const numbers = [4, 9, 16, 25, 29];

let first = numbers.find(myFunction);

​

function myFunction(value, index, array) {

  return value > 18;

}

const inventory = [

  {name: 'apples', quantity: 2},

  {name: 'cherries', quantity: 8}

  {name: 'bananas', quantity: 0},

  {name: 'cherries', quantity: 5}

  {name: 'cherries', quantity: 15}

];

​

const result = inventory.find( ({ name }) => name === 'cherries' );

​

console.log(result) // { name: 'cherries', quantity: 5 }

const array1 = [5, 12, 8, 130, 44];

​

const found = array1.find(element => element > 10);

​

console.log(found);

// expected output: 12

const array1 = [5, 12, 8, 130, 44];

​

const found = array1.find(element => element > 10);

​

console.log(found);

// expected output: 12

​

const myArray = ["sun","moon","earth"];

const lookingFor = "earth"

​

console.log(myArray.find(planet => { return planet === lookingFor })

// expected output: earth

var ages = [3, 10, 18, 20];

​

function checkAdult(age) {

  return age >= 18;

}

/* find() runs the input function agenst all array components

   till the function returns a value

*/

ages.find(checkAdult);

​

function include(arr, obj) {

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

    if (arr[i] == obj) return true;

  }

}

​

console.log(include([1, 2, 3, 4], 3)); // true

console.log(include([1, 2, 3, 4], 6)); // undefined

 Run code snippet

const list = [5, 12, 8, 130, 44];

// a find metóduson belül a number egy paraméter

// azért nem szükséges köré a zárójel, mert csak egy paramétert adunk át

// minden más esetben így kell írni:

// const found = list.find((index, number) => number > index);

const found = list.find(number => number > 10);

console.log(found);

// --> 12