The avatar for @maddievision
maddie lim ✨
aka DJ Bouche
Published
Riichi Mahjong
Edited
Jul 23, 2022
Importers
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handChecker("5m-5m-5m-6p-6p-4s-5s-6s-7s-8s-9s-6z-6z-6z")
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handChecker("1m-1m-3m-4m-5m-1p-1p-1p-5s-7s-8s-9s-1z-2z")
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handChecker("3m-3m-4m-4m-5m-5m-6m-6m-3p-5p-9s-9s-9s-4p")
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handChecker("7m-7m-1p-2s-3s-6s-7s-8s-5z-6z-6z-7z-7z-4s")
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handChecker("1m-1m-2m-2m-2p-2p-7p-7p-1z-1z-5z-5z-7z-7z")
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handChecker("1m-9m-1p-9p-1s-9s-1z-2z-3z-4z-5z-6z-7z-9p")
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vec = handStrToVec(exHand)
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printVec(vec)
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printVec(allActions[48].vec)
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printVec(allActions[32].vec)
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applyAction = (vec, action) => {
return vec.map((m, i) => m - action.vec[i]);
}
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printVec(applyAction(vec, allActions[48]))
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mh(vecToHandStr(applyAction(vec, allActions[48])))
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possibleActions = (vec, actions) => {
return actions.filter((action) => {
const s = applyAction(vec, action);
const x = s.filter((m) => m < 0).length;
return x === 0;
});
}
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availableActions = possibleActions(vec, allActions)
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printActions(availableActions)
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mh(vecToHandStr(applyAction(vec,availableActions[0])))
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mh(vecToHandStr(applyAction(vec,availableActions[1])))
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mh(vecToHandStr(applyAction(vec,availableActions[2])))
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availableHeadActions = possibleActions(vec, headActions)
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printActions(availableHeadActions, 8)
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mh(vecToHandStr(applyAction(vec,availableHeadActions[0])))
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mh(vecToHandStr(applyAction(vec,availableHeadActions[1])))
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mh(vecToHandStr(applyAction(vec,availableHeadActions[2])))
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mh(vecToHandStr(applyAction(vec, availableHeadActions[3])))
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function checkHandValid(vec, actions, headActions, appliedActions = []) {
/** No more tiles to process. We‘ve got a valid hand! **/
if (isVecEmpty(vec)) {
return [true, appliedActions];
}

const availActions = possibleActions(vec, actions);
const availHeadActions =
headActions != null ? possibleActions(vec, headActions) : [];

for (let i = 0; i < availActions.length; i++) {
const action = availActions[i];
const aplVec = applyAction(vec, action);
const [res, resAppliedActions] = checkHandValid(
aplVec,
actions,
headActions,
[...appliedActions, action]
);
if (res) {
return [res, resAppliedActions];
}
}

// TODO: we could probably reduce the code repetition.

for (let i = 0; i < availHeadActions.length; i++) {
const action = availHeadActions[i];
const aplVec = applyAction(vec, action);
/**
* When we check the next level, we no longer pass `headActions`
* since once it is applied, we can no longer check it.
*/
const [res, resAppliedActions] = checkHandValid(aplVec, actions, null, [
...appliedActions,
action
]);
if (res) {
return [res, resAppliedActions];
}
}

return [false, appliedActions];
}
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exResult = checkHandValid(vec, allActions, headActions)
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exResult[0] ? md`### This is a valid hand!` : md`### This is NOT a valid hand.`
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exResult[0] ? printActions(exResult[1]) : null
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checkStandard = (vec) => checkHandValid(vec, allActions, headActions);
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checkThirteenOrphans = (vec) => checkHandValid(vec, thirteenOrphanActions, thirteenOrphanHeadActions);
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checkSevenPairs = (vec) => checkHandValid(vec, sevenPairsActions)
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printActions(allActions)
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printActions(headActions)
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printActions(thirteenOrphanActions)
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printActions(thirteenOrphanHeadActions)
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printActions(sevenPairsActions)
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