// *** OUTPUT  : ['S-A-K-I-B' ,'A-T-A-N-U' , 'A-H-O-N-A' , 'P-R-I-O-N-T-I' , 'A-R-I-K']


var arr = ['sakib','atanu','ahona','prionti','arik'];

function myFunc(array , action){

  var newArr = [];

  for(i=0; i<array.length ; i++){

    newArr.push(action(array[i]));

  }
  return newArr ;
}

var finalArr = myFunc(arr, function(val){

  return val.toUpperCase().split('').join('-');
});

console.log(finalArr);