break array of objects into separate arrays based on a property

Question

Say I have an array like this:

var arr = [
    {type:\"orange\", title:\"First\"},
    {type:\"orange\", title:\"Second\"},
    {type:\"banana\", title:\"Thi         


        

Answer 1

ES6 solution:

function groupBy(arr, property) {
  return arr.reduce((acc, cur) => {
    acc[cur[property]] = [...acc[cur[property]] || [], cur];
    return acc;
  }, {});
}

or completely ES6fy:

const groupBy = (arr, property) => {
    return arr.reduce((acc, cur) => {
      acc[cur[property]] = [...acc[cur[property]] || [], cur];
      return acc;
    }, {});
}

I hope it helps!