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Do It Again To Learn

같은 것을 λ‹€μ‹œ ν•΄λ³΄λŠ” κ²ƒμ—μ„œ μš°λ¦¬λŠ” μ–Όλ§ˆλ‚˜ λ§Žμ€ 것을 배울 수 μžˆλŠ”κ°€.

μ™œ λ™μΌν•œ 문제λ₯Ό μ—¬λŸ¬λ²ˆ ν’€κ³ , μ™œ 같은 λ‚΄μš©μ˜ μ„Έλ―Έλ‚˜μ— λ˜λ‹€μ‹œ 참석을 ν•˜κ³ , 같은 ν”„λ‘œκ·Έλž¨μ„ κ±°λ“­ μž‘μ„±ν• κΉŒμš”?

훨씬 더 많이 배울 수 있기 λ•Œλ¬Έμž…λ‹ˆλ‹€. ν™”μˆ  κ΅μœ‘μ—μ„œλŠ” 같은 μ£Όμ œμ— λŒ€ν•΄ ν•œλ²ˆ 말해본 연사와 λ‘λ²ˆ 말해본 μ—°μ‚¬μ—λŠ” μ²œμ§€μ°¨μ΄κ°€ μžˆλ‹€κ³  λ§ν•©λ‹ˆλ‹€. 같은 일에 λŒ€ν•΄ λ‘λ²ˆμ˜ κΈ°νšŒκ°€ 주어지면 λ‘λ²ˆμ§Έμ—λŠ” μ²«λ²ˆμ§Έλ³΄λ‹€ 잘 ν•  κΈ°νšŒκ°€ μžˆμŠ΅λ‹ˆλ‹€. κ²Œλ‹€κ°€ 첫번째 κ²½ν—˜ν–ˆλ˜ 것을 "터널을 λ²—μ–΄λ‚˜μ„œ" λ‹€μ†Œ 객관적인 μž…μž₯μ—μ„œ λ³Ό 수 있게 λ©λ‹ˆλ‹€. μ™œ μžμ‹ μ΄ μ €λ²ˆμ— 이걸 잘 λͺ»ν–ˆκ³ , μ €κ±Έ μž˜ν–ˆλŠ”μ§€ μ•Œκ²Œ 되고, μ–΄λ–»κ²Œ ν•˜λ©΄ κ·Έκ±Έ 더 μž˜ν•  수 μžˆμ„λŸ°μ§€ κΉ¨λ‹«κ²Œ λ©λ‹ˆλ‹€. μ €λŠ” λ˜‘κ°™μ€ 문제λ₯Ό μ—¬λŸ¬λ²ˆ 풀더라도 맀번 μ‘°κΈˆμ”© λ‹€λ₯Έ 해닡을 μ–»μŠ΅λ‹ˆλ‹€. κ·ΈλŸ¬λ©΄μ„œ μ—„μ²­λ‚˜κ²Œ λ§Žμ€ 것을 λ°°μ›λ‹ˆλ‹€. "λΉ„μŠ·ν•œ λ¬Έμ œλ“€"을 λͺ¨λ‘ ν’€ λŠ₯λ ₯이 μƒκΈ°κ²Œ λ©λ‹ˆλ‹€.

"We do it again -- to do it, to do it well, and to do it better." --JuNe (play on Whitehead's quote)
μ œκ°€ 개인적으둜 μ‘΄κ²½ν•˜λŠ” μ „μ‚°ν•™μž Robert W. FloydλŠ” 1978년도 νŠœλ§μƒ κ°•μ—° The Paradigms of Programming(일독을 μ΄ˆκ°•λ ₯ μΆ”μ²œ)μ—μ„œ λ‹€μŒκ³Ό 같은 말을 ν•©λ‹ˆλ‹€. --κΉ€μ°½μ€€
Seminar:TheParadigmsOfProgramming DeadLink? - μ €λŠ” μž˜λ‚˜μ˜€λŠ”λ°μš”. λ„€μž„μ„œλ²„ 섀정이 잘λͺ»λœκ±΄ μ•„λ‹ˆμ‹ μ§€.. - μ•„λ¬΄κ°œ
Seminar에 λ‘œκ·ΈμΈμ„ μ•ˆ ν•΄μ„œ μ—¬κΈ°λ‹€ DeadLink 딱지λ₯Ό λ‹¬μ•˜μŠ΅λ‹ˆλ‹€. μ•ˆμ— λ‚΄μš©λ¬Όλ„ λ°›μ•„μ§€μ‹œλ‚˜μš”? --Leonardong
κ·ΈλŸ¬λ„€μš”. λ³΄κ³ μ‹ΆμœΌμ‹  뢄이 κ³„μ‹œλ©΄ μž„μΈνƒμ—κ²Œ 말씀해 μ£Όμ„Έμš”.

