map-anything

Map anything 🗺

npm i map-anything

Array.map but for objects. A small and simple integration.

Motivation

I always want to do:

someObject.map(val => someFunction)

But this doesn't exist for objects, so you need to do this instead:

Object.entries(someObject).reduce((carry, [key, value], index, array) => {
  carry[key] = someFunction(value, index, array)
  return carry
}, {})

So I made a wrapper function for that. 😃

Meet the family

• copy-anything 🎭
• merge-anything 🥡
• filter-anything ⚔️
• find-and-replace-anything 🎣
• compare-anything 🛰
• flatten-anything 🏏
• is-what 🙉

Usage

import { mapObject } from 'map-anything'

const pokemon = {
  '001': { name: 'Bulbasaur', level: 10 },
  '004': { name: 'Charmander', level: 8 },
  '007': { name: 'Squirtle', level: 11 }
}

const levelUp = mapObject(pokemon, pkmn => {
  pkmn.level++
  return pkmn
})

levelUp ===
  {
    '001': { name: 'Bulbasaur', level: 11 },
    '004': { name: 'Charmander', level: 9 },
    '007': { name: 'Squirtle', level: 12 }
  }

Please note, just like Array.map when using nested values/objects, the original object will also have its values modified because of references.

Source code

The source code is literally just this:

function mapObject (object, fn) {
  return Object.entries(object)
    .reduce((carry, [key, value], index, array) => {
      carry[key] = fn(value, index, array)
      return carry
    }, {})
}