如何按 javascript 中的属性值对对象的多维数组进行排序？

Question

I have the following array:

const result = [
  [{value: 123, parentID: 1}, {value: 'string123', parentID: 2}],
  [{value: 54764, parentID: 1}, {value: 'string321', parentID: 2}],
  [{value: 321, parentID: 1}, {value: 'string565632', parentID: 2}],
]

and I need to sort this, multidimensional array based on the value, but which object to select is based on parentID .

What I have tried so far:

const parentID = 1;
const sortedResult = result.filter((row) => {
  const selectedColumn = row.find((column) => column.parentID === parentID));
  return _.orderBy(selectedColumn, ['value'], ['asc']);
});

but this isn't working, any ideas what could?

Desired output would be:

[
  [{value: 123, parentID: 1}, {value: 'string123', parentID: 2}],
  [{value: 321, parentID: 1}, {value: 'string565632', parentID: 2}],
  [{value: 54764, parentID: 1}, {value: 'string321', parentID: 2}],
]

Answer 1

To sort an array, you should use Array.prototype.sort .

Make a helper function that, given an array item (which, here, is itself an array), finds the object with the parentID , and extracts its value. In the .sort callback, call that helper function on both items being compared, and return the difference:

 const parentID = 1; const getValue = arr => arr.find(item => item.parentID === parentID).value; const result = [ [{value: 123, parentID: 1}, {value: 'string123', parentID: 2}], [{value: 54764, parentID: 1}, {value: 'string321', parentID: 2}], [{value: 321, parentID: 1}, {value: 'string565632', parentID: 2}], ]; result.sort((a, b) => getValue(a) - getValue(b)); console.log(result);