conductor/src/internal/getAddReducer.js

A modern & functional JavaScript utility library

const type = require('../type')

const push = (array, value) => {
  array.push(value)
  return array
}
const add = (set, value) => {
  set.add(value)
  return set
}
const set = (map, value, key) => {
  map.set(key, value)
  return map
}
const assign = (object, value, key) => {
  object[key] = value
  return object
}

const getAddReducer = collection => {
  switch (type(collection)) {
  case 'array':
    return push
  case 'object':
    return assign
  case 'map':
    return set
  case 'set':
    return add
  }
}

module.exports = getAddReducer