JavaScript遍历数组的方法代码实例

 let arr=["A","B","C","D","E","F"];
 for(let i=0;i<arr.length;i++){
  console.log(arr[i]);
 }

 let arr=["A","B","C","D","E","F"];
 for(let item of arr){
   console.log(item); 
 }
//A B C D E F

 let arr=["A","B","D","E","F"];
 for(let item in arr){
   console.log(item); 
 }
//0 1 2 3 4 5

 let arr=["A","B","C","D","E","F"];
 for(let item of arr.keys()){
   console.log(item); 
 }
 //0 1 2 3 4 5

 let arr=["A","B","C","D","E","F"];
 for(let item of arr.values()){
   console.log(item); 
 }
 //A B C D E F

let arr=["A","B","C","D","E","F"];
for(let item of arr.entries()){
  console.log(item); 
}
/
[ 0, 'A' ]
[ 1, 'B' ]
[ 2, 'C' ]
[ 3, 'D' ]
[ 4, 'E' ]
[ 5, 'F' ]
/