In my own experience of designing difficult algorithms, I find a certain technique most helpfult in expanding my own capabilities. After solving a challenging problem, I solve it again from scratch, retracing only the insight of the earlier solution. I repeat this until the solution is as clear and direct as I can hope for. Then I look for a general rule for attacking similar problems, that would have led me to approach the given problem in the most efficient way the first time. Often, such a rule is of permanent value. ...... The rules of Fortran can be learned within a few hours; the associated paradigms take much longer, both to learn and to unlearn. --Robert W. Floyd
George PolyaλŠ” μžμ‹ μ˜ μ±… NoSmok:HowToSolveItμ—μ„œ 이런 말을 ν•©λ‹ˆλ‹€:

Even fairly good students, when they have obtained the solution of the problem and written down neatly the argument, shut their books and look for something else. Doing so, they miss an important and instructive phase of the work. ... A good teacher should understand and impress on his students the view that no problem whatever is completely exhausted. --George Polya
μ €λŠ” ACM의 ICPC 문제 쀑에 μ–΄λ–€ λ†ˆμ„ μ΄μ œκΉŒμ§€ μ—΄ λ²ˆλ„ λ„˜κ²Œ ν’€μ—ˆμŠ΅λ‹ˆλ‹€. λŒ€λΆ€λΆ„ PairProgrammingμ΄λ‚˜ μ„Έλ―Έλ‚˜μ—μ„œ ν”„λ‘œκ·Έλž˜λ° μ‹œμ—°μ„ ν–ˆλ˜ 것인데, 제 μ„Έλ―Έλ‚˜μ— μ—¬λŸ¬λ²ˆ μ°Έμ„ν•œ μΉœκ΅¬κ°€ λ¬Όμ—ˆμŠ΅λ‹ˆλ‹€. "μ‹ κΈ°ν•΄μš”. μ°½μ€€μ”¨λŠ” κ·Έ 문제λ₯Ό ν’€ λ•Œλ§ˆλ‹€ λ‹€λ₯Έ ν”„λ‘œκ·Έλž¨μ„ μ§œλŠ” 것 κ°™μ•„μš”. ν˜Ήμ‹œ μ€€λΉ„λ₯Ό μ•ˆν•΄μ™€μ„œ κ·Έλƒ₯ λ‚΄ν‚€λŠ” λŒ€λ‘œ ν•˜λŠ” 건 μ•„λ‹ˆμ£ ? :)" μ €λŠ” 카였슀 μ‹œμŠ€ν…œκ³Ό λΉ„μŠ·ν•˜κ²Œ 초기치 민감도가 ν”„λ‘œκ·Έλž˜λ°μ—λ„ μž‘μš©ν•˜λŠ” 것 κ°™λ‹€λŠ” λŒ€λ‹΅μ„ ν•΄μ€¬μŠ΅λ‹ˆλ‹€. μ € 슀슀둜 λ‹€λ₯Έ 해법을 μ‹œλ„ν•˜κ³  싢은 마음이 있으면 κ·Έλ ‡κ²Œ 좜발이 쑰금 λ‹€λ₯΄κ³ , 또 κ±°κΈ°μ„œ λ‚˜μ˜€λŠ” 진행 λ°©ν–₯도 λ‹€λ₯΄κ²Œ λ©λ‹ˆλ‹€. 그런데 μ€‘μš”ν•œ 것은 μ΄λ ‡κ²Œ 같은 문제λ₯Ό 맀번 λ‹€λ₯΄κ²Œ ν‘ΈλŠ” λ°μ—μ„œ λ°°μš°λŠ” 것이 μ—„μ²­λ‚˜κ²Œ λ§Žλ‹€λŠ” μ μž…λ‹ˆλ‹€. μ €λŠ” 맀번, 전보닀 κ°œμ„ ν•  것을 μ°Ύμ•„ λ‚΄κ²Œ 되고, 또 μƒˆλ‘œμš΄ 것을 λ°°μ›λ‹ˆλ‹€. 마치 마λ₯΄μ§€ μ•ŠλŠ” μƒ˜λ¬Όμ²˜λŸΌ 계속 생각할 거리λ₯Ό μ€€λ‹€λŠ” 점이 μ°Έ λ†€λžμŠ΅λ‹ˆλ‹€. --JuNe
TDD λ₯Ό μ—°μŠ΅ν•˜κ³ , μ›Œν¬μƒ΅ μ€€λΉ„ν•˜κ³  κ΄€λ ¨ 기사글 μž‘μ„±ν•˜λŠλƒκ³  VonNeumannAirport λ¬Έμ œμ™€ kwic 문제λ₯Ό 각각 5번 이상 ν’€μ–΄λ³΄κ²Œ λ˜μ—ˆλ‹€. (Python 으둜, CPlusPlus 둜, Java둜..) ν•˜μ§€λ§Œ, ν’€ λ•Œλ§ˆλ‹€ 맀번 κ·Έ κ²°κ³Όκ°€ λ‹€λ₯΄κ²Œ λ‚˜μ™”λ‹€. 같은 문제λ₯Ό 계속 ν’€λ‹€ λ³΄λ‹ˆ, 더 쉽고 더 κ°„λ‹¨ν•˜κ²Œ ν•΄λ‹Ή 단계λ₯Ό λ›°μ–΄λ„˜λŠ” 법이 λ³΄μ΄λŠ” 것이닀. 그리고 JuNe ν˜•κ³Ό Pair λ₯Ό ν•˜λŠ”μ€‘ μ²«μ§Έλ‚ λ•Œμ˜ 진행방법이 λ‹¬λžκ³ , λ‘˜μ§Έλ‚ , μ…‹μ§Έλ‚ .. 더 쒋은 방법듀이 계속 λ³΄μ΄λŠ” κ²ƒμ΄μ˜€λ‹€. κ·Έ 문제 μ‚¬μ΄μ¦ˆκ°€ 크건 μž‘κ±΄, μ—¬μœ λ₯Ό 가지고 λ‹€μ‹œ ν•΄λ³΄λŠ” κ²ƒμ—μ„œ μ–»λŠ” 점이 λ§ŽμŒμ„ 느끼게 λ˜μ—ˆλ‹€. --1002
Seminar:SoftwareDevelopmentMagazineμ—μ„œ OOP의 λŒ€κ°€ Uncle Bob은 PP와 TDD, λ¦¬νŒ©ν† λ§μ— λŒ€ν•œ 기사λ₯Ό μ—°μž¬ν•˜κ³  μžˆλ‹€. A Test of PatienceλΌλŠ” κΈ°μ‚¬μ—μ„œλŠ” λͺ‡ μ‹œκ°„, ν˜Ήμ€ λͺ‡ 일 κ±Έλ € μž‘μ„±ν•œ μ½”λ“œλ₯Ό 즐겁게 λ˜μ Έλ²„λ¦¬κ³  μƒˆλ‘œ μž‘μ„±ν•  μˆ˜λ„ μžˆλ‹€λŠ” DoItAgainToLearn(ν˜Ήμ€ ~cpp DoItAgainToImprove)의 κ°€λ₯΄μΉ¨μ„ μ „ν•œλ‹€.
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