我如何計算 Javascript 中多維數組中的相似值

Question

我如何計算這個二維數組中的相似值？ 請幫忙

var data = [[0,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[1,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[2,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[4,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[3,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[6,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0],[7,0]]

我想要這樣的東西

var data3d = [[0,0,1],[1,0,12],[2,0,25]......

我想將計數值保存在第三個空間

Answer 1

您可以使用減少 function 如下

const reducedArray= data.reduce((accumulator, currentValue) => {
  if(accumulator[currentValue]) accumulator[currentValue][2]++;
  else accumulator[currentValue] = [...currentValue, 1];
  return accumulator;
}, {});

const data3d = Object.values(reducedArray);