JSFiddle - React, Tailwind, and code Playground

JavaScript

var fruits = []
fruits.push(["Banana", "Orange", "Apple", "Mango"]);
fruits.push(["Apple", "3Orange", "Amar", "Mango"]);
fruits.push(["Apple", "1Orange", "Amar", "Mango"]);
fruits.push(["Apple", "2Orange", "Amar", "Mango"]);


var str = [];
str.push(["Apple", "2Orange", "Amar", "Mango"]);
var i  = checkIt(fruits, str[0]);
alert(i);

function checkIt(src, arr){
  arr = arr.toString();
  var ind = -1;
  src.forEach(function(itm,i){
    if(itm.toString() == arr){
      ind = i;
      return;
    }
  });
  return ind;
}