function insertDashes(arr) {
  let dashedStr = '';

  for (i in arr) {
    if (i < arr.length - 1 && arr[Number(i) + 1] !== ' ' && arr[i] !== ' ') {
      dashedStr += arr[i] + '-';
    } else {
      dashedStr += arr[i]
    }
  }

  return dashedStr;
}


/**
* 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");
    });
});