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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Evolutionary-algorithm/Oforth/evolutionary-algorithm.fth Normal file
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200 Constant new: C
5 Constant new: RATE
: randChar // -- c
27 rand dup 27 == ifTrue: [ drop ' ' ] else: [ 'A' + 1- ] ;
: fitness(a b -- n)
a b zipWith(#==) sum ;
: mutate(s -- s')
s map(#[ 100 rand RATE <= ifTrue: [ drop randChar ] ]) charsAsString ;
: evolve(target)
| parent |
ListBuffer init(target size, #randChar) charsAsString ->parent
1 while ( parent target <> ) [
ListBuffer init(C, #[ parent mutate ]) dup add(parent)
maxFor(#[ target fitness ]) dup ->parent . dup println 1+
] drop ;