SOURCE

var arr = [];
for(var i = 0;i < 10;i++){
  arr.push(i);
}

console.log(arr.slice(5,8));

console.log(arr.map(function(val){
  return val+"好棒"
}))
console.log(arr.splice(5,0,"好","好棒"))
console.log(arr.concat(["很好","很不错"]));
console.log(arr);