function insertDashes(str) {
    var arr = str.split('');
    var second = '';
    for (var i=0; i < str.length - 1; i++) {
        if (arr[i+1] != ' ' && arr[i] != ' ') {
            second += arr[i] + "-";
        } else {
            second += arr[i];
        }
    }
    second += arr[arr.length - 1];
    return second;
}



/**
* Test Suite 
*/
describe('insertDashes()', () => {
    it('insert dashes in between chars', () => {
        // arrange
        const value = "aba caba";
        
        // act
        const result = insertDashes(value);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe("a-b-a c-a-b-a");
    });
});