function sortByLength(strs) {
    //  write code here.
    console.log(strs);
    let answer = strs.sort(
        function(a,b){
            return a.length - b.length;
        }
    );
        console.log(answer);
        return answer;
}

/**
* Test Suite 
*/
describe('sortByLength()', () => {
    it('sorts the strings from shortest to longest', () => {
        // arrange
        const strs = ["abc", "", "aaa", "a", "zz"];
        
        // act
        const result = sortByLength(strs);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toEqual(["", "a", "zz", "abc", "aaa"]);
    });
});