全组合判断

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function isFullCombination(datas) {   if (datas.length === 0) {     return false;   }   const keys = Object.keys(datas[0]);   const entries = keys.map((k) => [k, new Set()]);   const fieldMap = new Map(entries);   //Map(3) { '字段1' => Set(0) {}, '字段2' => Set(0) {}, '字段3' => Set(0) {} }   const serializedSet = new Set();   for (const data of datas) {     const serialized = JSON.stringify(data)     if(serializedSet.has(serialized)){         return false     }     serializedSet.add(serialized)     for (const key of keys) {         const value = data[key]         fieldMap.get(key).add(value);     }   } //   console.log(fieldMap.values());       const n1 = [...fieldMap.values()].reduce((a,b)=>a*b.size,1)   const n2 = datas.length   return  n2 === n1 } const inputData = [   { 字段1: "甲", 字段2: "a", 字段3: 1 },   { 字段1: "甲", 字段2: "a", 字段3: 2 },   { 字段1: "甲", 字段2: "a", 字段3: 3 },   { 字段1: "甲", 字段2: "b", 字段3: 1 },   { 字段1: "甲", 字段2: "b", 字段3: 2 },   { 字段1: "甲", 字段2: "b", 字段3: 3 },   { 字段1: "乙", 字段2: "a", 字段3: 1 },   { 字段1: "乙", 字段2: "a", 字段3: 2 },   { 字段1: "乙", 字段2: "a", 字段3: 3 },   { 字段1: "乙", 字段2: "b", 字段3: 1 },   { 字段1: "乙", 字段2: "b", 字段3: 2 },   { 字段1: "乙", 字段2: "b", 字段3: 3 }, ]; console.log(isFullCombination(inputData));