replaceOrAppend

193 bytes

Usage

Given an array of items, an item and an identity function, returns a new array with the item either replaced at the index of the existing item — if it exists, else it is appended at the end.

import * as _ from 'radashi'

const fish = [
  {
    name: 'Marlin',
    weight: 105,
  },
  {
    name: 'Salmon',
    weight: 19,
  },
  {
    name: 'Trout',
    weight: 13,
  },
]

const salmon = {
  name: 'Salmon',
  weight: 22,
}

const sockeye = {
  name: 'Sockeye',
  weight: 8,
}

_.replaceOrAppend(fish, salmon, f => f.name === 'Salmon') // => [marlin, salmon (weight:22), trout]
_.replaceOrAppend(fish, sockeye, f => f.name === 'Sockeye') // => [marlin, salmon, trout, sockeye]