foop/dist/deps/loop/reduce/reduceArrayToObj.js

interfaces that describe their intentions.

var toKey = require('../../cast/toKey')
var isNil = require('../../is/nullOrUndefined')
var isObj = require('../../is/obj')

// @TODO ~ also see reduceMap it has keyValReducer, can do `isPairs`
var defaultReduceArrayToObjIterator = function (reduced, next, index) {
  if (isObj(next)) { Object.assign(reduced, next) }
  else { reduced[toKey(index)] = next }

  return reduced
}

/**
 * @since 4.0.0
 * @version 5.0.0 <- added index
 *
 * @param {Array} array array to reduce to object
 * @param {Function} iterator function to call on reduced, with `next`
 * @return {Object} reduced array
 *
 *
 * @name reduceObj
 * @alias reduceObject
 * @alias toObj
 *
 * @see Chainable
 *
 * @TODO example
 * @TODO @curried 2
 */
module.exports = function reduceArrayToObj(array, iterator) {
  if (isNil(iterator)) { iterator = defaultReduceArrayToObjIterator }

  var index = 0
  return array.reduce(function(reduced, next) {
    iterator(reduced, next, index)
    return reduced
  }, {})
}

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