get an array sort function

get-array-sorter.js

export default (property, ascOrDesc = 'asc') => (a, b) => {
  const asc = ascOrDesc === 'asc'
  const valA = a[property]
  const valB = b[property]
  if (valA > valB) {
    return asc ? 1 : -1
  }
  if (valB > valA) {
    return asc ? -1 : 1
  }
  return 0
}

usage.js

import getSortByFn from './get-array-sorter'

const people = [{name: 'Henrik'}, {name: 'Arunesh'}, {name: 'Bryan'}, {name: 'Tim'}] 

// note that array.sort sorts items in place, if you want a copy of the array do this
const copy = people.slice()

copy.sort(getSortByFn('name', 'desc')) 
// or 
copy.sort(getSortByFn('name', 'asc'))