出力が逆順なのが気持ち悪かったので、Prolog と同じになるように手直し。
Integer >> factors: factors amplitudes: amplitudes ifFail: failBlock "27 factors: #(24 11 3) amplitudes: #(0) ifFail: [^ nil]" | amps factor newAmps rest newFail | amps _ amplitudes. factor _ factors first. (factors size = 1 and: [amps last isZero]) ifTrue: [ self \\ factor = 0 ifTrue: [ Transcript cr; show: (amps allButLast copyWith: self // factor)]. ^ failBlock value]. newAmps _ amps copyWith: 0. newFail _ [^ self factors: factors allButFirst amplitudes: newAmps ifFail: failBlock]. (rest _ self - factor) >= 0 ifTrue: [ amps at: amps size put: (amps last + 1). ^ rest factors: factors amplitudes: amps ifFail: newFail]. ^ newFail value
30 factors: #(10 5 1) amplitudes: #(0) ifFail: [^ nil] "=> #(3 0 0) #(2 2 0) #(2 1 5) #(2 0 10) #(1 4 0) #(1 3 5) #(1 2 10) #(1 1 15) #(1 0 20) #(0 6 0) #(0 5 5) #(0 4 10) #(0 3 15) #(0 2 20) #(0 1 25) #(0 0 30) "
