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Randomize new partner rather than run whole process #264

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11 changes: 7 additions & 4 deletions src/model/model.class.ts
Original file line number Diff line number Diff line change
Expand Up @@ -283,11 +283,14 @@ export class Model {
return this.mutatePermutation();
}

const partner = min + 1 == max ? min : Paul.chooseBetween(max, min, BIAS.REVERSE_BELL);
if (chosen == partner) {
// would that ever happen ?
return this.mutatePermutation();
let partner = min + 1 == max ? min : Paul.chooseBetween(max, min, BIAS.REVERSE_BELL);
while (chosen == partner) {
// if chosen is same as partner
// randomize until it isn't
// this will work on condition: there are more than two choices in range.
partner = Paul.chooseBetween(max, min, BIAS.REVERSE_BELL);
}

const [a] = Model._order.splice(chosen, 1);

const b = Model._order[partner];
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