find index of object in array javascript

var list = ["apple","banana","orange"]

var index_of_apple = list.indexOf("apple") // 0a = [
  {prop1:"abc",prop2:"qwe"},
  {prop1:"bnmb",prop2:"yutu"},
  {prop1:"zxvz",prop2:"qwrq"}];
    
index = a.findIndex(x => x.prop2 ==="yutu");

console.log(index);        
            
        
     let ranks = [1, 5, 7, 8, 10, 7];

let index = ranks.findIndex(
    (rank, index) => rank === 7 && index > 2
);

console.log(index);
var elementPos = array.map(function(x) {return x.id; }).indexOf(idYourAreLookingFor);
var objectFound = array[elementPos];        
            
        
     let ranks = [1, 5, 7, 8, 10, 7];
let index = ranks.findIndex(rank => rank === 7);
console.log(index);
const array1 = [5, 12, 8, 130, 44];
const findLargeNumber = (element) => element > 13;
console.log(array1.findIndex(findLargeNumber));
// expected output: 3

const array2 = [{id:1, dev:false}, {id:2, dev:false}, {id:3, dev:true}];
const WheresTheDev = (obj) => obj.dev === true;
console.log(array2.findIndex(WheresTheDev));
// expected output: 2