combinations

const fs = require("fs");

const motherList = [
  [9, 5, 2, 8, 9, 9],
  [3, 3, 5, 1, 4, 5, 1, 2],
  [1, 2, 9, 5, 4, 7, 3],
  [7, 5, 8, 8, 4],
  [5, 1, 4, 2],
];

function runAlgo(motherList) {
  for (let i = 0; i < motherList.length - 1; i++) {
    const list = motherList[i];
    let nextList = motherList[i + 1];
    if (i == 0) {
      motherList[i + 1] = motherList[i + 1].map((value) =>
        list.map((value2) => [value2, value])
      );
    } else {
      motherList[i + 1] = motherList[i + 1].map((value) =>
        list.flat(1).map((value2) => [...value2, value])
      );
    }
  }
}
runAlgo(motherList);
const permutations = motherList[4].flat(1);
console.log(JSON.stringify(permutations));

fs.writeFileSync("./combinations.json", JSON.stringify({ permutations }));