functional js reduce

countStrings.js

module.exports = function countWords(arr) {
	return arr.reduce(function(prev, curr) {
		prev[curr] = prev[curr] + 1 || 1
		return prev
	}, {})
}

mysolution.js

module.exports = function countStrings(inputWords) {
 	return inputWords.reduce(function(acc, current) {
 		acc[current] = inputWords.filter(function(word) {
 			return word === current
 		}).length
 		return acc
 	}, {})
 }