Group Anagrams

anagrams.js

function group(arr){
    let result = [];
    let j=0;
    let tmp = arr;
    while(tmp.length > 0){
        let cmp = tmp[0];
        result[j] = [];
        for(let i=0; i<tmp.length;i++){
            if(isAnagram(cmp, tmp[i])){
                result[j].push(tmp[i]);
                tmp.splice(i,1);
            }
        }
        j++;
    }
    return result.filter(function(i){
        return i.length > 1
    });
}

function isAnagram(a, b){
    let sortedA = a.split('').sort().join('');
    let sortedB = b.split('').sort().join('');
    return sortedA == sortedB;
}

let result = group(["bat", "tar", "xyz", "tab", "tar", "abt"]);
console.log(result);