group anagrams

var groupAnagrams = function(array) {
  const result = array.reduce((acc, cur, index) => {
        let word = cur.split(``).sort((a, b) => a.localeCompare(b)).join(``)
            if(!acc[word]){
                acc[word] = []
                acc[word].push(array[index])
            } else {
                acc[word].push(array[index])
            }
            return acc
    }, {})
    return Object.values(result)
};