JSFiddle - React, Tailwind, and code Playground

JavaScript

function findIndex(arr, key) {
    	for (var i = 0, l = arr.length; i < l; i++) {
			if (arr[i].hasOwnProperty(key)) {
				return i;
			}
		}
    	
    	return -1;
    }


    var myVar = new Array();
    myVar.push({'abc':'123'});
    myVar.push({'ghi':'789'});

alert(myVar(0));
//    alert('ghi : ' + findIndex(myVar, 'abc'));