class ¼ö
  2. subsystem ¼ö
  3. class´ç contract ¼ö
  4. abstract class ¼ö

C¾ð¾î¿¡¼­ °´Ã¼ÁöÇâÀ¸·Î ±¸ÇöÇϱâ À§Çؼ­´Â °¡Àå Áß¿äÇÑ ±â¼ú Áß¿¡ Çϳª·Î ÇÔ¼ö Æ÷ÀÎÅ͸¦ »Ì´Â´Ù. ÇÏÁö¸¸ ´ëºÎºÐÀÇ °³¹ßÀÚµéÀÌ ÇÔ¼ö Æ÷ÀÎÅ͸¦ »ç¿ëÇϱ⸦ ²¨¸°´Ù. ³ªµµ °³¹ßÇÒ¶§ ÇÔ¼ö Æ÷ÀÎÅ͸¦ ÃÖ´ëÇÑ ¹èÁ¦Çß´Ù.
±×´ç½Ã¸¦ »ý°¢ÇØ º¸¸é ÇÔ¼ö Æ÷ÀÎÅÍ ±¸ÇöÀ» ¹Ý´ëÇß´ø ÀÌÀ¯´Â ÃæºÐÈ÷ ÀÖ¾ú´Ù.
switch/case·Î º¸´Â °ÍÀÌ ´õ Á÷°üÀûÀÌ´õ¶ó. ´«À¸·Î µð¹ö±ëÀÌ µÇ´õ¶ó. switch ¿¡ break point¸¦ °É¸é ÇöÀç »óÅ¿¡ µû¸¥ µð¹ö±ëÀÌ ½±´õ¶ó. null Æ÷ÀÎÅÍ¿Í °°Àº °æ¿ì error󸮰¡ ±ÍÂú´õ¶ó.
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C¾ð¾î¿¡¼­ °´Ã¼ÁöÇâÀ¸·Î ±¸ÇöÇϱâ À§Çؼ­´Â Á¤ÇüÈ­µÈ ¹æ¹ýÀÌ Á¦°øµÇ¾î¾ß ÇÑ´Ù. ±¸Á¶ÀûÀ¸·Î ¸íÈ®Çϰí naming°ú °°Àº ±ÔÄ¢µéÀÌ Ã¶ÀúÈ÷ ÁöÄÑÁø´Ù¸é ½±°Ô µµÀÔÀÌ °¡´ÉÇϸ®¶ó´Â »ý°¢ÇÑ´Ù.

2009 ACM Turing Award
Barbara Liskov
http://www.infoq.com/presentations/liskov-power-of-abstraction

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