function insertDashes(arr) {
    const wrds = arr.split(' ');
    console.log('wrds . split(" "): '+wrds);
    
    const result = wrds.map(words =>{return words.split('').join('-');
    });     
    console.log('result : '+result);
    
    return result.join(' ');
     console.log('result.join(" ") : '+result);                                          
}



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