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Reframing The Problem - TrueNorthPHP 2014
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Daniel Cousineau
November 08, 2014
Technology
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Reframing The Problem - TrueNorthPHP 2014
https://joind.in/talk/view/12724
Daniel Cousineau
November 08, 2014
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Transcript
reframing the problem
how to think like a computer scientist
how to think
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please rate me on joind.in https://joind.in/12724
how to think like a computer scientist
to solve our problem, we must first invent the universe
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mental set
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functional fixedness
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reduction
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go rubber duck yourself
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4 6 3 7 5 8 up
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4 6 3 7 5 8 up 1 2 4 6 3 7 5 8 right
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4 6 3 7 5 8 up 1 2 4 6 3 7 5 8 right 4 1 2 6 3 7 5 8 right
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A* -> queue = expand(initial) while queue is not empty:
dequeue move from queue if move is solution: return move concat expand(move) to queue sort queue by heuristic
expand(state) -> moves = [] if left valid move: add
state.move(left) to moves if right valid move: add state.move(left) to moves if up valid move: add state.move(left) to moves if down valid move: add state.move(left) to moves return moves
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6 1 3 7 5 8 4 1 2 6 3 7 5 8 4 1 2 6 5 3 7 8 4 1 2 6 3 7 5 8
heuristic(state) -> manhattan(state) + outofplace(state)
heuristic
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so what did we learn?
don’t fixate
pull back, abstract
write down everything you know
if all else fails, google.
please rate ALL talks https://joind.in/12724