Javascript 中的 entries()函数

array.entries ()

<script type="text/javascript">
// JavaScript to illustrate entries() method
 var array1 = ["javaTpoint","Core java","Advanced java"];


var iterator1 = array1.entries();


document.write(iterator1.next().value);

document.write("<br>")
// expected output: Array [0, "javaTpoint"]


document.write(iterator1.next().value);
// expected output: Array [1, "Core java"]

</script> 

<script type="text/javascript">
// JavaScript to illustrate entries() method
// Input array
var a = ['Core Java', 'Python', 'Android'];
var iterator = a.entries();
for (let e of iterator) {
document.write("<br>") 
document.write(e);
}
// expected output
// [0, 'core Java']
// [1, 'Python']
// [2, 'Android'] 
</script>