Script•3y ago

Script – 22-22 Mar 9

I'm not sure why my sort in the for loop is not working

var subsets = function (nums) {
  let res = nums.reduce(
    (subsets, value) =>
      subsets.concat(
        subsets
          .map((set) => [value, ...set])
          .sort(function (a, b) {
            return a - b;
          })
      ),
    [[]]
  );

  for (let i = 1; i < res.length + 1; i++) {
    res[i] = res[i].sort(function (a, b) {
      return a - b;
    });
  }

  return res;
};
console.log(subsets([1, 2, 3]));

var subsets = function (nums) {
  let res = nums.reduce(
    (subsets, value) =>
      subsets.concat(
        subsets
          .map((set) => [value, ...set])
          .sort(function (a, b) {
            return a - b;
          })
      ),
    [[]]
  );

  for (let i = 1; i < res.length + 1; i++) {
    res[i] = res[i].sort(function (a, b) {
      return a - b;
    });
  }

  return res;
};
console.log(subsets([1, 2, 3]));

It says TypeError: Cannot read properties of undefined (reading 'sort')

4 Replies

ScriptOP•3y ago

although I already did the sort function in the initial let res

let res = nums.reduce(
    (subsets, value) =>
      subsets.concat(
        subsets
          .map((set) => [value, ...set].sort(function (a, b) {
            return a - b;
          }))
      ),
    [[]]
  );

let res = nums.reduce(
    (subsets, value) =>
      subsets.concat(
        subsets
          .map((set) => [value, ...set].sort(function (a, b) {
            return a - b;
          }))
      ),
    [[]]
  );

But I still want to know why the sort is reading undefined in the for loop

Unknown User•3y ago

Message Not Public

ScriptOP•3y ago

oh my bad fvck me thanks a lot

reactibot•3y ago

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