bingo-functional-js/src/Algorithms/Collection/fromPairs.js

A port of the PHP bingo-functional library

const head = require('./head')
const last = require('./last')
const sizeOf = require('./sizeOf')
const _fold = require('../Internal/_fold')

/**
 * fromPairs function
 *
 * fromPairs :: [[k, v]] -> Object k v
 * @param {array} list
 * @returns {object}
 * @example
 *
 * fromPairs([['foo', 'bar'], ['baz', 'fooz']])
 * // => { foo: 'bar', baz: 'fooz' }
 */
const fromPairs = (list) => _fold(
  (acc, val) => {
    if (Array.isArray(val) && sizeOf(val) === 2) {
      acc[head(val)] = last(val)
    }

    return acc
  },
  list,
  {},
)

module.exports = fromPairs