const recordList = [
  { id: 1, a: 'b' },
  { id: 2, foo: 'bar' },
  { id: 3, hello: 'world' },
]

/**
 * Lodash Version
 */
import { property, keyBy } from 'lodash/fp'

const keyById = keyBy(property('id'))

const recordMap = keyById(recordList)

/**
 * Manual Version
 */
export function keyBy(key: string) {
  const keyByReducer = (map, item) => ({
    ...map,
    [item[key]]: item,
  })

  return (collection) => collection.reduce(keyByReducer, {})
}

// Create re-usable function for a specific key
const keyById = keyBy('id')
const recordMap2 = keyById(recordList)

// Chain method calls
const recordMap3 = keyBy('id')(recordList)