如何获取此数组中对象的索引？

Question

I have an array of objects as follows:

myArr:[obj{}. obj{}, obj{}, obj{}]

How can I return the index of each object in the array? This snippet is inside a bigger for loop which will iterate the same amount of times as there are objects in my array.

var ret = 'Index: '

if(myArr.length > 0){
    var idx = myArr.obj.index??

    var ret += idx;
}

console.log(ret); //Which will hopefully be Index: 0 etc...

Any advice would be greatly appreciated. Cheers

Answer 1

JavaScript Array provides an indexOf method that returns the index of the passed-in value:

var o1 = {foo: 'bar'}
var o2 = {foo: 'bar'}

var a = [o1, o2]

console.log(a.indexOf(o1)) // 0
console.log(a.indexOf(o2)) // 1

Answer 2

I can't comment, but the array indexes will be a list of numbers from 0 to myArr.length - 1. To get the list you could do the following:

var arr = ["Hi", "How" "Are", "You"];
var indexes = [];

for(var i = 0; i < arr.length; i++)
    indexes.push(i);