Answers for "how to check if an object is in an array javascript"

if object is array javascript

Array.isArray(object);

check object in array javascript

var obj = {a: 5};
var array = [obj, "string", 5]; // Must be same object
array.indexOf(obj) !== -1 // True

check if object is present in array javascript

//Use something like this:

function containsObject(obj, list) {
    var i;
    for (i = 0; i < list.length; i++) {
        if (list[i] === obj) {
            return true;
        }
    }

    return false;
}

//In this case, containsObject(car4, carBrands) is true. Remove the carBrands.push(car4); call and it will return false instead. If you later expand to using objects to store these other car objects instead of using arrays, you could use something like this instead:

function containsObject(obj, list) {
    var x;
    for (x in list) {
        if (list.hasOwnProperty(x) && list[x] === obj) {
            return true;
        }
    }

    return false;
}

how to check if an object is in an array javascript

//We will make a search box kind of thing. It will ask the user to enter a fruit and we will make a list fruits. If the user input is in list, then print you win

//Make a list for fruits
var FRUITS = ["Apple","Bananna","Mango","Kiwi"];

//User input
var User_Input = prompt("Enter a fruit");

//Variable to check if user_input is in fruit
var UserInFruit = FRUITS.contains(User_Input);

//If staatement
if (UserInFruit = true){
  print("You win")
}