removeDuplicate.js

const removeDuplicate = (arr, key, value, nkey = key, nvalue = value) => {
  const bail = arr.reduce((a, b) => Object.assign(a, { [b[key]]: b[value] }));
  return Object.keys(bail).map(key => ({
    [nkey]: key,
    [nvalue]: bail[key]
  }));
};