let arr = ['js','脚本','js脚本'];
arr.fill('web',1,3);
console.log(arr);
for(let item of arr){
console.log(item);
}
for(let item of arr.keys()){
console.log(item);
}
for(let item of arr.entries()){
console.log(item);
}
for([index,val] of arr.entries()){
console.log(index + ':' + val);
}
let list = arr.entries();
console.log(list);
console.log(list.next().value);
console.log('-----------------');
console.log(list.next().value);
console.log('*****************');
console.log(list.next().value);
console.log('=================');
